Commit Graph

573941 Commits

Author SHA1 Message Date
Jiri Olsa
01441af5df perf hists: Factor output_resort from hists__output_resort
Currently hists__output_resort() depends on hists based on hists_evsel
struct, but we need to be able to sort common hists as well.

Cutting out the sorting base sorting code into output_resort
function, so it can be reused in following patch.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1453109064-1026-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-03 11:13:11 -03:00
Ingo Molnar
8eb22c984e perf/core callchain fixes and improvements
User visible:
 
 - Make --percent-limit apply to callchains also and fix some bugs
   related to --percent-limit (Namhyung Kim)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-3' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core callchain fixes and improvements from Arnaldo Carvalho de Melo <acme@redhat.com:

User visible changes:

  - Make --percent-limit apply to callchains also and fix some bugs
    related to --percent-limit (Namhyung Kim)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03 11:02:37 +01:00
Ingo Molnar
d072b89d3b New features:
- Port 'perf kvm stat' to PowerPC (Hemant Kumar)
 
 Infrastructure:
 
 - Use the 'feature-dump' target to do the feature checks just once and then
   add code to reuse that in the tests/make makefile, speeding up the
   'make -C tools/perf build-test' target (Wang Nan)
 
 - Reduce the number of tests the 'build-test' target do to those that don't
   pollute the source tree (Arnaldo Carvalho de Melo)
 
 - Improve the output of the build tests a bit by aligning the name of the
   tests, more can be done to filter out uninteresting info in the output
   (Arnaldo Carvalho de Melo)
 
 - Add perf_evlist pointer to *info_priv_size(), more prep work for
   supporting the coresight architecture (Mathieu Poirier)
 
 - Improve the 'perf test bp_signal' test (Wang Nan)
 
 - Check environment before starting the BPF 'perf test', so that we can just
   'Skip' older kernels instead of 'FAIL'ing them (Wang Nan)
 
 - Fix cpumode of synthesized buildid event (Wang Nan)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf tooling changes from Arnaldo Carvalho de Melo:

New features:

 - Port 'perf kvm stat' to PowerPC (Hemant Kumar)

Infrastructure changes:

 - Use the 'feature-dump' target to do the feature checks just once and then
   add code to reuse that in the tests/make makefile, speeding up the
   'make -C tools/perf build-test' target (Wang Nan)

 - Reduce the number of tests the 'build-test' target do to those that don't
   pollute the source tree (Arnaldo Carvalho de Melo)

 - Improve the output of the build tests a bit by aligning the name of the
   tests, more can be done to filter out uninteresting info in the output
   (Arnaldo Carvalho de Melo)

 - Add perf_evlist pointer to *info_priv_size(), more prep work for
   supporting the coresight architecture (Mathieu Poirier)

 - Improve the 'perf test bp_signal' test (Wang Nan)

 - Check environment before starting the BPF 'perf test', so that we can just
   'Skip' older kernels instead of 'FAIL'ing them (Wang Nan)

 - Fix cpumode of synthesized buildid event (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03 11:00:29 +01:00
Ingo Molnar
402e8db5c1 perf/core improvements and fixes:
User visible:
 
 - Rename the "colors.code" ~/.perfconfig variable to "colors.jump_arrows",
   as it controls just the that UI element in the annotate browser (Taeung Song)
 
 - Avoid trying to read ELF symtabs from device files, noticed while doing
   memory profiling work (Jiri Olsa)
 
 - Improve context detection when offering options in the hists browser,
   i.e.  some options don't make sense when the browser is not working with
   a perf.data file ('perf top' mode), only in 'perf report' mode, like
   scripting (Namhyung Kim)
 
 Infrastructure:
 
 - Elliminate duplication in the hists browser filter functions, getting the
   common part into a function that receives callbacks for filtering by
   DSO, thread, etc (Namhyung Kim)
 
 - Fix misleadingly indented assignment, found using
   gcc6 -Wmisleading-indentation (Markus Trippelsdorf)
 
 - Handle LLVM relocation oddities in libbpf, introducing a 'perf test' that
   detects such problems and then fixing the problem, so that the test now
   passes (Wang Nan)
 
 - More improvements to the build infrastructure to allow reusing the
   feature detection facilities (Wang Nan)
 
 - Auto initialize the globals needed by cpu__max_{cpu,node}() routines
   (Arnaldo Carvalho de Melo)
 
 Documentation:
 
 - Document the perf sysctls in Documentation/sysctl/kernel.txt (Ben Hutchings)
 
 - Document a bunch more ~/.perfconfig knobs (Taeung Song)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

 - Rename the "colors.code" ~/.perfconfig variable to "colors.jump_arrows",
   as it controls just the that UI element in the annotate browser (Taeung Song)

 - Avoid trying to read ELF symtabs from device files, noticed while doing
   memory profiling work (Jiri Olsa)

 - Improve context detection when offering options in the hists browser,
   i.e.  some options don't make sense when the browser is not working with
   a perf.data file ('perf top' mode), only in 'perf report' mode, like
   scripting (Namhyung Kim)

Infrastructure changes:

 - Elliminate duplication in the hists browser filter functions, getting the
   common part into a function that receives callbacks for filtering by
   DSO, thread, etc. (Namhyung Kim)

