Commit d3cb4871 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

[PATCH] atomic_long_t & include/asm-generic/atomic.h V2 



Several counters already have the need to use 64 atomic variables on 64 bit
platforms (see mm_counter_t in sched.h).  We have to do ugly ifdefs to fall
back to 32 bit atomic on 32 bit platforms.

The VM statistics patch that I am working on will also make more extensive
use of atomic64.

This patch introduces a new type atomic_long_t by providing definitions in
asm-generic/atomic.h that works similar to the c "long" type.  Its 32 bits
on 32 bit platforms and 64 bits on 64 bit platforms.

Also cleans up the determination of the mm_counter_t in sched.h.

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 070f8032

include/asm-alpha/atomic.h

+1 −0
Original line number Diff line number Diff line
@@ -216,4 +216,5 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v) 
#define smp_mb__before_atomic_inc()	smp_mb()

#define smp_mb__after_atomic_inc()	smp_mb()



#include <asm-generic/atomic.h>

#endif /* _ALPHA_ATOMIC_H */

include/asm-arm/atomic.h

+1 −0
Original line number Diff line number Diff line
@@ -205,5 +205,6 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) 
#define smp_mb__before_atomic_inc()	barrier()

#define smp_mb__after_atomic_inc()	barrier()



#include <asm-generic/atomic.h>

#endif

#endif

include/asm-arm26/atomic.h

+1 −0
Original line number Diff line number Diff line
@@ -118,5 +118,6 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) 
#define smp_mb__before_atomic_inc()	barrier()

#define smp_mb__after_atomic_inc()	barrier()



#include <asm-generic/atomic.h>

#endif

#endif

include/asm-cris/atomic.h

+1 −0
Original line number Diff line number Diff line
@@ -156,4 +156,5 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) 
#define smp_mb__before_atomic_inc()    barrier()

#define smp_mb__after_atomic_inc()     barrier()



#include <asm-generic/atomic.h>

#endif

include/asm-frv/atomic.h

+1 −0
Original line number Diff line number Diff line
@@ -426,4 +426,5 @@ extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new); 
})

#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)



#include <asm-generic/atomic.h>

#endif /* _ASM_ATOMIC_H */

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