[PATCH] reduce the stack footprint of exportfs_decode_fh()

no need to have _two_ 256-byte arrays on stack...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 5 deletions

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 7b0f75dcf80..51bdc5cab06 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -94,9 +94,8 @@ find_disconnected_root(struct dentry *dentry)
  * It may already be, as the flag isn't always updated when connection happens.
  */
 static int
-reconnect_path(struct vfsmount *mnt, struct dentry *target_dir)
+reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf)
 {
-        char nbuf[NAME_MAX+1];
         int noprogress = 0;
         int err = -ESTALE;
 
@@ -360,6 +359,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
 {
         const struct export_operations *nop = mnt->mnt_sb->s_export_op;
         struct dentry *result, *alias;
+        char nbuf[NAME_MAX+1];
         int err;
 
         /*
@@ -379,7 +379,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
                  * filesystem root.
                  */
                 if (result->d_flags & DCACHE_DISCONNECTED) {
-                        err = reconnect_path(mnt, result);
+                        err = reconnect_path(mnt, result, nbuf);
                         if (err)
                                 goto err_result;
                 }
@@ -395,7 +395,6 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
                  * It's not a directory.  Life is a little more complicated.
                  */
                 struct dentry *target_dir, *nresult;
-                char nbuf[NAME_MAX+1];
 
                 /*
                  * See if either the dentry we just got from the filesystem
@@ -429,7 +428,7 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
                  * connected to the filesystem root.  The VFS really doesn't
                  * like disconnected directories..
                  */
-                err = reconnect_path(mnt, target_dir);
+                err = reconnect_path(mnt, target_dir, nbuf);
                 if (err) {
                         dput(target_dir);
                         goto err_result;