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fs/buffer: simplify block_read_full_folio() with bh_offset()

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When we read over all buffers in a folio we currently use the
buffer index on the folio and blocksize to get the offset. Simplify
this with bh_offset(). This simplifies the loop while making no
functional changes.

Suggested-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20250221223823.1680616-2-mcgrof@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Luis Chamberlain
2025-02-21 14:38:16 -08:00
committed by Christian Brauner
parent 2014c95afe
commit 753aadebf2
1 changed files with 2 additions and 3 deletions
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5
fs/buffer.c
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@@ -2381,7 +2381,6 @@ int block_read_full_folio(struct folio *folio, get_block_t *get_block)
lblock = div_u64(limit + blocksize - 1, blocksize);
bh = head;
nr = 0;
i = 0;
do {
if (buffer_uptodate(bh))
@@ -2398,7 +2397,7 @@ int block_read_full_folio(struct folio *folio, get_block_t *get_block)
page_error = true;
}
if (!buffer_mapped(bh)) {
folio_zero_range(folio, i * blocksize,
folio_zero_range(folio, bh_offset(bh),
blocksize);
if (!err)
set_buffer_uptodate(bh);
@@ -2412,7 +2411,7 @@ int block_read_full_folio(struct folio *folio, get_block_t *get_block)
continue;
}
arr[nr++] = bh;
} while (i++, iblock++, (bh = bh->b_this_page) != head);
} while (iblock++, (bh = bh->b_this_page) != head);
if (fully_mapped)
folio_set_mappedtodisk(folio);