reiserfs: locking, push write lock out of xattr code

The reiserfs xattr code doesn't need the write lock and sleeps all over
the place. We can simplify the locking by releasing it and reacquiring
after the xattr call.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>

diff --cc fs/reiserfs/inode.c
Simple merge

diff --cc fs/reiserfs/super.c
Simple merge

diff --cc fs/reiserfs/xattr.c
Simple merge

diff --cc fs/reiserfs/xattr_acl.c
Simple merge