 - Fix misleadingly indented assignment, found using
   gcc6 -Wmisleading-indentation (Markus Trippelsdorf)

 - Handle LLVM relocation oddities in libbpf, introducing a 'perf test' that
   detects such problems and then fixing the problem, so that the test now
   passes (Wang Nan)

 - More improvements to the build infrastructure to allow reusing the
   feature detection facilities (Wang Nan)

 - Auto initialize the globals needed by cpu__max_{cpu,node}() routines
   (Arnaldo Carvalho de Melo)

Documentation changes:

 - Document the perf sysctls in Documentation/sysctl/kernel.txt (Ben Hutchings)

 - Document a bunch more ~/.perfconfig knobs (Taeung Song)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03 10:58:46 +01:00
Linus Torvalds
34229b2774 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 "This looks like a lot but it's a mixture of regression fixes as well
  as fixes for longer standing issues.

   1) Fix on-channel cancellation in mac80211, from Johannes Berg.

   2) Handle CHECKSUM_COMPLETE properly in xt_TCPMSS netfilter xtables
      module, from Eric Dumazet.

   3) Avoid infinite loop in UDP SO_REUSEPORT logic, also from Eric
      Dumazet.

   4) Avoid a NULL deref if we try to set SO_REUSEPORT after a socket is
      bound, from Craig Gallek.

   5) GRO key comparisons don't take lightweight tunnels into account,
      from Jesse Gross.

   6) Fix struct pid leak via SCM credentials in AF_UNIX, from Eric
      Dumazet.

   7) We need to set the rtnl_link_ops of ipv6 SIT tunnels before we
      register them, otherwise the NEWLINK netlink message is missing
      the proper attributes.  From Thadeu Lima de Souza Cascardo.

   8) Several Spectrum chip bug fixes for mlxsw switch driver, from Ido
      Schimmel

   9) Handle fragments properly in ipv4 easly socket demux, from Eric
      Dumazet.

  10) Don't ignore the ifindex key specifier on ipv6 output route
      lookups, from Paolo Abeni"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (128 commits)
  tcp: avoid cwnd undo after receiving ECN
  irda: fix a potential use-after-free in ircomm_param_request
  net: tg3: avoid uninitialized variable warning
  net: nb8800: avoid uninitialized variable warning
  net: vxge: avoid unused function warnings
  net: bgmac: clarify CONFIG_BCMA dependency
  net: hp100: remove unnecessary #ifdefs
  net: davinci_cpdma: use dma_addr_t for DMA address
  ipv6/udp: use sticky pktinfo egress ifindex on connect()
  ipv6: enforce flowi6_oif usage in ip6_dst_lookup_tail()
  netlink: not trim skb for mmaped socket when dump
  vxlan: fix a out of bounds access in __vxlan_find_mac
  net: dsa: mv88e6xxx: fix port VLAN maps
  fib_trie: Fix shift by 32 in fib_table_lookup
  net: moxart: use correct accessors for DMA memory
  ipv4: ipconfig: avoid unused ic_proto_used symbol
  bnxt_en: Fix crash in bnxt_free_tx_skbs() during tx timeout.
  bnxt_en: Exclude rx_drop_pkts hw counter from the stack's rx_dropped counter.
  bnxt_en: Ring free response from close path should use completion ring
  net_sched: drr: check for NULL pointer in drr_dequeue
  ...
2016-02-01 15:56:08 -08:00
Linus Torvalds
2c923414d3 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

  API:
   - algif_hash needs to wait for init operations to complete.
   - The has_key setting for shash was always true.

  Algorithms:
   - Add missing selections of CRYPTO_HASH.
   - Fix pkcs7 authentication.

  Drivers:
   - Fix stack alignment bug in chacha20-ssse3.
   - Fix performance regression in caam due to incorrect setting.
   - Fix potential compile-only build failure of stm32"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: atmel-aes - remove calls of clk_prepare() from atomic contexts
  crypto: algif_hash - wait for crypto_ahash_init() to complete
  crypto: shash - Fix has_key setting
  hwrng: stm32 - Fix dependencies for !HAS_IOMEM archs
  crypto: ghash,poly1305 - select CRYPTO_HASH where needed
  crypto: chacha20-ssse3 - Align stack pointer to 64 bytes
  PKCS#7: Don't require SpcSpOpusInfo in Authenticode pkcs7 signatures
  crypto: caam - make write transactions bufferable on PPC platforms
2016-02-01 15:49:18 -08:00
Linus Torvalds
29a8ea4fbe Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
 "1/ Fixes to the libnvdimm 'pfn' device that establishes a reserved
     area for storing a struct page array.

  2/ Fixes for dax operations on a raw block device to prevent pagecache
     collisions with dax mappings.

  3/ A fix for pfn_t usage in vm_insert_mixed that lead to a null
     pointer de-reference.

