vfs: cleanup show_mountinfo

Starting with commit v3.2-rc4-1-g02125a8, seq_path_root() no longer
changes the value of its "struct path *root" argument.
Starting with commit v3.2-rc7-104-g8c9379e, the "struct path *root"
argument of seq_path_root() is const.
As result, the temporary variable "root" in show_mountinfo() that
holds a copy of struct path root is no longer needed.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 73ca1740d839..789e8d1e21db 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -125,7 +125,6 @@ static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
         struct mount *r = real_mount(mnt);
         struct super_block *sb = mnt->mnt_sb;
         struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
-        struct path root = p->root;
         int err = 0;
 
         seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id,
@@ -139,7 +138,7 @@ static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
         seq_putc(m, ' ');
 
         /* mountpoints outside of chroot jail will give SEQ_SKIP on this */
-        err = seq_path_root(m, &mnt_path, &root, " \t\n\\");
+        err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\");
         if (err)
                 goto out;