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[IA64] Fix 64-bit atomic routines to return "long" 

These have been broken (returning "int") since the dawn of
time. But there were no users that needed the whole value
until commit
 424acaaeb3
 rwsem: wake queued readers when writer blocks on active read lock

made this change:

-           (rwsem_atomic_update(0, sem) & RWSEM_ACTIVE_MASK))
-               /* Someone grabbed the sem already */
+           rwsem_atomic_update(0, sem) < RWSEM_WAITING_BIAS)
+               /* Someone grabbed the sem for write already */

RWSEM_ACTIVE_MASK is 0xffffffffL, so the old code only looked
at the low order 32-bits. The new code needs to see all 64 bits.

Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Tony Luck 2010-08-13 16:41:07 -07:00
parent ad41a1e0ca
commit 01d69a82e1
1 changed files with 4 additions and 4 deletions
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8
arch/ia64/include/asm/atomic.h
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@ -41,7 +41,7 @@ ia64_atomic_add (int i, atomic_t *v)
return new;
}
static __inline__ int
static __inline__ long
ia64_atomic64_add (__s64 i, atomic64_t *v)
{
__s64 old, new;
@ -69,7 +69,7 @@ ia64_atomic_sub (int i, atomic_t *v)
return new;
}
static __inline__ int
static __inline__ long
ia64_atomic64_sub (__s64 i, atomic64_t *v)
{
__s64 old, new;
@ -107,7 +107,7 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
static __inline__ long atomic64_add_unless(atomic64_t *v, long a, long u)
{
long c, old;
c = atomic64_read(v);
@ -158,7 +158,7 @@ atomic_add_negative (int i, atomic_t *v)
return atomic_add_return(i, v) < 0;
}
static __inline__ int
static __inline__ long
atomic64_add_negative (__s64 i, atomic64_t *v)
{
return atomic64_add_return(i, v) < 0;