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| author | Thomas Gleixner <tglx@linutronix.de> | 2016-11-30 21:04:45 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-12-02 11:13:57 +0100 |
| commit | 84d82ec5b9046ecdf16031d3e93a66ef50257402 (patch) | |
| tree | 716c8ca677edf6cc92677f7a647cdd9bfa641af9 /arch/x86/kernel/paravirt_patch_32.c | |
| parent | b5016e8203003c44264ec88fe2276ff54a51f689 (diff) | |
| download | talos-op-linux-84d82ec5b9046ecdf16031d3e93a66ef50257402.tar.gz talos-op-linux-84d82ec5b9046ecdf16031d3e93a66ef50257402.zip | |
locking/rtmutex: Explain locking rules for rt_mutex_proxy_unlock()/init_proxy_locked()
While debugging the unlock vs. dequeue race which resulted in state
corruption of futexes the lockless nature of rt_mutex_proxy_unlock()
caused some confusion.
Add commentry to explain why it is safe to do this lockless. Add matching
comments to rt_mutex_init_proxy_locked() for completeness sake.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/r/20161130210030.591941927@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/paravirt_patch_32.c')
0 files changed, 0 insertions, 0 deletions
