linux-kernel - [PATCH] mm: use in_atomic() in print_vma

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Message-Id: <1509572313-102989-1-git-send-email-yang.s@alibaba-inc.com>
Date:   Thu, 02 Nov 2017 05:38:33 +0800
From:   "Yang Shi" <yang.s@...baba-inc.com>
To:     mhocko@...nel.org, akpm@...ux-foundation.org
Cc:     "Yang Shi" <yang.s@...baba-inc.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: use in_atomic() in print_vma_addr()

commit 3e51f3c4004c9b01f66da03214a3e206f5ed627b
("sched/preempt: Remove PREEMPT_ACTIVE unmasking off in_atomic()") makes
in_atomic() just check the preempt count, so it is not necessary to use
preempt_count() in print_vma_addr() any more. Replace preempt_count() to
in_atomic() which is a generic API for checking atomic context.

Signed-off-by: Yang Shi <yang.s@...baba-inc.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index a728bed..19b684e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4460,7 +4460,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
 	 * Do not print if we are in atomic
 	 * contexts (in exception stacks, etc.):
 	 */
-	if (preempt_count())
+	if (in_atomic())
 		return;
 
 	down_read(&mm->mmap_sem);
-- 
1.8.3.1