Commit 72cb5123 authored by Ard Biesheuvel's avatar Ard Biesheuvel
Browse files

crypto/arm64: nhpoly1305 - Switch to 'ksimd' scoped guard API 



Switch to the more abstract 'scoped_ksimd()' API, which will be modified
in a future patch to transparently allocate a kernel mode FP/SIMD state
buffer on the stack, so that kernel mode FP/SIMD code remains
preemptible in principe, but without the memory overhead that adds 528
bytes to the size of struct task_struct.

Reviewed-by: default avatarEric Biggers <ebiggers@kernel.org>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 87c9b04e

arch/arm64/crypto/nhpoly1305-neon-glue.c

+2 −3
Original line number Diff line number Diff line
@@ -25,9 +25,8 @@ static int nhpoly1305_neon_update(struct shash_desc *desc, 
	do {

		unsigned int n = min_t(unsigned int, srclen, SZ_4K);



		kernel_neon_begin();

		scoped_ksimd()

			crypto_nhpoly1305_update_helper(desc, src, n, nh_neon);

		kernel_neon_end();

		src += n;

		srclen -= n;

	} while (srclen);