mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 02:52:56 +00:00
a7c490333d
Fix build after API changes. Reported-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
21 lines
659 B
C
21 lines
659 B
C
#if defined(__i386__) || defined(__x86_64__)
|
|
#define barrier() asm volatile("" ::: "memory")
|
|
#define virt_mb() __sync_synchronize()
|
|
#define virt_rmb() barrier()
|
|
#define virt_wmb() barrier()
|
|
/* Atomic store should be enough, but gcc generates worse code in that case. */
|
|
#define virt_store_mb(var, value) do { \
|
|
typeof(var) virt_store_mb_value = (value); \
|
|
__atomic_exchange(&(var), &virt_store_mb_value, &virt_store_mb_value, \
|
|
__ATOMIC_SEQ_CST); \
|
|
barrier(); \
|
|
} while (0);
|
|
/* Weak barriers should be used. If not - it's a bug */
|
|
# define mb() abort()
|
|
# define rmb() abort()
|
|
# define wmb() abort()
|
|
#else
|
|
#error Please fill in barrier macros
|
|
#endif
|
|
|