diff options
author | Kees Cook <keescook@chromium.org> | 2018-08-06 16:32:16 -0700 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2018-09-06 15:12:24 -0600 |
commit | 3d0e63754fa47d65edff172c1156f44b6fca5ca1 (patch) | |
tree | fd3d733cba29c446722002093870c065b7d5961b /block | |
parent | ca16eb342ebedbf3bb1d8450048fe428895b0b65 (diff) |
drbd: Convert from ahash to shash
In preparing to remove all stack VLA usage from the kernel[1], this
removes the discouraged use of AHASH_REQUEST_ON_STACK in favor of
the smaller SHASH_DESC_ON_STACK by converting from ahash-wrapped-shash
to direct shash. By removing a layer of indirection this both improves
performance and reduces stack usage. The stack allocation will be made
a fixed size in a later patch to the crypto subsystem.
The bulk of the lines in this change are simple s/ahash/shash/, but the
main logic differences are in drbd_csum_ee() and drbd_csum_bio(), which
externalizes the page walking with k(un)map_atomic() instead of using
scattergather.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions