fs: Constify path_is_under()'s arguments

The function path_is_under() doesn't modify the paths pointed by its arguments but only browse them. Constifying this pointers make a cleaner interface to be used by (future) code which may only have access to const struct path pointers (e.g. LSM hooks). Signed-off-by: Mickaël Salaün <[email protected]> Cc: Alexander Viro <[email protected]> Signed-off-by: Al Viro <[email protected]>
akeromi · Dec 5, 2016 · 640eb7e · 640eb7e
1 parent e5517c2
commit 640eb7e
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/fs/namespace.c b/fs/namespace.c
@@ -2997,7 +2997,7 @@ bool is_path_reachable(struct mount *mnt, struct dentry *dentry,
 	return &mnt->mnt == root->mnt && is_subdir(dentry, root->dentry);
 }
 
-bool path_is_under(struct path *path1, struct path *path2)
+bool path_is_under(const struct path *path1, const struct path *path2)
 {
 	bool res;
 	read_seqlock_excl(&mount_lock);

diff --git a/include/linux/fs.h b/include/linux/fs.h
@@ -2709,7 +2709,7 @@ extern struct file * open_exec(const char *);
 
 /* fs/dcache.c -- generic fs support functions */
 extern bool is_subdir(struct dentry *, struct dentry *);
-extern bool path_is_under(struct path *, struct path *);
+extern bool path_is_under(const struct path *, const struct path *);
 
 extern char *file_path(struct file *, char *, int);