  These have received build success notification from the kbuild robot
  across 153 configs and pass the latest ndctl tests"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  phys_to_pfn_t: use phys_addr_t
  mm: fix pfn_t to page conversion in vm_insert_mixed
  block: use DAX for partition table reads
  block: revert runtime dax control of the raw block device
  fs, block: force direct-I/O for dax-enabled block devices
  devm_memremap_pages: fix vmem_altmap lifetime + alignment handling
  libnvdimm, pfn: fix restoring memmap location
  libnvdimm: fix mode determination for e820 devices
2016-02-01 15:21:20 -08:00
Namhyung Kim
3848c23b19 perf report: Don't show blank lines if entry has no callchain
When all callchains of a hist entry is percent-limited, do not add a
blank line at the end.  It makes the entry look like it doesn't have
callchains.

Reported-and-Tested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20160128122454.GA27446@danjae.kornet
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:51:09 -03:00
Namhyung Kim
59c624e239 perf hists browser: Fix percent display in callchains
When there's only a single callchain, perf doesn't print its percentage
in front of the symbols.  This is because it assumes that the percentage
is same as parents.  But if a percent limit is applied, it's possible
that there are actually a couple of child nodes but only one of them is
shown.  In this case it should display the percent to prevent
misunderstanding of its percentage is same as the parent's.

For example, let's see the following callchain.

  $ perf report --no-children --percent-limit 0.01 --tui
  ...
  -    0.06%  sleep    [kernel.vmlinux]    [k] kmem_cache_alloc_trace
       kmem_cache_alloc_trace
     - perf_event_mmap
        - 0.04% mmap_region
             do_mmap_pgoff
           - vm_mmap_pgoff
              + 0.02% sys_mmap_pgoff
              + 0.02% vm_mmap
           + 0.02% mprotect_fixup

Current code omits the percent if 'mmap_region' becomes the only node
when percent limit is set to 0.03%, its percent is not 0.06% but users
will assume it incorrectly.

Before:

  $ perf report --no-children --percent-limit 0.03 --tui
  ...
     0.06%  sleep    [kernel.vmlinux]    [k] kmem_cache_alloc_trace
       kmem_cache_alloc_trace
     - perf_event_mmap
        - mmap_region
          do_mmap_pgoff
          vm_mmap_pgoff

After:

  $ perf report --no-children --percent-limit 0.03 --tui
  ...
     0.06%  sleep    [kernel.vmlinux]    [k] kmem_cache_alloc_trace
       kmem_cache_alloc_trace
     - perf_event_mmap
        - 0.04% mmap_region
             do_mmap_pgoff
             vm_mmap_pgoff

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-10-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:46:27 -03:00
Namhyung Kim
5eca104eee perf hists browser: Pass parent_total to callchain print functions
Pass parent node's total period to callchain print functions.  This info
is needed by later patch to determine whether it can omit percent or not
correctly.

No functional change intended.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-9-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:45:42 -03:00
Namhyung Kim
0c841c6c16 perf hists browser: Fix dump to show correct callchain style
The commit 8c430a3486 ("perf hists browser: Support folded
callchains") missed to update hist_browser__dump() so it always shows
graph-style callchains regardless of current setting.

To fix that, factor out callchain printing code and rename the existing
function which prints graph-style callchain.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 8c430a3486 ("perf hists browser: Support folded callchains")
Link: http://lkml.kernel.org/r/1453909257-26015-8-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:44:30 -03:00
Namhyung Kim
7ed5d6e28a perf report: Fix percent display in callchains on --stdio
When there's only a single callchain, perf doesn't print its percentage
in front of the symbols.  This is because it assumes that the percentage
is same as parents.  But if a percent limit is applied, it's possible
that there are actually a couple of child nodes but only one of them is
shown.  In this case it should display the percent to prevent
misunderstanding of its percentage is same as the parent's.

For example, let's see the following callchain.

  $ perf report -s comm --percent-limit 0.01 --stdio
  ...
     9.95%  swapper
            |
            |--7.57%--intel_idle
            |          cpuidle_enter_state
            |          cpuidle_enter
            |          call_cpuidle
            |          cpu_startup_entry
            |          |
            |          |--4.89%--start_secondary
            |          |
            |           --2.68%--rest_init
            |                     start_kernel
            |                     x86_64_start_reservations
            |                     x86_64_start_kernel
	    |
	    |--0.15%--__schedule
	    |          |
	    |          |--0.13%--schedule
	    |          |          schedule_preempt_disable
	    |          |          cpu_startup_entry
            |          |          |
            |          |          |--0.09%--start_secondary
            |          |          |
            |          |           --0.04%--rest_init
            |          |                     start_kernel
            |          |                     x86_64_start_reservations
            |          |                     x86_64_start_kernel
            |          |
            |           --0.01%--schedule_preempt_disabled
            |                     cpu_startup_entry
  ...

Current code omits the percent if 'intel_idle' becomes the only node
when percent limit is set to 0.5%, its percent is not 9.95% but users
will assume it incorrectly.

