[PATCH] ppc64: use smp_mb and smp_wmb
Use smp_mb and smp_wmb. In particular smp_wmb is lighter weight than wmb.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/ppc64/kernel/time.c b/arch/ppc64/kernel/time.c
index 77ded5a..772a465 100644
--- a/arch/ppc64/kernel/time.c
+++ b/arch/ppc64/kernel/time.c
@@ -221,15 +221,15 @@
temp_varp->tb_to_xs = do_gtod.varp->tb_to_xs;
temp_varp->tb_orig_stamp = new_tb_orig_stamp;
temp_varp->stamp_xsec = new_stamp_xsec;
- mb();
+ smp_mb();
do_gtod.varp = temp_varp;
do_gtod.var_idx = temp_idx;
++(systemcfg->tb_update_count);
- wmb();
+ smp_wmb();
systemcfg->tb_orig_stamp = new_tb_orig_stamp;
systemcfg->stamp_xsec = new_stamp_xsec;
- wmb();
+ smp_wmb();
++(systemcfg->tb_update_count);
}
@@ -648,7 +648,7 @@
temp_varp->tb_to_xs = new_tb_to_xs;
temp_varp->stamp_xsec = new_stamp_xsec;
temp_varp->tb_orig_stamp = do_gtod.varp->tb_orig_stamp;
- mb();
+ smp_mb();
do_gtod.varp = temp_varp;
do_gtod.var_idx = temp_idx;
@@ -662,10 +662,10 @@
* loops back and reads them again until this criteria is met.
*/
++(systemcfg->tb_update_count);
- wmb();
+ smp_wmb();
systemcfg->tb_to_xs = new_tb_to_xs;
systemcfg->stamp_xsec = new_stamp_xsec;
- wmb();
+ smp_wmb();
++(systemcfg->tb_update_count);
write_sequnlock_irqrestore( &xtime_lock, flags );