linux-kernel - [tip:perf/urgent] tools lib lk: Uninclude linux/ magic.h in debugfs.c

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Date:	Fri, 20 Sep 2013 02:57:01 -0700
From:	tip-bot for Vinson Lee <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, tglx@...utronix.de, bp@...e.de, vlee@...tter.com,
	vlee@...edesktop.org
Subject: [tip:perf/urgent] tools lib lk: Uninclude linux/
 magic.h in debugfs.c

Commit-ID:  ce7eebe5c3deef8e19c177c24ee75843256e69ca
Gitweb:     http://git.kernel.org/tip/ce7eebe5c3deef8e19c177c24ee75843256e69ca
Author:     Vinson Lee <vlee@...tter.com>
AuthorDate: Wed, 18 Sep 2013 16:16:40 -0700
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 19 Sep 2013 15:08:53 -0300

tools lib lk: Uninclude linux/magic.h in debugfs.c

The compilation only looks for linux/magic.h from the default include
paths, which does not include the source tree. This results in a build
error if linux/magic.h is not available or not installed.

For example, this build error occurs on CentOS 5.

$ make -C tools/lib/lk V=1
[...]
gcc -o debugfs.o -c -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6
-D_FORTIFY_SOURCE=2 -Wbad-function-cast -Wdeclaration-after-statement
-Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wno-system-headers
-Wold-style-definition -Wpacked -Wredundant-decls -Wshadow
-Wstrict-aliasing=3 -Wstrict-prototypes -Wswitch-default -Wswitch-enum
-Wundef -Wwrite-strings -Wformat  -fPIC  -D_LARGEFILE64_SOURCE
-D_FILE_OFFSET_BITS=64 debugfs.c
debugfs.c:8:25: error: linux/magic.h: No such file or directory

The only symbol from linux/magic.h needed by debugfs.c is DEBUGFS_MAGIC,
and that is already defined in debugfs.h. linux/magic.h isn't providing
any extra symbols and can unincluded. This is similar to the approach by
perf, which has its own magic.h wrapper at
tools/perf/util/include/linux/magic.h

Signed-off-by: Vinson Lee <vlee@...tter.com>
Acked-by: Borislav Petkov <bp@...e.de>
Cc: Borislav Petkov <bp@...e.de>
Cc: Vinson Lee <vlee@...edesktop.org>
Cc: stable@...r.kernel.org
Link: http://lkml.kernel.org/r/1379546200-17028-1-git-send-email-vlee@freedesktop.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/lk/debugfs.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/lib/lk/debugfs.c b/tools/lib/lk/debugfs.c
index 099e7cd..7c43479 100644
--- a/tools/lib/lk/debugfs.c
+++ b/tools/lib/lk/debugfs.c
@@ -5,7 +5,6 @@
 #include <stdbool.h>
 #include <sys/vfs.h>
 #include <sys/mount.h>
-#include <linux/magic.h>
 #include <linux/kernel.h>
 
 #include "debugfs.h"
--
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