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perf: Drop unappropriate tests on arch callchains

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Drop the TASK_RUNNING test on user tasks for callchains as
this check doesn't seem to make any sense.

Also remove the tests for !current that is not supposed to
happen and current->pid as this should be handled at the
generic level, with exclude_idle attribute.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Borislav Petkov <bp@amd64.org>
This commit is contained in:
Frederic Weisbecker 2010-06-29 18:08:13 +02:00
parent 4694153c25
commit c1a65932fd
3 changed files with 0 additions and 12 deletions
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6
arch/arm/kernel/perf_event.c
View File

@ -3107,12 +3107,6 @@ perf_do_callchain(struct pt_regs *regs,
is_user = user_mode(regs);
if (!current || !current->pid)
return;
if (is_user && current->state != TASK_RUNNING)
return;
if (!is_user)
perf_callchain_kernel(regs, entry);

3
arch/sh/kernel/perf_callchain.c
View File

@ -68,9 +68,6 @@ perf_do_callchain(struct pt_regs *regs, struct perf_callchain_entry *entry)
is_user = user_mode(regs);
if (is_user && current->state != TASK_RUNNING)
return;
/*
* Only the kernel side is implemented for now.
*/

3
arch/x86/kernel/cpu/perf_event.c
View File

@ -1703,9 +1703,6 @@ perf_do_callchain(struct pt_regs *regs, struct perf_callchain_entry *entry)
is_user = user_mode(regs);
if (is_user && current->state != TASK_RUNNING)
return;
if (!is_user)
perf_callchain_kernel(regs, entry);