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block: remove bogus comments in __bio_add_pc_page

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We are never called with file system pages by defintions for the
passthrough interface, and we also never undo any addition later
these days.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2019-04-25 09:04:34 +02:00 committed by Jens Axboe
parent 4713839dfe
commit 6601e44efd
1 changed files with 0 additions and 9 deletions
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9
block/bio.c
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@ -724,11 +724,6 @@ static int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
if (((bio->bi_iter.bi_size + len) >> 9) > queue_max_hw_sectors(q)) if (((bio->bi_iter.bi_size + len) >> 9) > queue_max_hw_sectors(q))
return 0; return 0;
/*
* For filesystems with a blocksize smaller than the pagesize
* we will often be called with the same page as last time and
* a consecutive offset. Optimize this special case.
*/
if (bio->bi_vcnt > 0) { if (bio->bi_vcnt > 0) {
bvec = &bio->bi_io_vec[bio->bi_vcnt - 1]; bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
@ -760,10 +755,6 @@ static int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
if (bio->bi_phys_segments >= queue_max_segments(q)) if (bio->bi_phys_segments >= queue_max_segments(q))
return 0; return 0;
/*
* setup the new entry, we might clear it again later if we
* cannot add the page
*/
bvec = &bio->bi_io_vec[bio->bi_vcnt]; bvec = &bio->bi_io_vec[bio->bi_vcnt];
bvec->bv_page = page; bvec->bv_page = page;
bvec->bv_len = len; bvec->bv_len = len;