diff options
Diffstat (limited to 'fs/btrfs/extent_io.h')
| -rw-r--r-- | fs/btrfs/extent_io.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 8a36117ed453..039a73731135 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -79,7 +79,7 @@ enum { * single word in a bitmap may straddle two pages in the extent buffer. */ #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) -#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) +#define BYTE_MASK ((1U << BITS_PER_BYTE) - 1) #define BITMAP_FIRST_BYTE_MASK(start) \ ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) #define BITMAP_LAST_BYTE_MASK(nbits) \ @@ -293,6 +293,8 @@ static inline int num_extent_pages(const struct extent_buffer *eb) */ static inline int num_extent_folios(const struct extent_buffer *eb) { + if (!eb->folios[0]) + return 0; if (folio_order(eb->folios[0])) return 1; return num_extent_pages(eb); |