linux

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Kajol Jain 6d6b8b9f4f perf: Fix task_function_call() error handling

The error handling introduced by commit:

  2ed6edd33a ("perf: Add cond_resched() to task_function_call()")

looses any return value from smp_call_function_single() that is not
{0, -EINVAL}. This is a problem because it will return -EXNIO when the
target CPU is offline. Worse, in that case it'll turn into an infinite
loop.

Fixes: 2ed6edd33a ("perf: Add cond_resched() to task_function_call()")
Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Barret Rhoden <brho@google.com>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: https://lkml.kernel.org/r/20200827064732.20860-1-kjain@linux.ibm.com

2020-10-09 08:18:33 +02:00

callchain.c

uaccess: add force_uaccess_{begin,end} helpers

2020-08-12 10:57:59 -07:00

core.c

perf: Fix task_function_call() error handling

2020-10-09 08:18:33 +02:00

hw_breakpoint.c

powerpc/watchpoint: Don't allow concurrent perf and ptrace events

2020-05-19 00:14:45 +10:00

internal.h

perf/core: Replace zero-length array with flexible-array