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| author | Mikulas Patocka <mpatocka@redhat.com> | 2017-09-07 04:41:21 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-10-07 06:10:30 +0200 |
| commit | 5e1a646204deb0efd0e0bbc1730ac11dcb39f8fb (patch) | |
| tree | f9a8400f86d11aca28a00e501da6e4cab4b26d2b /kernel/padata.c | |
| parent | crypto:ccp - invoke the DMA callback in a standard way (diff) | |
| download | linux-5e1a646204deb0efd0e0bbc1730ac11dcb39f8fb.tar.xz linux-5e1a646204deb0efd0e0bbc1730ac11dcb39f8fb.zip | |
crypto: crc32-pclmul - remove useless relative addressing
In 32-bit mode, the x86 architecture can hold full 32-bit pointers.
Therefore, the code that copies the current address to the %ecx register
and uses %ecx-relative addressing is useless, we could just use absolute
addressing.
The processors have a stack of return addresses for branch prediction. If
we use a call instruction and pop the return address, it desynchronizes
the return stack and causes branch prediction misses.
This patch also moves the data to the .rodata section.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'kernel/padata.c')
0 files changed, 0 insertions, 0 deletions