Before:

  $ perf report --percent-limit 0.5 --stdio
  ...
     9.95%  swapper
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--4.89%--start_secondary
               |
                --2.68%--rest_init
                          start_kernel
                          x86_64_start_reservations
                          x86_64_start_kernel

After:

  $ perf report --percent-limit 0.5 --stdio
  ...
     9.95%  swapper
            |
             --7.57%--intel_idle
                       cpuidle_enter_state
                       cpuidle_enter
                       call_cpuidle
                       cpu_startup_entry
                       |
                       |--4.89%--start_secondary
                       |
                        --2.68%--rest_init
                                  start_kernel
                                  x86_64_start_reservations
                                  x86_64_start_kernel

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:41:32 -03:00
Namhyung Kim
54d27b3119 perf callchain: Pass parent_samples to __callchain__fprintf_graph()
Pass hist entry's period to graph callchain print function.  This info
is needed by later patch to determine whether it can omit percentage of
top-level node or not.

No functional change intended.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:39:52 -03:00
Namhyung Kim
7e597d327e perf report: Get rid of hist_entry__callchain_fprintf()
It's just a wrapper function to align the start position ofcallchains to
'comm' of each thread if it's a first sort key.  But it doesn't not work
with tracepoint events and also with upcoming hierarchy view.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:20:31 -03:00
Namhyung Kim
2665b4528d perf report: Apply --percent-limit to callchains also
Currently --percent-limit option only works for hist entries.  However
it'd be better to have same effect to callchains as well

Requested-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 17:12:00 -03:00
Namhyung Kim
0f58474ec8 perf hists: Update hists' total period when adding entries
Currently the hist entry addition path doesn't update total_period of
hists and it's calculated during 'resort' path.  But the resort path
needs to know the total period before doing its job because it's used
for calculating percent limit of callchains in hist entries.

So this patch update the total period during the addition path.  It
makes the percent limit of callchains working (again).

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 16:45:44 -03:00
Namhyung Kim
744070e0e4 perf hists: Fix min callchain hits calculation
The total period should be get using hists__total_period() since it
takes filtered entries into account.  In addition, if callchain mode is
'fractal', the total period should be the entry's period.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1453909257-26015-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-01 16:42:31 -03:00
Linus Torvalds
36f90b0a2d Linux 4.5-rc2 2016-01-31 18:12:16 -08:00
Linus Torvalds
d784ef581b USB fixes for 4.5-rc2
Here are some small USB fixes and new device ids for 4.5-rc2.  Nothing
 major here, full details are in the shortlog, and all of these have been
 in linux-next successfully.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB driver fixes from Greg KH:
 "Here are some small USB fixes and new device ids for 4.5-rc2.  Nothing
  major here, full details are in the shortlog, and all of these have
  been in linux-next successfully"

* tag 'usb-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: option: fix Cinterion AHxx enumeration
  USB: mxu11x0: fix memory leak on usb_serial private data
  USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable
  USB: serial: option: Adding support for Telit LE922
  USB: serial: visor: fix crash on detecting device without write_urbs
  USB: visor: fix null-deref at probe
  USB: cp210x: add ID for IAI USB to RS485 adaptor
  usb: hub: do not clear BOS field during reset device
  cdc-acm:exclude Samsung phone 04e8:685d
  usb: cdc-acm: send zero packet for intel 7260 modem
  usb: cdc-acm: handle unlinked urb in acm read callback
2016-01-31 17:36:45 -08:00
Linus Torvalds
54e3f3e302 TTY/Serial fixes for 4.5-rc2
Here are some small tty/serial driver fixes for 4.5-rc2.
 
 They resolve a number of reported problems (the ioctl one specifically
 has been pointed out by numerous people) and one patch adds some new
 device ids for the 8250_pci driver.  All have been in linux-next
 successfully.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are some small tty/serial driver fixes for 4.5-rc2.

  They resolve a number of reported problems (the ioctl one specifically
  has been pointed out by numerous people) and one patch adds some new
  device ids for the 8250_pci driver.  All have been in linux-next
  successfully"

* tag 'tty-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_pci: Add Intel Broadwell ports
  staging/speakup: Use tty_ldisc_ref() for paste kworker
  n_tty: Fix unsafe reference to "other" ldisc
  tty: Fix unsafe ldisc reference via ioctl(TIOCGETD)
  tty: Retry failed reopen if tty teardown in-progress
  tty: Wait interruptibly for tty lock on reopen
2016-01-31 17:09:39 -08:00
Linus Torvalds
8c4e378e42 Staging fixes for 4.5-rc2
Here are some small staging driver fixes for 4.5-rc2.  One of them
 predated 4.4-final, but I missed that merge window due to the holliday.
 The others fix reported issues that have come up recently.  The tty
 change is needed for the speakup driver fix and has the ack of the tty
 driver maintainer as well, i.e. myself :)
 
 All have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging fixes from Greg KH:
 "Here are some small staging driver fixes for 4.5-rc2.

