linux-kernel - [PATCH 1/2] init: make the path argument a const in name_to_dev

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Date:	Tue, 25 May 2010 10:46:50 -0500
From:	Will Drewry <wad@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Al Viro <viro@...iv.linux.org.uk>, Nick Piggin <npiggin@...e.de>,
	Tejun Heo <tj@...nel.org>,
	Scott James Remnant <scott@...ntu.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Harald Hoyer <harald@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>, agk@...hat.com,
	snitzer@...hat.com, Will Drewry <wad@...omium.org>
Subject: [PATCH 1/2] init: make the path argument a const in name_to_dev_t

name_to_dev_t takes a char * argument which it never modifies.  This
change converts it to a const char *.

(This is useful with the second patch in the series which exports the
symbol.  External consumers of the function will now be able to pass in
a const char * without duping or casting away const-ness.)

Signed-off-by: Will Drewry <wad@...omium.org>
---
 include/linux/mount.h |    2 +-
 init/do_mounts.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 4bd0547..ad819a0 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -134,6 +134,6 @@ extern int do_add_mount(struct vfsmount *newmnt, struct path *path,
 
 extern void mark_mounts_for_expiry(struct list_head *mounts);
 
-extern dev_t name_to_dev_t(char *name);
+extern dev_t name_to_dev_t(const char *name);
 
 #endif /* _LINUX_MOUNT_H */
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 0848a5b..a322b13 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -75,7 +75,7 @@ __setup("rw", readwrite);
  *	bangs.
  */
 
-dev_t name_to_dev_t(char *name)
+dev_t name_to_dev_t(const char *name)
 {
 	char s[32];
 	char *p;
-- 
1.7.0.4

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