From 87371e4fa4901d84ce83356b909b83f31f40758f Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Thu, 18 Oct 2007 03:06:52 -0700 Subject: [PATCH] ia64: lock bitops Convert ia64 to new bitops. Signed-off-by: Nick Piggin Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-ia64/bitops.h | 43 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 2 deletions(-) diff --git a/include/asm-ia64/bitops.h b/include/asm-ia64/bitops.h index 569dd62fe192..2144f1a8ed6f 100644 --- a/include/asm-ia64/bitops.h +++ b/include/asm-ia64/bitops.h @@ -93,6 +93,38 @@ clear_bit (int nr, volatile void *addr) } while (cmpxchg_acq(m, old, new) != old); } +/** + * clear_bit_unlock - Clears a bit in memory with release + * @nr: Bit to clear + * @addr: Address to start counting from + * + * clear_bit_unlock() is atomic and may not be reordered. It does + * contain a memory barrier suitable for unlock type operations. + */ +static __inline__ void +clear_bit_unlock (int nr, volatile void *addr) +{ + __u32 mask, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + mask = ~(1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old & mask; + } while (cmpxchg_rel(m, old, new) != old); +} + +/** + * __clear_bit_unlock - Non-atomically clear a bit with release + * + * This is like clear_bit_unlock, but the implementation may use a non-atomic + * store (this one uses an atomic, however). + */ +#define __clear_bit_unlock clear_bit_unlock + /** * __clear_bit - Clears a bit in memory (non-atomic version) */ @@ -169,6 +201,15 @@ test_and_set_bit (int nr, volatile void *addr) return (old & bit) != 0; } +/** + * test_and_set_bit_lock - Set a bit and return its old value for lock + * @nr: Bit to set + * @addr: Address to count from + * + * This is the same as test_and_set_bit on ia64 + */ +#define test_and_set_bit_lock test_and_set_bit + /** * __test_and_set_bit - Set a bit and return its old value * @nr: Bit to set @@ -371,8 +412,6 @@ hweight64 (unsigned long x) #define hweight16(x) (unsigned int) hweight64((x) & 0xfffful) #define hweight8(x) (unsigned int) hweight64((x) & 0xfful) -#include - #endif /* __KERNEL__ */ #include -- 2.20.1