fuse: fix large stack use

gcc 4.4 warns about:
  fs/fuse/dev.c: In function ‘fuse_notify_inval_entry’:
  fs/fuse/dev.c:925: warning: the frame size of 1060 bytes is larger than 1024 bytes

The problem is we declare two structures and a large array on the stack,
I move the array alway from the stack and allocate memory for it dynamically.

Signed-off-by: Fang Wenqi <antonf@turbolinux.com.cn>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index ab62230..eb7e942 100644 (file)
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -881,10 +881,15 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
                                   struct fuse_copy_state *cs)
 {
        struct fuse_notify_inval_entry_out outarg;
-       int err = -EINVAL;
-       char buf[FUSE_NAME_MAX+1];
+       int err = -ENOMEM;
+       char *buf;
        struct qstr name;
 
+       buf = kzalloc(FUSE_NAME_MAX + 1, GFP_KERNEL);
+       if (!buf)
+               goto err;
+
+       err = -EINVAL;
        if (size < sizeof(outarg))
                goto err;
 
@@ -910,9 +915,11 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
        if (fc->sb)
                err = fuse_reverse_inval_entry(fc->sb, outarg.parent, &name);
        up_read(&fc->killsb);
+       kfree(buf);
        return err;
 
 err:
+       kfree(buf);
        fuse_copy_finish(cs);
        return err;
 }