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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: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-01-02 12:45:27 -05:00
parent 4e728cf8ff
commit 756d097b95
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-bufio.c
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@ -630,7 +630,7 @@ static void use_inline_bio(struct dm_buffer *b, int rw, sector_t block,
do { do {
if (!bio_add_page(&b->bio, virt_to_page(ptr), if (!bio_add_page(&b->bio, virt_to_page(ptr),
len < PAGE_SIZE ? len : PAGE_SIZE, 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); BUG_ON(b->c->block_size <= PAGE_SIZE);
use_dmio(b, rw, block, end_io); use_dmio(b, rw, block, end_io);
return; return;