diff options
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 3d7810341b57..fe817432190c 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -299,22 +299,6 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s __u.__val; \ }) -/** - * READ_ONCE_CTRL - Read a value heading a control dependency - * @x: The value to be read, heading the control dependency - * - * Control dependencies are tricky. See Documentation/memory-barriers.txt - * for important information on how to use them. Note that in many cases, - * use of smp_load_acquire() will be much simpler. Control dependencies - * should be avoided except on the hottest of hotpaths. - */ -#define READ_ONCE_CTRL(x) \ -({ \ - typeof(x) __val = READ_ONCE(x); \ - smp_read_barrier_depends(); /* Enforce control dependency. */ \ - __val; \ -}) - #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ |