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locking, rwsem: Annotate inner lock as raw

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There is no reason to allow the lock protecting rwsems (the
ownerless variant) to be preemptible on -rt. Convert it to raw.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2010-02-24 09:54:54 +01:00
committed by Ingo Molnar
parent 8292c9e15c
commit ddb6c9b58a
4 changed files with 33 additions and 31 deletions
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2
include/linux/rwsem-spinlock.h
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@@ -22,7 +22,7 @@
*/
struct rw_semaphore {
__s32 activity;
spinlock_t wait_lock;
raw_spinlock_t wait_lock;
struct list_head wait_list;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;