ext4: clean up the flags passed to __blockdev_direct_IO
authorJeff Moyer <jmoyer@redhat.com>
Mon, 5 Mar 2012 15:19:52 +0000 (10:19 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 5 Mar 2012 15:19:52 +0000 (10:19 -0500)
commit93ef8541d5c3ad1a73057ff358a49d0ee7146d6f
tree70c2a7cac370084edac29ee0156f52d488ee32ab
parentf70486055ee351158bd6999f3965ad378b52c694
ext4: clean up the flags passed to __blockdev_direct_IO

For extent-based files, you can perform DIO to holes, as mentioned in
the comments in ext4_ext_direct_IO.  However, that function passes
DIO_SKIP_HOLES to __blockdev_direct_IO, which is *really* confusing to
the uninitiated reader.  The key, here, is that the get_block function
passed in, ext4_get_block_write, completely ignores the create flag
that is passed to it (the create flag is passed in from the direct I/O
code, which uses the DIO_SKIP_HOLES flag to determine whether or not
it should be cleared).

This is a long-winded way of saying that the DIO_SKIP_HOLES flag is
ultimately ignored.  So let's remove it.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
fs/ext4/inode.c