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btrfs: use u64 for the page indices in heuristic_collect_sample()

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index and index_end are derived from the u64 start and end offsets, and
index is shifted back into a byte offset for offset_in_folio(), which
needs a cast to u64 to be safe on 32-bit. Make them u64 instead so the
cast goes away. They still fit pgoff_t where they are passed to
filemap_get_folio(), as they came from a valid file offset.

Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Tal Zussman 2026-09-09 13:10:48 -04:00 committed by David Sterba
parent cf7ded644e
commit d8fb1db2db
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/compression.c
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@ -1489,7 +1489,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end,
struct heuristic_ws *ws)
{
struct folio *folio;
pgoff_t index, index_end;
u64 index, index_end;
u32 i, curr_sample_pos;
u8 *in_data;
@ -1517,7 +1517,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end,
folio = filemap_get_folio(inode->i_mapping, index);
ASSERT(!IS_ERR(folio));
in_data = kmap_local_folio(folio,
offset_in_folio(folio, (u64)index << PAGE_SHIFT));
offset_in_folio(folio, index << PAGE_SHIFT));
/* Handle case where the start is not aligned to PAGE_SIZE */
i = start % PAGE_SIZE;
while (i < PAGE_SIZE - SAMPLING_READ_SIZE) {