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locking: Implement new raw_spinlock

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Now that the raw_spin name space is freed up, we can implement
raw_spinlock and the related functions which are used to annotate the
locks which are not converted to sleeping spinlocks in preempt-rt.

A side effect is that only such locks can be used with the low level
lock fsunctions which circumvent lockdep.

For !rt spin_* functions are mapped to the raw_spin* implementations.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2009-12-02 20:02:59 +01:00
parent e5931943d0
commit c2f21ce2e3
8 changed files with 297 additions and 135 deletions
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12
kernel/mutex-debug.h
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@ -43,13 +43,13 @@ static inline void mutex_clear_owner(struct mutex *lock)
\
DEBUG_LOCKS_WARN_ON(in_interrupt()); \
local_irq_save(flags); \
arch_spin_lock(&(lock)->raw_lock); \
arch_spin_lock(&(lock)->rlock.raw_lock);\
DEBUG_LOCKS_WARN_ON(l->magic != l); \
} while (0)
#define spin_unlock_mutex(lock, flags) \
do { \
arch_spin_unlock(&(lock)->raw_lock); \
local_irq_restore(flags); \
preempt_check_resched(); \
#define spin_unlock_mutex(lock, flags) \
do { \
arch_spin_unlock(&(lock)->rlock.raw_lock); \
local_irq_restore(flags); \
preempt_check_resched(); \
} while (0)