On 27.11.18 г. 18:00 ч., Johannes Thumshirn wrote:
> In map_private_extent_buffer() use offset_in_page() to initialize
> 'start_offset' instead of open-coding it.
>
> Signed-off-by: Johannes Thumshirn <jthumsh...@suse.de>
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
> ---
> fs/btrfs/extent_io.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index 7aafdec49dc3..85cd3975c680 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -5383,7 +5383,7 @@ int map_private_extent_buffer(const struct
> extent_buffer *eb,
> size_t offset;
> char *kaddr;
> struct page *p;
> - size_t start_offset = eb->start & ((u64)PAGE_SIZE - 1);
> + size_t start_offset = offset_in_page(eb->start);
> unsigned long i = (start_offset + start) >> PAGE_SHIFT;
> unsigned long end_i = (start_offset + start + min_len - 1) >>
> PAGE_SHIFT;
>
