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iomap: Simplify is_partially_uptodate a little

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Remove the unnecessary variable 'len' and fix a comment to refer to
the folio instead of the page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-03-04 14:05:23 -05:00
parent 1e4702806f
commit 2756c818e5
1 changed files with 4 additions and 5 deletions
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9
fs/iomap/buffered-io.c
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@ -435,18 +435,17 @@ bool iomap_is_partially_uptodate(struct folio *folio, size_t from, size_t count)
{
struct iomap_page *iop = to_iomap_page(folio);
struct inode *inode = folio->mapping->host;
size_t len;
unsigned first, last, i;
if (!iop)
return false;
/* Limit range to this folio */
len = min(folio_size(folio) - from, count);
/* Caller's range may extend past the end of this folio */
count = min(folio_size(folio) - from, count);
/* First and last blocks in range within page */
/* First and last blocks in range within folio */
first = from >> inode->i_blkbits;
last = (from + len - 1) >> inode->i_blkbits;
last = (from + count - 1) >> inode->i_blkbits;
for (i = first; i <= last; i++)
if (!test_bit(i, iop->uptodate))