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x86: simplify sync_test_bit()

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There really is no need for a redundant implementation here, just keep
the alternative name for allowing consumers to use consistent naming.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich 2008-03-14 07:56:32 +00:00 committed by Ingo Molnar
parent acb5b8a2dd
commit f7d909d547
1 changed files with 1 additions and 20 deletions
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21
include/asm-x86/sync_bitops.h
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@ -123,26 +123,7 @@ static inline int sync_test_and_change_bit(int nr, volatile unsigned long* addr)
return oldbit;
}
static __always_inline int sync_constant_test_bit(int nr, const volatile unsigned long *addr)
{
return ((1UL << (nr & 31)) &
(((const volatile unsigned int *)addr)[nr >> 5])) != 0;
}
static inline int sync_var_test_bit(int nr, const volatile unsigned long * addr)
{
int oldbit;
__asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0"
:"=r" (oldbit)
:"m" (ADDR),"Ir" (nr));
return oldbit;
}
#define sync_test_bit(nr,addr) \
(__builtin_constant_p(nr) ? \
sync_constant_test_bit((nr),(addr)) : \
sync_var_test_bit((nr),(addr)))
#define sync_test_bit test_bit
#undef ADDR