Back in January 2008 Nick Piggin implemented "ticket" spinlocks
for X86 (See commit 314cdbefd1).
IA64 implementation has a couple of differences because of the
available atomic operations ... e.g. we have no fetchadd2 instruction
that operates on a 16-bit quantity so we make ticket locks use
a 32-bit word for each of the current ticket and now-serving values.
Performance on uncontended locks is about 8% worse than the previous
implementation, but this seems a good trade for determinism in the
contended case. Performance impact on macro-level benchmarks is in
the noise.
Signed-off-by: Tony Luck <tony.luck@intel.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh_mobile_ceu_camera: fix compile breakage, caused by a bad merge
sh: Add support DMA Engine to SH7780
sh: Add support DMA Engine to SH7722
sh: enable onenand support in kfr2r09 defconfig.
sh: update defconfigs.
sh: add FSI driver support for ms7724se
sh: Fix up uninitialized variable use caught by gcc 4.4.
sh: Handle unaligned 16-bit instructions on SH-2A.
sh: mach-ecovec24: Add active low setting for sh_eth
sh: includecheck fix: dwarf.c
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (94 commits)
genetlink: fix netns vs. netlink table locking (2)
3c59x: Get rid of "Trying to free already-free IRQ"
tunnel: eliminate recursion field
ems_pci: fix size of CAN controllers BAR mapping for CPC-PCI v2
net: fix htmldocs sunrpc, clnt.c
Phonet: error on broadcast sending (unimplemented)
Phonet: fix race for port number in concurrent bind()
pktgen: better scheduler friendliness
pktgen: T_TERMINATE flag is unused
ipv4: check optlen for IP_MULTICAST_IF option
ath9k: Initialize txgain and rxgain for newer AR9287 chipsets.
iwlagn: fix panic in iwl{5000,4965}_rx_reply_tx
ath9k: Fix RFKILL bugs
drivers/net/wireless: Use usb_endpoint_dir_out
cfg80211: don't overwrite privacy setting
wl12xx: fix kconfig/link errors
rt2x00: fix the definition of rt2x00crypto_rx_insert_iv
iwlwifi: reduce noise when skb allocation fails
iwlwifi: do not send sync command while holding spinlock
mac80211: fix DTIM setting
...
This patch adds support for the watchdog timer on Avionic Design Xanthos
boards.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
this avoids reading back the IB on AGP, also it avoids
the race where since we haven't fetched the page from the main IB
and written it to the gpu one, reading back fetches 0.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Got lots of untracked files after compiling.
These files are generated, thus should be ignored by git.
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
[note this requires an fb patch posted to linux-fbdev-devel already]
This uses the normal video= command line option to control the kms
output setup at boot time. It is used to override the autodetection
done by kms.
video= normally takes a framebuffer as the first parameter, in kms
it will take a connector name, DVI-I-1, or LVDS-1 etc. If no output
connector is specified the mode string will apply to all connectors.
The mode specification used will match down the probed modes, and if
no mode is found it will add a CVT mode that matches.
video=1024x768 - all connectors match a 1024x768 mode or add a CVT on
video=VGA-1:1024x768, VGA-1 connector gets mode only.
The same strings as used in current fb modedb.c are used, except I've
added three more letters, e, D, d, e = enable, D = enable Digital,
d = disable, which allow a connector to be forced into a certain state.
Signed-off-by: Dave Airlie <airlied@redhat.com>
This avoids needing to do a kmalloc > PAGE_SIZE for the main
indirect buffer chunk, it adds an accessor for all reads from
the chunk and caches a single page at a time for subsequent
reads.
changes since v1:
Use a two page pool which should be the most common case
a single packet spanning > PAGE_SIZE will be hit, but I'm
having trouble seeing anywhere we currently generate anything like that.
hopefully proper short page copying at end
added parser_error flag to set deep errors instead of having to test
every ib value fetch.
fixed bug in patch that went to list.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev:
m32r: Cleanup linker script using new linker script macros.
m32r: Move the spi_stack_top and spu_stack_top into .init.data section.
m32r: Remove unused .altinstructions and .exit.* code from linker script.
m32r: Move GET_THREAD_INFO definition out of asm/thread_info.h.
m32r: Define THREAD_SIZE only once.
m32r: make PAGE_SIZE available to assembly.