  One of them predated 4.4-final, but I missed that merge window due to
  the holliday.  The others fix reported issues that have come up
  recently.  The tty change is needed for the speakup driver fix and has
  the ack of the tty driver maintainer as well, i.e.  myself :)

  All have been in linux-next with no reported issues"

* tag 'staging-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  Staging: speakup: fix read scrolled-back VT
  Staging: speakup: Fix getting port information
  Revert "Staging: panel: usleep_range is preferred over udelay"
  iio: adis_buffer: Fix out-of-bounds memory access
2016-01-31 17:00:27 -08:00
Linus Torvalds
f3ca903fbb Driver core fix for 4.5-rc2
Here's a single driver core fix that resolves an issue a lot of users
 have been hitting for a while now.  It's been tested a lot and has been
 in linux-next successfully for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fix from Greg KH:
 "Here's a single driver core fix that resolves an issue a lot of users
  have been hitting for a while now.  It's been tested a lot and has
  been in linux-next successfully for a while"

* tag 'driver-core-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  base/platform: Fix platform drivers with no probe callback
2016-01-31 16:55:04 -08:00
Linus Torvalds
510ae0c994 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fix from Ralf Baechle:
 "Just a single revert for a patch which I had upstreamed out of
  sequence"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  Revert "MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function"
2016-01-31 16:50:31 -08:00
Linus Torvalds
d517be5fcf Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
 "A bit on the largish side due to a series of fixes for a regression in
  the x86 vector management which was introduced in 4.3.  This work was
  started in December already, but it took some time to fix all corner
  cases and a couple of older bugs in that area which were detected
  while at it

  Aside of that a few platform updates for intel-mid, quark and UV and
  two fixes for in the mm code:
   - Use proper types for pgprot values to avoid truncation
   - Prevent a size truncation in the pageattr code when setting page
     attributes for large mappings"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  x86/mm/pat: Avoid truncation when converting cpa->numpages to address
  x86/mm: Fix types used in pgprot cacheability flags translations
  x86/platform/quark: Print boundaries correctly
  x86/platform/UV: Remove EFI memmap quirk for UV2+
  x86/platform/intel-mid: Join string and fix SoC name
  x86/platform/intel-mid: Enable 64-bit build
  x86/irq: Plug vector cleanup race
  x86/irq: Call irq_force_move_complete with irq descriptor
  x86/irq: Remove outgoing CPU from vector cleanup mask
  x86/irq: Remove the cpumask allocation from send_cleanup_vector()
  x86/irq: Clear move_in_progress before sending cleanup IPI
  x86/irq: Remove offline cpus from vector cleanup
  x86/irq: Get rid of code duplication
  x86/irq: Copy vectormask instead of an AND operation
  x86/irq: Check vector allocation early
  x86/irq: Reorganize the search in assign_irq_vector
  x86/irq: Reorganize the return path in assign_irq_vector
  x86/irq: Do not use apic_chip_data.old_domain as temporary buffer
  x86/irq: Validate that irq descriptor is still active
  x86/irq: Fix a race in x86_vector_free_irqs()
  ...
2016-01-31 16:17:19 -08:00
Linus Torvalds
dc799d0179 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
 "The timer departement delivers:

   - a regression fix for the NTP code along with a proper selftest
   - prevent a spurious timer interrupt in the NOHZ lowres code
   - a fix for user space interfaces returning the remaining time on
     architectures with CONFIG_TIME_LOW_RES=y
   - a few patches to fix COMPILE_TEST fallout"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick/nohz: Set the correct expiry when switching to nohz/lowres mode
  clocksource: Fix dependencies for archs w/o HAS_IOMEM
  clocksource: Select CLKSRC_MMIO where needed
  tick/sched: Hide unused oneshot timer code
  kselftests: timers: Add adjtimex SETOFFSET validity tests
  ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO
  itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper
  posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper
  timerfd: Handle relative timers with CONFIG_TIME_LOW_RES proper
  hrtimer: Handle remaining time proper for TIME_LOW_RES
  clockevents/tcb_clksrc: Prevent disabling an already disabled clock
2016-01-31 15:49:06 -08:00
Linus Torvalds
7ab85d4a85 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
 "Three small fixes in the scheduler/core:

   - use after free in the numa code
   - crash in the numa init code
   - a simple spelling fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  pid: Fix spelling in comments
  sched/numa: Fix use-after-free bug in the task_numa_compare
  sched: Fix crash in sched_init_numa()
2016-01-31 15:44:04 -08:00
Linus Torvalds
29d14f0835 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
 "This is much bigger than typical fixes, but Peter found a category of
  races that spurred more fixes and more debugging enhancements.  Work
  started before the merge window, but got finished only now.

  Aside of that this contains the usual small fixes to perf and tools.
  Nothing particular exciting"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
  perf: Remove/simplify lockdep annotation
  perf: Synchronously clean up child events
  perf: Untangle 'owner' confusion
  perf: Add flags argument to perf_remove_from_context()
  perf: Clean up sync_child_event()
  perf: Robustify event->owner usage and SMP ordering
  perf: Fix STATE_EXIT usage
  perf: Update locking order
  perf: Remove __free_event()
  perf/bpf: Convert perf_event_array to use struct file
  perf: Fix NULL deref
  perf/x86: De-obfuscate code
  perf/x86: Fix uninitialized value usage
  perf: Fix race in perf_event_exit_task_context()
  perf: Fix orphan hole
  perf stat: Do not clean event's private stats
  perf hists: Fix HISTC_MEM_DCACHELINE width setting
  perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed
  perf tests: Remove wrong semicolon in while loop in CQM test
  perf: Synchronously free aux pages in case of allocation failure
  ...
2016-01-31 15:38:27 -08:00
Linus Torvalds
bbfb239a10 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Thomas Gleixner:
 "A single commit, which makes the rtmutex.wait_lock an irq safe lock.

