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author | David S. Miller <davem@davemloft.net> | 2008-07-18 13:39:39 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2008-07-18 13:39:39 +0400 |
commit | 49997d75152b3d23c53b0fa730599f2f74c92c65 (patch) | |
tree | 46e93126170d02cfec9505172e545732c1b69656 /include/asm-x86/atomic_64.h | |
parent | a0c80b80e0fb48129e4e9d6a9ede914f9ff1850d (diff) | |
parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
download | linux-49997d75152b3d23c53b0fa730599f2f74c92c65.tar.xz |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
Documentation/powerpc/booting-without-of.txt
drivers/atm/Makefile
drivers/net/fs_enet/fs_enet-main.c
drivers/pci/pci-acpi.c
net/8021q/vlan.c
net/iucv/iucv.c
Diffstat (limited to 'include/asm-x86/atomic_64.h')
-rw-r--r-- | include/asm-x86/atomic_64.h | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/include/asm-x86/atomic_64.h b/include/asm-x86/atomic_64.h index 3e0cd7d38335..a0095191c02e 100644 --- a/include/asm-x86/atomic_64.h +++ b/include/asm-x86/atomic_64.h @@ -11,12 +11,6 @@ * resource counting etc.. */ -#ifdef CONFIG_SMP -#define LOCK "lock ; " -#else -#define LOCK "" -#endif - /* * Make sure gcc doesn't try to be clever and move things around * on us. We need to use _exactly_ the address the user gave us, @@ -431,6 +425,32 @@ static inline int atomic64_add_unless(atomic64_t *v, long a, long u) return c != (u); } +/** + * atomic_inc_short - increment of a short integer + * @v: pointer to type int + * + * Atomically adds 1 to @v + * Returns the new value of @u + */ +static inline short int atomic_inc_short(short int *v) +{ + asm(LOCK_PREFIX "addw $1, %0" : "+m" (*v)); + return *v; +} + +/** + * atomic_or_long - OR of two long integers + * @v1: pointer to type unsigned long + * @v2: pointer to type unsigned long + * + * Atomically ORs @v1 and @v2 + * Returns the result of the OR + */ +static inline void atomic_or_long(unsigned long *v1, unsigned long v2) +{ + asm(LOCK_PREFIX "orq %1, %0" : "+m" (*v1) : "r" (v2)); +} + #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) /* These are x86-specific, used by some header files */ |