The eb length is nodesize, as initialized in __alloc_extent_buffer.
Regardless of start, we should always get the same number of pages, so
use that fact.
Signed-off-by: David Sterba <dste...@suse.com>
---
fs/btrfs/extent_io.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index a53009694b16..ee92c1289edd 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -454,8 +454,7 @@ void wait_on_extent_buffer_writeback(struct extent_buffer
*eb);
static inline unsigned long num_extent_pages(u64 start, u64 len)
{
- return ((start + len + PAGE_SIZE - 1) >> PAGE_SHIFT) -
- (start >> PAGE_SHIFT);
+ return len >> PAGE_SHIFT;
}
static inline void extent_buffer_get(struct extent_buffer *eb)
--
2.16.2
--
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