  This prevents a potential deadlock which can be triggered by the rcu
  boosting code from rcu_read_unlock()"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rtmutex: Make wait_lock irq safe
2016-01-31 15:29:37 -08:00
Linus Torvalds
30e4c9ad04 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull IRQ fixes from Ingo Molnar:
 "Mostly irqchip driver fixes, but also an irq core crash fix and a
  build fix"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mxs: Add missing set_handle_irq()
  irqchip/atmel-aic: Fix wrong bit operation for IRQ priority
  irqchip/gic-v3-its: Recompute the number of pages on page size change
  base: Export platform_msi_domain_[alloc,free]_irqs
  of: MSI: Simplify irqdomain lookup
  irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED token
  irqchip: Fix dependencies for archs w/o HAS_IOMEM
  irqchip/s3c24xx: Mark init_eint as __maybe_unused
  genirq: Validate action before dereferencing it in handle_irq_event_percpu()
2016-01-31 14:48:58 -08:00
Linus Torvalds
f25a96eada Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull debugobjects fix from Ingo Molnar:
 "Bump up debugobjects pool limit that bigger s390 systems kept running
  into"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  debugobjects: Allow bigger number of early boot objects
2016-01-31 14:43:09 -08:00
Linus Torvalds
660f6fea42 VFIO fixes for v4.5-rc2
- Use alternate group tracking for no-iommu (Alex Williamson)
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Merge tag 'vfio-v4.5-rc2' of git://github.com/awilliam/linux-vfio

Pull VFIO fix from Alex Williamson:
 "Use alternate group tracking for no-iommu"

* tag 'vfio-v4.5-rc2' of git://github.com/awilliam/linux-vfio:
  vfio/noiommu: Don't use iommu_present() to track fake groups
2016-01-31 14:38:37 -08:00
Linus Torvalds
bb4768004b Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
 "Here are two I2C driver regression fixes.  piix4 gets a larger
  overhaul fixing the latest refactoring and also an older known issue
  as well.  designware-pci gets a fix for a bad merge conflict
  resolution"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: piix4: don't regress on bus names
  i2c: designware-pci: use IRQF_COND_SUSPEND flag
  i2c: piix4: Fully initialize SB800 before it is registered
  i2c: piix4: Fix SB800 locking
2016-01-31 14:29:52 -08:00
Dan Williams
76e9f0ee52 phys_to_pfn_t: use phys_addr_t
A dma_addr_t is potentially smaller than a phys_addr_t on some archs.
Don't truncate the address when doing the pfn conversion.

Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Matthew Wilcox <willy@linux.intel.com>
[willy: fix pfn_t_to_phys as well]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-31 09:10:19 -08:00
Dan Williams
03fc2da63b mm: fix pfn_t to page conversion in vm_insert_mixed
pfn_t_to_page() honors the flags in the pfn_t value to determine if a
pfn is backed by a page.  However, vm_insert_mixed() was originally
written to use pfn_valid() to make this determination.  To restore the
old/correct behavior, ignore the pfn_t flags in the !pfn_t_devmap() case
and fallback to trusting pfn_valid().

Fixes: 01c8f1c44b ("mm, dax, gpu: convert vm_insert_mixed to pfn_t")
Cc: Dave Hansen <dave@sr71.net>
Cc: David Airlie <airlied@linux.ie>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-31 09:07:15 -08:00
David S. Miller
53729eb174 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
Johan Hedberg says:

====================
pull request: bluetooth 2016-01-30

Here's a set of important Bluetooth fixes for the 4.5 kernel:

 - Two fixes to 6LoWPAN code (one fixing a potential crash)
 - Fix LE pairing with devices using both public and random addresses
 - Fix allocation of dynamic LE PSM values
 - Fix missing COMPATIBLE_IOCTL for UART line discipline

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-30 15:32:42 -08:00
Dan Williams
d1a5f2b4d8 block: use DAX for partition table reads
Avoid populating pagecache when the block device is in DAX mode.
Otherwise these page cache entries collide with the fsync/msync
implementation and break data durability guarantees.

Cc: Jan Kara <jack@suse.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-30 13:35:32 -08:00
Dan Williams
9f4736fe7c block: revert runtime dax control of the raw block device
Dynamically enabling DAX requires that the page cache first be flushed
and invalidated.  This must occur atomically with the change of DAX mode
otherwise we confuse the fsync/msync tracking and violate data
durability guarantees.  Eliminate the possibilty of DAX-disabled to
DAX-enabled transitions for now and revisit this for the next cycle.

Cc: Jan Kara <jack@suse.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-30 13:35:31 -08:00
Dan Williams
65f87ee718 fs, block: force direct-I/O for dax-enabled block devices
Similar to the file I/O path, re-direct all I/O to the DAX path for I/O
to a block-device special file.  Both regular files and device special
files can use the common filp->f_mapping->host lookup to determing is
DAX is enabled.

