lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sparc64: Stop using memory barriers for atomics and locks.

Browse Source 
The kernel always executes in the TSO memory model now,
so none of this stuff is necessary any more.

With helpful feedback from Nick Piggin.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2008-11-15 13:33:25 -08:00
parent 64f2dde3f7
commit 293666b7a1
15 changed files with 17 additions and 137 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/sparc/include/asm/bitops_64.h
View File

@ -23,13 +23,8 @@ extern void change_bit(unsigned long nr, volatile unsigned long *addr);
#include <asm-generic/bitops/non-atomic.h>
#ifdef CONFIG_SMP
#define smp_mb__before_clear_bit() membar_storeload_loadload()
#define smp_mb__after_clear_bit() membar_storeload_storestore()
#else
#define smp_mb__before_clear_bit() barrier()
#define smp_mb__after_clear_bit() barrier()
#endif
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/__ffs.h>