• Theodore Ts'o's avatar
    ext4: Remove bogus BUG() check in ext4_bmap() · b9ec63f7
    Theodore Ts'o authored
    The code to support journal-less ext4 operation added a BUG to
    ext4_bmap() which fired if there was no journal and the
    EXT4_STATE_JDATA bit was set in the i_state field.  This caused
    running the filefrag program (which uses the FIMBAP ioctl) to trigger
    a BUG().
    
    The EXT4_STATE_JDATA bit is only used for ext4_bmap(), and it's
    harmless for the bit to be set.  We could add a check in
    __ext4_journalled_writepage() and ext4_journalled_write_end() to only
    set the EXT4_STATE_JDATA bit if the journal is present, but that adds
    an extra test and jump instruction.  It's easier to simply remove the
    BUG check.
    
    http://bugzilla.kernel.org/show_bug.cgi?id=12568Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    Cc: stable@kernel.org
    b9ec63f7
inode.c 148 KB