[patch 05/14] hpfs: dont call permission()

hpfs_unlink() calls permission() prior to truncating the file.  HPFS
doesn't define a .permission method, so replace with explicit call to
generic_permission().

This is equivalent, except that devcgroup_inode_permission() and
security_inode_permission() are not called.

The truncation is just an implementation detail of the unlink, so
these security checks are unnecessary.

I suspect that even calling generic_permission() is unnecessary, since
we shouldn't mind if the file isn't writable.  But I leave that to the
maintainer to decide.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>

diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index d256559..d9c59a7 100644 (file)
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -415,7 +415,7 @@ again:
                d_drop(dentry);
                spin_lock(&dentry->d_lock);
                if (atomic_read(&dentry->d_count) > 1 ||
-                   permission(inode, MAY_WRITE, NULL) ||
+                   generic_permission(inode, MAY_WRITE, NULL) ||
                    !S_ISREG(inode->i_mode) ||
                    get_write_access(inode)) {
                        spin_unlock(&dentry->d_lock);