My real first kernel patch. I am quite exciting about it. Finally I got a Signed-off-by in the kernel commit log :)
Luckily enough, the patch got merged just before 2.6.30-rc3 was released.
Author: Peng Tao
Date: Mon Jul 13 09:30:17 2009 -0400
ext4: fix null handler of ioctls in no journal mode
The EXT4_IOC_GROUP_ADD and EXT4_IOC_GROUP_EXTEND ioctls should not
flush the journal in no_journal mode. Otherwise, running resize2fs on
a mounted no_journal partition triggers the following error messages:
BUG: unable to handle kernel NULL pointer dereference at 00000014
IP:  _spin_lock+0x8/0x19
*pde = 00000000
Oops: 0002 [#1] SMP
Signed-off-by: Peng Tao
Signed-off-by: "Theodore Ts'o"