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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2011-09-07 13:00:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-09-07 13:00:11 -0700 |
| commit | b0fb422281c8c09c8dcf03ca44ec343f0ff9df0b (patch) | |
| tree | 85866700657ec97d8eae343146dd61519771f699 /arch | |
| parent | Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6 and git://git.infradead.org/ubi-2.6 (diff) | |
| parent | x86, perf: Check that current->mm is alive before getting user callchain (diff) | |
| download | linux-dev-b0fb422281c8c09c8dcf03ca44ec343f0ff9df0b.tar.xz linux-dev-b0fb422281c8c09c8dcf03ca44ec343f0ff9df0b.zip | |
Merge branch 'perf-fixes-for-linus' of git://tesla.tglx.de/git/linux-2.6-tip
* 'perf-fixes-for-linus' of git://tesla.tglx.de/git/linux-2.6-tip:
x86, perf: Check that current->mm is alive before getting user callchain
perf_event: Fix broken calc_timer_values()
perf events: Fix slow and broken cgroup context switch code
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 4ee3abf20ed6..cfa62ec090ec 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1900,6 +1900,9 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) perf_callchain_store(entry, regs->ip); + if (!current->mm) + return; + if (perf_callchain_user32(regs, entry)) return; |