linux-kernel - [PATCH] smp: blackfin: fix check error, using atomic_ops to handle atomic

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Date:	Tue, 16 Jul 2013 13:25:21 +0800
From:	Steven Miao <realmz6@...nel.org>
To:	<torvalds@...ux-foundation.org>, <geert@...ux-m68k.org>
CC:	<uclinux-dist-devel@...ckfin.uclinux.org>,
	<linux-kernel@...r.kernel.org>, Steven Miao <realmz6@...il.com>
Subject: [PATCH] smp: blackfin: fix check error, using atomic_ops to handle atomic_t type

From: Steven Miao <realmz6@...il.com>

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Steven Miao <realmz6@...il.com>
---
 arch/blackfin/mach-common/smp.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 961d839..b5f9ed7 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -147,7 +147,7 @@ static irqreturn_t ipi_handler_int1(int irq, void *dev_instance)
 	platform_clear_ipi(cpu, IRQ_SUPPLE_1);
 
 	bfin_ipi_data = &__get_cpu_var(bfin_ipi);
-	while ((pending = xchg(&bfin_ipi_data->bits, 0)) != 0) {
+	while ((pending = atomic_xchg(&bfin_ipi_data->bits, 0)) != 0) {
 		msg = 0;
 		do {
 			msg = find_next_bit(&pending, BITS_PER_LONG, msg + 1);
@@ -182,8 +182,8 @@ static void bfin_ipi_init(void)
 	struct ipi_data *bfin_ipi_data;
 	for_each_possible_cpu(cpu) {
 		bfin_ipi_data = &per_cpu(bfin_ipi, cpu);
-		bfin_ipi_data->bits = 0;
-		bfin_ipi_data->count = 0;
+		atomic_set(&bfin_ipi_data->bits, 0);
+		atomic_set(&bfin_ipi_data->count, 0);
 	}
 }
 
-- 
1.7.9.5


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