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Commit 756d097b authored by Al Viro's avatar Al Viro
Browse files

dm-bufio: virt_to_phys() doesn't change remainder modulo PAGE_SIZE 



... so virt_to_phys(p) & (PAGE_SIZE - 1) is a very odd way to
spell offset_in_page(p).

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 4e728cf8

drivers/md/dm-bufio.c

+1 −1
Original line number Diff line number Diff line
@@ -630,7 +630,7 @@ static void use_inline_bio(struct dm_buffer *b, int rw, sector_t block, 
	do {

		if (!bio_add_page(&b->bio, virt_to_page(ptr),

				  len < PAGE_SIZE ? len : PAGE_SIZE,

				  virt_to_phys(ptr) & (PAGE_SIZE - 1))) {

				  offset_in_page(ptr))) {

			BUG_ON(b->c->block_size <= PAGE_SIZE);

			use_dmio(b, rw, block, end_io);

			return;