Otherwise, we confuse the DAX code that does not expect to find live
data in the page cache:

    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 7676 at mm/filemap.c:217
    __delete_from_page_cache+0x9f6/0xb60()
    Modules linked in:
    CPU: 0 PID: 7676 Comm: a.out Not tainted 4.4.0+ #276
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
     00000000ffffffff ffff88006d3f7738 ffffffff82999e2d 0000000000000000
     ffff8800620a0000 ffffffff86473d20 ffff88006d3f7778 ffffffff81352089
     ffffffff81658d36 ffffffff86473d20 00000000000000d9 ffffea0000009d60
    Call Trace:
     [<     inline     >] __dump_stack lib/dump_stack.c:15
     [<ffffffff82999e2d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50
     [<ffffffff81352089>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482
     [<ffffffff813522b9>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515
     [<ffffffff81658d36>] __delete_from_page_cache+0x9f6/0xb60 mm/filemap.c:217
     [<ffffffff81658fb2>] delete_from_page_cache+0x112/0x200 mm/filemap.c:244
     [<ffffffff818af369>] __dax_fault+0x859/0x1800 fs/dax.c:487
     [<ffffffff8186f4f6>] blkdev_dax_fault+0x26/0x30 fs/block_dev.c:1730
     [<     inline     >] wp_pfn_shared mm/memory.c:2208
     [<ffffffff816e9145>] do_wp_page+0xc85/0x14f0 mm/memory.c:2307
     [<     inline     >] handle_pte_fault mm/memory.c:3323
     [<     inline     >] __handle_mm_fault mm/memory.c:3417
     [<ffffffff816ecec3>] handle_mm_fault+0x2483/0x4640 mm/memory.c:3446
     [<ffffffff8127eff6>] __do_page_fault+0x376/0x960 arch/x86/mm/fault.c:1238
     [<ffffffff8127f738>] trace_do_page_fault+0xe8/0x420 arch/x86/mm/fault.c:1331
     [<ffffffff812705c4>] do_async_page_fault+0x14/0xd0 arch/x86/kernel/kvm.c:264
     [<ffffffff86338f78>] async_page_fault+0x28/0x30 arch/x86/entry/entry_64.S:986
     [<ffffffff86336c36>] entry_SYSCALL_64_fastpath+0x16/0x7a
    arch/x86/entry/entry_64.S:185
    ---[ end trace dae21e0f85f1f98c ]---

Fixes: 5a023cdba5 ("block: enable dax for raw block devices")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Kirill A. Shutemov <kirill@shutemov.name>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Suggested-by: Matthew Wilcox <willy@linux.intel.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-30 13:33:59 -08:00
Cyrille Pitchen
49a20454e0 crypto: atmel-aes - remove calls of clk_prepare() from atomic contexts
clk_prepare()/clk_unprepare() must not be called within atomic context.

This patch calls clk_prepare() once for all from atmel_aes_probe() and
clk_unprepare() from atmel_aes_remove().

Then calls of clk_prepare_enable()/clk_disable_unprepare() were replaced
by calls of clk_enable()/clk_disable().

Cc: stable@vger.kernel.org
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Reported-by: Matthias Mayr <matthias.mayr@student.kit.edu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-30 22:05:17 +08:00
Wang, Rui Y
fe09786178 crypto: algif_hash - wait for crypto_ahash_init() to complete
hash_sendmsg/sendpage() need to wait for the completion
of crypto_ahash_init() otherwise it can cause panic.

Cc: stable@vger.kernel.org
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-30 22:05:15 +08:00
Zhen Lei
840d6fe742 pid: Fix spelling in comments
Accidentally discovered this typo when I studied this module.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tianhong Ding <dingtianhong@huawei.com>
Cc: Xinwei Hu <huxinwei@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1454119457-11272-1-git-send-email-thunder.leizhen@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-30 09:28:18 +01:00
Ingo Molnar
28fb8a5b6e perf/urgent fixes:
User visible:
 
 - Fix 'perf stat' stddev reporting due to mistakenly cleaning event
   private stats (Jiri Olsa)
 
 - Fix 'perf test CQM' endless loop detected by 'gcc6 -Wmisleading-indentation'
   (Markus Trippelsdorf)
 
 - Fix behaviour of Shift-Tab when nothing is focussed in the annotate TUI browser,
   detected with gcc6 -Wmisleading-indentation (Markus Trippelsdorf)
 
 - Fix mem data cacheline hists browser width setting for unresolved
   addresses (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

 - Fix 'perf stat' stddev reporting due to mistakenly cleaning event
   private stats (Jiri Olsa)

 - Fix 'perf test CQM' endless loop detected by 'gcc6 -Wmisleading-indentation'
   (Markus Trippelsdorf)

 - Fix behaviour of Shift-Tab when nothing is focussed in the annotate TUI browser,
   detected with gcc6 -Wmisleading-indentation (Markus Trippelsdorf)

 - Fix mem data cacheline hists browser width setting for unresolved
   addresses (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-30 09:15:49 +01:00
Yuchung Cheng
99b4dd9f24 tcp: avoid cwnd undo after receiving ECN
RFC 4015 section 3.4 says the TCP sender MUST refrain from
reversing the congestion control state when the ACK signals
congestion through the ECN-Echo flag. Currently we may not
always do that when prior_ssthresh is reset upon receiving
ACKs with ECE marks. This patch fixes that.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 23:03:56 -08:00
WANG Cong
3d45296ab9 irda: fix a potential use-after-free in ircomm_param_request
self->ctrl_skb is protected by self->spinlock, we should not
access it out of the lock. Move the debugging printk inside.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 22:56:46 -08:00
Dan Williams
eb7d78c9e7 devm_memremap_pages: fix vmem_altmap lifetime + alignment handling
to_vmem_altmap() needs to return valid results until
arch_remove_memory() completes.  It also needs to be valid for any pfn
in a section regardless of whether that pfn maps to data.  This escape
was a result of a bug in the unit test.

