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
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -881,10 +881,15 @@
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 @@
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;
}