On Sat, Dec 26, 2020 at 02:46:06PM -0700, shngmao@gmail.com wrote:

From: Sheng Mao <redacted>

To use optimized CRC implemention, the input buffer must be
unsigned long aligned. btrfs receive calculates checksum based on
read_buf, including btrfs_cmd_header (with zero-ed CRC field)
and command content. GCC attribute is added to both struct
btrfs_send_stream and read_buf to make sure read_buf is allocated
with proper alignment.

Issue: #324
Signed-off-by: Sheng Mao <redacted>

Fix added to devel, with the mentined changes: read_buf is at the
begninning and whole structure 64 bytes aligned. Thanks.