linux-kernel - [PATCH 09/14] kdb: use atomic_dec_not

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Date:   Mon, 30 Jan 2017 19:48:03 +0100
From:   Fabian Frederick <fabf@...net.be>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Jason Wessel <jason.wessel@...driver.com>,
        kgdb-bugreport@...ts.sourceforge.net,
        Fabian Frederick <fabf@...net.be>
Subject: [PATCH 09/14] kdb: use atomic_dec_not_zero()

instead of atomic_add_unless(value, -1, 0)

Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 kernel/debug/kdb/kdb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index ca18391..095e6d8 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2173,7 +2173,7 @@ static int kdb_disable_nmi(int argc, const char *argv[])
 
 static int kdb_param_enable_nmi(const char *val, const struct kernel_param *kp)
 {
-	if (!atomic_add_unless(&kdb_nmi_disabled, -1, 0))
+	if (!atomic_dec_not_zero(&kdb_nmi_disabled))
 		return -EINVAL;
 	arch_kgdb_ops.enable_nmi(1);
 	return 0;
-- 
2.9.3