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
Fix build of cpm_uart due to core changes
powerpc/8xx: Fix regression introduced by cache coherency rewrite
powerpc/4xx: Fix erroneous xmon warning on PowerPC 4xx
powerpc/mm: Fix 40x and 8xx vs. _PAGE_SPECIAL
powerpc: Cleanup linker script using new linker script macros.
powerpc: Fix ibm,client-architecture-support printout
powerpc: Increase NODES_SHIFT on 64bit from 4 to 8
powerpc/perf_counter: Fix vdso detection
powerpc: Move 64bit heap above 1TB on machines with 1TB segments
powerpc: Change archdata dma_data to a union
powerpc: Rename get_dma_direct_offset get_dma_offset
powerpc/mm: Remove duplicated #include
powerpc/book3e-64: Remove duplicated #include
powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE
powerpc/pmc: Don't access lppaca on Book3E
powerpc: kmalloc failure ignored in vio_build_iommu_table()
hvc_console: Provide (un)locked version for hvc_resize()
Ignore the address parameter given to NOMMU mmap() as it is a hint, rather
than giving an error if it's non-zero. MAP_FIXED still gets an error.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The NOMMU fallback for is_vmalloc_or_module_addr() should be static inline,
not just static, in linux/mm.h.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix MAP_PRIVATE mmap() of files and devices where the data in the backing store
might be mapped directly. Use the BDI_CAP_MAP_DIRECT capability flag to govern
whether or not we should be trying to map a file directly. This can be used to
determine whether or not a region has been filled in at the point where we call
do_mmap_shared() or do_mmap_private().
The BDI_CAP_MAP_DIRECT capability flag is cleared by validate_mmap_request() if
there's any reason we can't use it. It's also cleared in do_mmap_pgoff() if
f_op->get_unmapped_area() fails.
Without this fix, attempting to run a program from a RomFS image on a
non-mappable MTD partition results in a BUG as the kernel attempts XIP, and
this can be caught in gdb:
Program received signal SIGABRT, Aborted.
0xc005dce8 in add_nommu_region (region=<value optimized out>) at mm/nommu.c:547
(gdb) bt
#0 0xc005dce8 in add_nommu_region (region=<value optimized out>) at mm/nommu.c:547
#1 0xc005f168 in do_mmap_pgoff (file=0xc31a6620, addr=<value optimized out>, len=3808, prot=3, flags=6146, pgoff=0) at mm/nommu.c:1373
#2 0xc00a96b8 in elf_fdpic_map_file (params=0xc33fbbec, file=0xc31a6620, mm=0xc31bef60, what=0xc0213144 "executable") at mm.h:1145
#3 0xc00aa8b4 in load_elf_fdpic_binary (bprm=0xc316cb00, regs=<value optimized out>) at fs/binfmt_elf_fdpic.c:343
#4 0xc006b588 in search_binary_handler (bprm=0x6, regs=0xc33fbce0) at fs/exec.c:1234
#5 0xc006c648 in do_execve (filename=<value optimized out>, argv=0xc3ad14cc, envp=0xc3ad1460, regs=0xc33fbce0) at fs/exec.c:1356
#6 0xc0008cf0 in sys_execve (name=<value optimized out>, argv=0xc3ad14cc, envp=0xc3ad1460) at arch/frv/kernel/process.c:263
#7 0xc00075dc in __syscall_call () at arch/frv/kernel/entry.S:897
Note that this fix does the following commit differently:
commit a190887b58
Author: David Howells <dhowells@redhat.com>
Date: Sat Sep 5 11:17:07 2009 -0700
nommu: fix error handling in do_mmap_pgoff()
Reported-by: Graff Yang <graff.yang@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Flash mappings for the MB93090-MB00 evaluation motherboard.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Note that .data.page_aligned and .data.cacheline_aligned are now after
_data; it was probably a bug that they were before it.
Also, some explicit ALIGN(8)'s between various initcall sections were
removed; this should be harmless as the implicit alignment of
initcall_t was already 8.
Signed-off-by: Geoffrey Thomas <geofft@ksplice.com>
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alpha is the only architecture that uses the section name
.data.init_thread instead of .data.init_task. So convert alpha to use
.data.init_task like everything else.
.data.init_task does not need a separate output section; this change
also moves it into the .data output section.
Signed-off-by: Tim Abbott <tabbott@mit.edu>
Cc: Richard Henderson <rth@twiddle.net>
Cc: linux-alpha@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch has the (likely harmless) side effect of moving
.data.init_task inside the _edata.
It also changes the alignment of .data.init_task from 16384 to
THREAD_SIZE, which can in some configurations be larger than 16384. I
believe that this change fixes a potential bug on those
configurations.
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The old RW_DATA_SECTION had INIT_TASK_DATA (which was
more-than-PAGE_SIZE-aligned), followed by a bunch of small alignment
stuff, followed by more PAGE_SIZE-aligned stuff, so you wasted memory
in the middle of .data re-aligning back up to PAGE_SIZE.
This patch sorts the sections by alignment requirements, which should
pack them essentially optimally.
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Why macros are always wrong:
mm/mmap.c: In function 'do_mmap_pgoff':
mm/mmap.c:953: warning: unused variable 'user'
also, move a couple of struct forward-decls outside `#ifdef
CONFIG_HUGETLB_PAGE' - it's pointless and frequently harmful to make these
conditional (eg, this patch needed `struct user_struct').
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: Eric B Munson <ebmunson@us.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://repo.or.cz/cris-mirror:
CRIS: Cleanup linker script using new linker script macros.
ARRAY_SIZE changes
CRIS: convert to asm-generic/hardirq.h
CRISv10: Don't autonegotiate if autonegotiation is off
CRIS: fix defconfig build failure
CRIS: add pgprot_noncached
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (103 commits)
ARM: 5719/1: [AT91] Fix AC97 breakage
ARM: 5721/1: MMCI enable the use of a regulator
ARM: 5720/1: Move MMCI header to amba include dir
ARM: 5718/1: Sane busids for RealView board components
ARM: 5715/1: Make kprobes unregistration SMP safe
ARM: 5711/1: locomo.c: CodingStyle cleanups
ARM: 5710/1: at91: add AC97 support to at91sam9rl and at91sam9rlek board
ARM: 5709/1: at91: add AC97 support to at91sam9g45 series and at91sam9m10g45ek board
ARM: 5621/1: at91/dmaengine: integration of at_hdmac driver in at91sam9g45 series
ARM: 5620/1: at91/dmaengine: integration of at_hdmac driver in at91sam9rl
ARM: Add support for checking access permissions on prefetch aborts
ARM: Separate out access error checking
ARM: Ensure correct might_sleep() check in pagefault path
ARM: Update page fault handling for new OOM techniques
ARM: Provide definitions and helpers for decoding the FSR register
ARM: 5712/1: SA1100: initialise spinlock in DMA code
ARM: s3c: fix check of index into s3c_gpios[]
ARM: spitz: fix touchscreen max presure
ARM: STMP3xxx: deallocation with negative index of descriptors[]
Thumb-2: Correctly handle undefined instructions in the kernel
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IPoIB: Don't turn on carrier for a non-active port
IB/mthca: Fix access to freed memory in catastrophic event handling
mlx4_core: Pass cache line size to device FW
RDMA/nes: Remove duplicate .ndo_set_mac_address field initialization
IB/mad: Fix lock-lock-timer deadlock in RMPP code
Use the resource_size function instead of manually calculating the
resource size. This reduces the chance of introducing off-by-one-errors.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Earlier BeagleBoards were using pad AH8 muxed to GPIO29 for MMC write-protect.
However, this signal has been changed to pad AG9 in board revision C2.
Fix this by adding mux configuration for pad AG9, runtime check for board
revisions and set the gpio number and pad muxing accordingly.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
