diff options
Diffstat (limited to 'fs/mpage.c')
| -rw-r--r-- | fs/mpage.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/fs/mpage.c b/fs/mpage.c index 630f4a7c7d03..84b02098e7a5 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -466,7 +466,7 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc, const unsigned blocks_per_page = PAGE_SIZE >> blkbits; sector_t last_block; sector_t block_in_file; - sector_t blocks[MAX_BUF_PER_PAGE]; + sector_t first_block; unsigned page_block; unsigned first_unmapped = blocks_per_page; struct block_device *bdev = NULL; @@ -504,10 +504,12 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc, if (!buffer_dirty(bh) || !buffer_uptodate(bh)) goto confused; if (page_block) { - if (bh->b_blocknr != blocks[page_block-1] + 1) + if (bh->b_blocknr != first_block + page_block) goto confused; + } else { + first_block = bh->b_blocknr; } - blocks[page_block++] = bh->b_blocknr; + page_block++; boundary = buffer_boundary(bh); if (boundary) { boundary_block = bh->b_blocknr; @@ -556,10 +558,12 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc, boundary_bdev = map_bh.b_bdev; } if (page_block) { - if (map_bh.b_blocknr != blocks[page_block-1] + 1) + if (map_bh.b_blocknr != first_block + page_block) goto confused; + } else { + first_block = map_bh.b_blocknr; } - blocks[page_block++] = map_bh.b_blocknr; + page_block++; boundary = buffer_boundary(&map_bh); bdev = map_bh.b_bdev; if (block_in_file == last_block) @@ -591,7 +595,7 @@ page_is_mapped: /* * This page will go to BIO. Do we need to send this BIO off first? */ - if (bio && mpd->last_block_in_bio != blocks[0] - 1) + if (bio && mpd->last_block_in_bio != first_block - 1) bio = mpage_bio_submit_write(bio); alloc_new: @@ -599,7 +603,7 @@ alloc_new: bio = bio_alloc(bdev, BIO_MAX_VECS, REQ_OP_WRITE | wbc_to_write_flags(wbc), GFP_NOFS); - bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9); + bio->bi_iter.bi_sector = first_block << (blkbits - 9); wbc_init_bio(wbc, bio); } @@ -627,7 +631,7 @@ alloc_new: boundary_block, 1 << blkbits); } } else { - mpd->last_block_in_bio = blocks[blocks_per_page - 1]; + mpd->last_block_in_bio = first_block + blocks_per_page - 1; } goto out; |