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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-25 08:40:09 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-25 09:16:01 +0100 |
| commit | 2d542cf34264ac92e9e7ac55c0b096b066d569d2 (patch) | |
| tree | e7864da3a119ba2fd1800616f0041610d09058cb /drivers | |
| parent | x86, ptrace: remove CONFIG guards around declarations (diff) | |
| download | linux-2d542cf34264ac92e9e7ac55c0b096b066d569d2.tar.xz linux-2d542cf34264ac92e9e7ac55c0b096b066d569d2.zip | |
tracing/hw-branch-tracing: convert bts-tracer mutex to a spinlock
Impact: fix CPU hotplug lockup
bts_hotcpu_handler() is called with irqs disabled, so using mutex_lock()
is a no-no.
All the BTS codepaths here are atomic (they do not schedule), so using
a spinlock is the right solution.
Cc: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions