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Commit f734c89c authored by Jan Kara's avatar Jan Kara Committed by Jens Axboe
Browse files

direct-io: Use clean_bdev_aliases() instead of handmade iteration 



Use new provided function instead of an iteration through all allocated
blocks.

Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 29f3ad7d

fs/direct-io.c

+7 −21
Original line number Diff line number Diff line
@@ -842,24 +842,6 @@ submit_page_section(struct dio *dio, struct dio_submit *sdio, struct page *page, 
	return ret;

}



/*

 * Clean any dirty buffers in the blockdev mapping which alias newly-created

 * file blocks.  Only called for S_ISREG files - blockdevs do not set

 * buffer_new

 */

static void clean_blockdev_aliases(struct dio *dio, struct buffer_head *map_bh)

{

	unsigned i;

	unsigned nblocks;



	nblocks = map_bh->b_size >> dio->inode->i_blkbits;



	for (i = 0; i < nblocks; i++) {

		unmap_underlying_metadata(map_bh->b_bdev,

					  map_bh->b_blocknr + i);

	}

}



/*

 * If we are not writing the entire block and get_block() allocated

 * the block for us, we need to fill-in the unused portion of the
@@ -960,11 +942,15 @@ static int do_direct_IO(struct dio *dio, struct dio_submit *sdio, 
					goto do_holes;



				sdio->blocks_available =

						map_bh->b_size >> sdio->blkbits;

						map_bh->b_size >> blkbits;

				sdio->next_block_for_io =

					map_bh->b_blocknr << sdio->blkfactor;

				if (buffer_new(map_bh))

					clean_blockdev_aliases(dio, map_bh);

				if (buffer_new(map_bh)) {

					clean_bdev_aliases(

						map_bh->b_bdev,

						map_bh->b_blocknr,

						map_bh->b_size >> blkbits);

				}



				if (!sdio->blkfactor)

					goto do_holes;