From: Zhao Lei <[email protected]> It can decrease a additional address calculation and increase little speed.
Signed-off-by: Zhao Lei <[email protected]> Signed-off-by: Miao Xie <[email protected]> --- fs/btrfs/struct-funcs.c | 10 +++++----- 1 files changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index c0f7eca..b0f80c0 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -49,13 +49,13 @@ u##bits btrfs_##name(struct extent_buffer *eb, \ { \ unsigned long part_offset = (unsigned long)s; \ unsigned long offset = part_offset + offsetof(type, member); \ - type *p; \ + u##bits *p; \ /* ugly, but we want the fast path here */ \ if (eb->map_token && offset >= eb->map_start && \ offset + sizeof(((type *)0)->member) <= eb->map_start + \ eb->map_len) { \ - p = (type *)(eb->kaddr + part_offset - eb->map_start); \ - return le##bits##_to_cpu(p->member); \ + p = (u##bits *)(eb->kaddr + offset - eb->map_start); \ + return le##bits##_to_cpu(*p); \ } \ { \ int err; \ @@ -74,8 +74,8 @@ u##bits btrfs_##name(struct extent_buffer *eb, \ read_eb_member(eb, s, type, member, &leres); \ return le##bits##_to_cpu(leres); \ } \ - p = (type *)(kaddr + part_offset - map_start); \ - res = le##bits##_to_cpu(p->member); \ + p = (u##bits *)(kaddr + offset - map_start); \ + res = le##bits##_to_cpu(*p); \ if (unmap_on_exit) \ unmap_extent_buffer(eb, map_token, KM_USER1); \ return res; \ -- 1.6.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
