xfs: split up xfs_buf_allocate_memory

Based on a patch from Christoph Hellwig.

This splits out the heap allocation and page allocation portions of
the buffer memory allocation into two separate helper functions.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Dave Chinner 2021-06-01 13:40:02 +10:00 • committed by Dave Chinner
commit 0a683794ac