[PATCH 5/7] vfs - constify path parameter of path_has_submounts()

[Ian Kent]

From: Ian Kent <ikent@xxxxxxxxxx>

path_has_submounts() doesn't modify the passed in path parameter,
and shouldn't need to, make that usage explicit.

Signed-off-by: Ian Kent <raven@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Omar Sandoval <osandov@xxxxxxxxxxx>
---
 fs/dcache.c            |    2 +-
 include/linux/dcache.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 719d8b4..29bc910 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1298,7 +1298,7 @@ static enum d_walk_ret path_check_mount(void *data, struct dentry *dentry)
  * Return true if the parent or its subdirectories contain
  * a mount point in the current namespace.
  */
-int path_has_submounts(struct path *parent)
+int path_has_submounts(const struct path *parent)
 {
 	struct check_mount data = { .mnt = parent->mnt, .mounted = 0 };
 
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index f835bd4..c965e44 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -254,7 +254,7 @@ extern struct dentry *d_find_alias(struct inode *);
 extern void d_prune_aliases(struct inode *);
 
 /* test whether we have any submounts in a subdir tree */
-extern int path_has_submounts(struct path *);
+extern int path_has_submounts(const struct path *);
 
 /*
  * This adds the entry to the hash queues.