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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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2
include/linux/spinlock_api_up.h
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@ -16,7 +16,7 @@
#define in_lock_functions(ADDR) 0
#define assert_spin_locked(lock) do { (void)(lock); } while (0)
#define assert_raw_spin_locked(lock) do { (void)(lock); } while (0)
/*
* In the UP-nondebug case there's no real locking going on, so the