Btrfs: reduce stack in cow_file_range

The fs/btrfs/inode.c code to run delayed allocation during writout
needed some stack usage optimization.  This is the first pass, it does
the check for compression earlier on, which allows us to do the common
(no compression) case higher up in the call chain.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
1 file changed