postgres.git / summary / log / commit / refs

commit    747ca66977d5539a5ab9e5f33d3ca074fc3fd19b
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Sat Aug 29 20:34:30 2015 +0000
First released in: 9.4.5

    Use "mb" not the nonexistent "rmb" for pg_read_barrier() on Alpha.
    
    It's only necessary to fix this in 9.4; later versions don't have this
    code (because we ripped out Alpha support entirely), while earlier ones
    aren't actually using pg_read_barrier() anywhere.
    
    Per rather belated report from Christoph Berg.


 src/include/storage/barrier.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/include/storage/barrier.h b/src/include/storage/barrier.h
index 2bef2eb6ad9..94169bd7460 100644
--- a/src/include/storage/barrier.h
+++ b/src/include/storage/barrier.h
@@ -117,7 +117,7 @@ extern slock_t dummy_spinlock;
  * read barrier to cover that case.  We might need to add that later.
  */
 #define pg_memory_barrier()		__asm__ __volatile__ ("mb" : : : "memory")
-#define pg_read_barrier()		__asm__ __volatile__ ("rmb" : : : "memory")
+#define pg_read_barrier()		__asm__ __volatile__ ("mb" : : : "memory")
 #define pg_write_barrier()		__asm__ __volatile__ ("wmb" : : : "memory")
 #elif defined(__hppa) || defined(__hppa__)		/* HP PA-RISC */
 


[parent: 3da9c060fc77]