linux-kernel - [PATCH] mm: filemap: remove include of hardirq.h

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Message-Id: <1509734868-120762-1-git-send-email-yang.s@alibaba-inc.com>
Date:   Sat, 04 Nov 2017 02:47:48 +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: filemap: remove include of hardirq.h

in_atomic() has been moved to include/linux/preempt.h, and the filemap.c
doesn't use in_atomic() directly at all, so it sounds unnecessary to
include hardirq.h.
With removing hardirq.h, around 32 bytes can be saved for x86_64 bzImage
with allnoconfig.

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

diff --git a/mm/filemap.c b/mm/filemap.c
index 594d73f..57238f4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -31,7 +31,6 @@
 #include <linux/blkdev.h>
 #include <linux/security.h>
 #include <linux/cpuset.h>
-#include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */
 #include <linux/hugetlb.h>
 #include <linux/memcontrol.h>
 #include <linux/cleancache.h>
-- 
1.8.3.1