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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-25 07:40:09 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-25 08:16:01 (GMT) |
| commit | 2d542cf34264ac92e9e7ac55c0b096b066d569d2 (patch) | |
| tree | e7864da3a119ba2fd1800616f0041610d09058cb /mm/page_io.c | |
| parent | 499aa86dcbc3c4daf7d2c59c5c30e1a78220fbc1 (diff) | |
| download | linux-2d542cf34264ac92e9e7ac55c0b096b066d569d2.tar.xz | |
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 'mm/page_io.c')
0 files changed, 0 insertions, 0 deletions