commit b2e4ae69757cdfef4c612a04f097c1e20489a565
author Christoph Lameter <cl@linux.com> Mon Dec 06 11:40:07 2010 -0600
committer Tejun Heo <tj@kernel.org> Fri Dec 17 15:18:05 2010 +0100
tree 03a8d1c7d6263564474035a110af9ee61e5eddf8
parent cd85fc58cd71bf6b89612efafb9a84e655ed7d66

xen: Use this_cpu_inc_return

__this_cpu_inc_return reduces code and simplifies code.

Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>

drivers/xen/events.c

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index a10c66d..65f8637 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1109,7 +1109,7 @@
 
 		vcpu_info->evtchn_upcall_pending = 0;
 
-		if (__get_cpu_var(xed_nesting_count)++)
+		if (__this_cpu_inc_return(xed_nesting_count) - 1)
 			goto out;
 
 #ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */