From: Christoph Lameter <cl@linux.com>
Date: Mon, 6 Dec 2010 17:40:07 +0000 (-0600)
Subject: xen: Use this_cpu_inc_return
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b2e4ae69757cdfef4c612a04f097c1e20489a565;p=linux-beck.git

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>
---

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index a10c66dc9dda..65f8637d13cf 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1109,7 +1109,7 @@ static void __xen_evtchn_do_upcall(void)
 
 		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. */