Use thew raid5_gen_result() function to calculate raid5 parity. Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com> --- v2: Patch split --- volumes.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-)
diff --git a/volumes.c b/volumes.c index 93ce934..e78d157 100644 --- a/volumes.c +++ b/volumes.c @@ -2112,7 +2112,6 @@ int write_raid56_with_parity(struct btrfs_fs_info *info, { struct extent_buffer **ebs, *p_eb = NULL, *q_eb = NULL; int i; - int j; int ret; int alloc_size = eb->len; void **pointers; @@ -2167,18 +2166,12 @@ int write_raid56_with_parity(struct btrfs_fs_info *info, raid6_gen_syndrome(multi->num_stripes, stripe_len, pointers); } else { ebs[multi->num_stripes - 1] = p_eb; - memcpy(p_eb->data, ebs[0]->data, stripe_len); - for (j = 1; j < multi->num_stripes - 1; j++) { - for (i = 0; i < stripe_len; i += sizeof(u64)) { - u64 p_eb_data; - u64 ebs_data; - - p_eb_data = get_unaligned_64(p_eb->data + i); - ebs_data = get_unaligned_64(ebs[j]->data + i); - p_eb_data ^= ebs_data; - put_unaligned_64(p_eb_data, p_eb->data + i); - } - } + for (i = 0; i < multi->num_stripes; i++) + pointers[i] = ebs[i]->data; + ret = raid5_gen_result(multi->num_stripes, stripe_len, + multi->num_stripes - 1, pointers); + if (ret < 0) + goto out_free_split; } for (i = 0; i < multi->num_stripes; i++) { -- 2.10.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html