crypto: x86/sha512-avx2 - add missing vzeroupper

Since sha512_transform_rorx() uses ymm registers, execute vzeroupper
before returning from it.  This is necessary to avoid reducing the
performance of SSE code.

Fixes: e01d69cb0195 ("crypto: sha512 - Optimized SHA512 x86_64 assembly routine using AVX instructions.")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/arch/x86/crypto/sha512-avx2-asm.S b/arch/x86/crypto/sha512-avx2-asm.S
index f08496cd68708fdea7cc72cf53bcc8f8e638649a..24973f42c43ff4db465b0f2c7e4e01a97fb874e6 100644 (file)
--- a/arch/x86/crypto/sha512-avx2-asm.S
+++ b/arch/x86/crypto/sha512-avx2-asm.S
@@ -680,6 +680,7 @@ SYM_TYPED_FUNC_START(sha512_transform_rorx)
        pop     %r12
        pop     %rbx
 
+       vzeroupper
        RET
 SYM_FUNC_END(sha512_transform_rorx)