[IA64] Scaling fix for simultaneous unaligned accesses

Eliminate a hot shared cacheline that occurs if multiple cpus are
taking unaligned exceptions.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c
index 43b45b65ee5a9da2c446d712b67ba152f1e4fce0..f9e0ae936d1a9e278ea56bb9af1d35ae8159df26 100644 (file)
--- a/arch/ia64/kernel/unaligned.c
+++ b/arch/ia64/kernel/unaligned.c
@@ -1283,8 +1283,9 @@ within_logging_rate_limit (void)
 
        if (jiffies - last_time > 5*HZ)
                count = 0;
-       if (++count < 5) {
+       if (count < 5) {
                last_time = jiffies;
+               count++;
                return 1;
        }
        return 0;