diff options
| -rw-r--r-- | fs/btrfs/struct-funcs.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index 7987d3910660..225ef6d7e949 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -115,7 +115,8 @@ void btrfs_set_token_##bits(struct btrfs_map_token *token, \ const unsigned long idx = member_offset >> PAGE_SHIFT; \ const unsigned long oip = offset_in_page(member_offset); \ const int size = sizeof(u##bits); \ - __le##bits leres; \ + u8 lebytes[sizeof(u##bits)]; \ + const int part = PAGE_SIZE - oip; \ \ ASSERT(token); \ ASSERT(token->kaddr); \ @@ -125,16 +126,17 @@ void btrfs_set_token_##bits(struct btrfs_map_token *token, \ put_unaligned_le##bits(val, token->kaddr + oip); \ return; \ } \ + token->kaddr = page_address(token->eb->pages[idx]); \ + token->offset = idx << PAGE_SHIFT; \ if (oip + size <= PAGE_SIZE) { \ - token->kaddr = page_address(token->eb->pages[idx]); \ - token->offset = idx << PAGE_SHIFT; \ put_unaligned_le##bits(val, token->kaddr + oip); \ return; \ } \ + put_unaligned_le##bits(val, lebytes); \ + memcpy(token->kaddr + oip, lebytes, part); \ token->kaddr = page_address(token->eb->pages[idx + 1]); \ token->offset = (idx + 1) << PAGE_SHIFT; \ - leres = cpu_to_le##bits(val); \ - write_extent_buffer(token->eb, &leres, member_offset, size); \ + memcpy(token->kaddr, lebytes + part, size - part); \ } \ void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ unsigned long off, u##bits val) \ |