The signature of this bug is that free_pagetable() fails to retrieve a
vmem_altmap and goes off into the weeds:

 BUG: unable to handle kernel NULL pointer dereference at           (null)
 IP: [<ffffffff811d2629>] get_pfnblock_flags_mask+0x49/0x60
 [..]
 Call Trace:
  [<ffffffff811d3477>] free_hot_cold_page+0x97/0x1d0
  [<ffffffff811d367a>] __free_pages+0x2a/0x40
  [<ffffffff8191e669>] free_pagetable+0x8c/0xd4
  [<ffffffff8191ef4e>] remove_pagetable+0x37a/0x808
  [<ffffffff8191b210>] vmemmap_free+0x10/0x20

Fixes: 4b94ffdc41 ("x86, mm: introduce vmem_altmap to augment vmemmap_populate()")
Cc: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-29 21:54:04 -08:00
David S. Miller
ae9d723e9f Merge branch 'arnd-net-driver-fixes'
Arnd Bergmann says:

====================
network driver fixes

This is an updated series of fixes for the network device drivers
that showed warnings in ARM randconfig.

Changes since v1 are:

dropped "net: macb: avoid uninitialized variables", already fixed in net-next

dropped "net: fddi/defxx: avoid warning about uninitialized variable
	use", already fixed in net-next

added missing barriers in "net: moxart: use correct accessors for
	DMA memory"

clarified "net: bgmac: clarify CONFIG_BCMA dependency" changelog
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 20:33:57 -08:00
Arnd Bergmann
e434e04110 net: tg3: avoid uninitialized variable warning
The tg3_set_eeprom() function correctly initializes the 'start' variable,
but gcc generates a false warning:

drivers/net/ethernet/broadcom/tg3.c: In function 'tg3_set_eeprom':
drivers/net/ethernet/broadcom/tg3.c:12057:4: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]

I have not come up with a way to restructure the code in a way that
avoids the warning without making it less readable, so this adds an
initialization for the declaration to shut up that warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 20:33:39 -08:00
Arnd Bergmann
8bdb290896 net: nb8800: avoid uninitialized variable warning
The nb8800_poll() function initializes the 'next' variable in the
loop looking for new input data. We know this will be called at
least once because 'budget' is a guaranteed to be a positive number
when we enter the function, but the compiler doesn't know that
and warns when the variable is used later:

drivers/net/ethernet/aurora/nb8800.c: In function 'nb8800_poll':
drivers/net/ethernet/aurora/nb8800.c:350:21: warning: 'next' may be used uninitialized in this function [-Wmaybe-uninitialized]

Changing the 'while() {}' loop to 'do {} while()' makes it obvious
to the compiler what is going on so it no longer warns.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 20:33:39 -08:00
Arnd Bergmann
57e7c8cef2 net: vxge: avoid unused function warnings
When CONFIG_PCI_MSI is disabled, we get warnings about unused functions
in the vxge driver:

drivers/net/ethernet/neterion/vxge/vxge-main.c:2121:13: warning: 'adaptive_coalesce_tx_interrupts' defined but not used [-Wunused-function]
drivers/net/ethernet/neterion/vxge/vxge-main.c:2149:13: warning: 'adaptive_coalesce_rx_interrupts' defined but not used [-Wunused-function]

We could add another #ifdef here, but it's nicer to avoid those warnings
for good by converting the existing #ifdef to if(IS_ENABLED()), which has
the same effect but provides better compile-time coverage in general,
and lets the compiler understand better when the function is intentionally
unused.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 20:33:39 -08:00
Arnd Bergmann
1f820f538f net: bgmac: clarify CONFIG_BCMA dependency
The bgmac driver depends on BCMA_HOST_SOC, which is only used
when CONFIG_BCMA is enabled. However, it is a bool option and can
be set when CONFIG_BCMA=m, and then bgmac can be built-in, leading
to an obvious link error:

drivers/built-in.o: In function `bgmac_init':
:(.init.text+0x7f2c): undefined reference to `__bcma_driver_register'
drivers/built-in.o: In function `bgmac_exit':
:(.exit.text+0x110a): undefined reference to `bcma_driver_unregister'

To avoid this case, we need to depend on both BCMA and BCMA_SOC,
as this patch does. I'm also trying to make the dependency more
readable by splitting it into three lines, and adding a COMPILE_TEST
alternative so we can test-build it in all configurations that
support BCMA.

The added dependency on FIXED_PHY addresses a related issue where
we cannot call fixed_phy_register() when CONFIG_FIXED_PHY=m and
CONFIG_BGMAC=y.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-29 20:33:38 -08:00