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fsdax: simplify the offset check in dax_iomap_zero

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The file relative offset must have the same alignment as the storage
offset, so use that and get rid of the call to iomap_sector.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-17-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2021-11-29 11:21:50 +01:00 committed by Dan Williams
parent f1ba5fafba
commit 4a2d7d5950
1 changed files with 1 additions and 3 deletions
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4
fs/dax.c
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@ -1123,7 +1123,6 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap)
{
sector_t sector = iomap_sector(iomap, pos & PAGE_MASK);
pgoff_t pgoff = dax_iomap_pgoff(iomap, pos);
long rc, id;
void *kaddr;
@ -1131,8 +1130,7 @@ s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap)
unsigned offset = offset_in_page(pos);
unsigned size = min_t(u64, PAGE_SIZE - offset, length);
if (IS_ALIGNED(sector << SECTOR_SHIFT, PAGE_SIZE) &&
(size == PAGE_SIZE))
if (IS_ALIGNED(pos, PAGE_SIZE) && size == PAGE_SIZE)
page_aligned = true;
id = dax_read_lock();