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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-09-16 19:17:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-09-21 13:55:44 +0200 |
| commit | 41945f6ccf1e86f87fddf6b32db9cf431c05fb54 (patch) | |
| tree | cf64d47bfff06ff4560efcaa23a067fa99db34dd /arch/x86 | |
| parent | percpu: Add {get,put}_cpu_ptr (diff) | |
| download | linux-41945f6ccf1e86f87fddf6b32db9cf431c05fb54.tar.xz linux-41945f6ccf1e86f87fddf6b32db9cf431c05fb54.zip | |
perf: Avoid RCU vs preemption assumptions
The per-pmu per-cpu context patch converted things from
get_cpu_var() to this_cpu_ptr(), but that only works if
rcu_read_lock() actually disables preemption, and since
there is no such guarantee, we need to fix that.
Use the newly introduced {get,put}_cpu_ptr().
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tejun Heo <tj@kernel.org>
LKML-Reference: <20100917093009.308453028@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions