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| author |   Ard Biesheuvel <ardb@kernel.org> | 2022-02-23 08:07:01 +0100 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2022-03-03 10:49:20 +1200 |
| commit | 7976c1492571a5fb234c416559a0d9790855c635 (patch) | |
| tree | 34d455af015e3256902f25da54e17bb52c5aeed5 /drivers/crypto/Makefile | |
| parent | crypto: cleanup comments (diff) | |
| download | linux-dev-7976c1492571a5fb234c416559a0d9790855c635.tar.xz linux-dev-7976c1492571a5fb234c416559a0d9790855c635.zip | |
crypto: crypto_xor - use helpers for unaligned accesses
Dereferencing a misaligned pointer is undefined behavior in C, and may
result in codegen on architectures such as ARM that trigger alignments
traps and expensive fixups in software.
Instead, use the get_aligned()/put_aligned() accessors, which are cheap
or even completely free when CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y.
In the converse case, the prior alignment checks ensure that the casts
are safe, and so no unaligned accessors are necessary.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/Makefile')
0 files changed, 0 insertions, 0 deletions