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67cb85fdce
linux-next/arch/ia64/kernel
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Thomas Gleixner 67cb85fdce ia64/salinfo: Replace racy task affinity logic 
Some of the file operations in /proc/sal require to run code on the
requested cpu. This is achieved by temporarily setting the affinity of the
calling user space thread to the requested CPU and reset it to the original
affinity afterwards.

That's racy vs. CPU hotplug and concurrent affinity settings for that
thread resulting in code executing on the wrong CPU and overwriting the
new affinity setting.

Replace it by using work_on_cpu_safe() which guarantees to run the code on
the requested CPU or to fail in case the CPU is offline.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-ia64@vger.kernel.org
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/20170412201042.341863457@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-04-15 12:20:53 +02:00
..
.gitignore
acpi-ext.c ACPICA: Resources: Provide common part for struct acpi_resource_address structures. 2015-01-26 16:09:56 +01:00
acpi.c x86/ACPI: keep x86_cpu_to_acpiid mapping valid on CPU hotplug 2017-02-07 13:34:56 +01:00
asm-offsets.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
audit.c [IA64] Remove COMPAT_IA32 support 2010-02-08 10:42:17 -08:00
brl_emu.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
crash_dump.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
crash.c ia64: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:15 -07:00
cyclone.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
dma-mapping.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
efi_stub.S
efi.c ia64: efi: use timespec64 for persistent clock 2016-06-17 13:45:05 -07:00
elfcore.c switch elf_core_write_extra_data() to dump_emit() 2013-11-09 00:16:23 -05:00
entry.h
entry.S sched/core: Remove unused prefetch_stack() 2017-03-03 01:45:38 +01:00
err_inject.c ia64/err-inject: Convert to hotplug state machine 2016-11-09 23:45:29 +01:00
esi_stub.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
esi.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
fsys.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
fsyscall_gtod_data.h clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
ftrace.c ia64: ftrace: Fix the comments for ftrace_modify_code() 2015-12-23 14:27:23 -05:00
gate-data.S Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
gate.lds.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
gate.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
head.S ia64: Convert vtime to use nsec units directly 2017-02-01 09:14:02 +01:00
ia64_ksyms.c ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
init_task.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
iosapic.c ia64: rename nop->iosapic_nop 2016-01-12 20:46:47 +02:00
irq_ia64.c ia64: remove deprecated cpus_ usage. 2015-03-10 13:54:38 +10:30
irq_lsapic.c ia64: Convert lsapic to new irq_chip functions 2011-03-29 14:48:02 +02:00
irq.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
ivt.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
jprobes.S
kprobes.c ia64: ensure exception table search users include extable.h 2017-01-24 12:41:45 -05:00
machine_kexec.c kdump: arrange for paddr_vmcoreinfo_note() to return phys_addr_t 2016-08-02 19:35:27 -04:00
machvec.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
Makefile ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
Makefile.gate Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
mca_asm.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
mca_drv_asm.S
mca_drv.c Remove cast for kmalloc return value 2013-03-19 16:14:53 -07:00
mca_drv.h
mca.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h> 2017-03-02 08:42:35 +01:00
minstate.h ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
msi_ia64.c ia64/irq: Use access helper irq_data_get_affinity_mask() 2015-07-27 13:36:37 +02:00
nr-irqs.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
numa.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
pal.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
palinfo.c ia64/palinfo: Convert to hotplug state machine 2016-11-09 23:45:30 +01:00
patch.c ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
pci-dma.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
pci-swiotlb.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
perfmon_default_smpl.c Fix common misspellings 2011-03-31 11:26:23 -03:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h
perfmon_montecito.h
perfmon.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
process.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
ptrace.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
relocate_kernel.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
sal.c
salinfo.c ia64/salinfo: Replace racy task affinity logic 2017-04-15 12:20:53 +02:00
setup.c sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
sigframe.h
signal.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
smp.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
smpboot.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c [IA64] Add CONFIG_STACKTRACE_SUPPORT 2010-09-23 13:52:07 -07:00
sys_ia64.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
time.c sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h> 2017-03-02 08:42:39 +01:00
topology.c ia64/topology: Remove cpus_allowed manipulation 2017-04-15 12:20:52 +02:00
traps.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
unaligned.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
uncached.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h> 2017-03-02 08:42:30 +01:00
unwind_decoder.c
unwind_i.h
unwind.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00