Commit 7048c21e authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

crypto: arm64/crct10dif - Remove obsolete chunking logic 



This is a partial revert of commit fc754c02, which moved the logic
into C code which ensures that kernel mode NEON code does not hog the
CPU for too long.

This is no longer needed now that kernel mode NEON no longer disables
preemption, so we can drop this.

Reviewed-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 19630cf5

arch/arm64/crypto/crct10dif-ce-glue.c

+6 −24
Original line number Diff line number Diff line
@@ -37,18 +37,9 @@ static int crct10dif_update_pmull_p8(struct shash_desc *desc, const u8 *data, 
	u16 *crc = shash_desc_ctx(desc);



	if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) {

		do {

			unsigned int chunk = length;



			if (chunk > SZ_4K + CRC_T10DIF_PMULL_CHUNK_SIZE)

				chunk = SZ_4K;



		kernel_neon_begin();

			*crc = crc_t10dif_pmull_p8(*crc, data, chunk);

		*crc = crc_t10dif_pmull_p8(*crc, data, length);

		kernel_neon_end();

			data += chunk;

			length -= chunk;

		} while (length);

	} else {

		*crc = crc_t10dif_generic(*crc, data, length);

	}
@@ -62,18 +53,9 @@ static int crct10dif_update_pmull_p64(struct shash_desc *desc, const u8 *data, 
	u16 *crc = shash_desc_ctx(desc);



	if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) {

		do {

			unsigned int chunk = length;



			if (chunk > SZ_4K + CRC_T10DIF_PMULL_CHUNK_SIZE)

				chunk = SZ_4K;



		kernel_neon_begin();

			*crc = crc_t10dif_pmull_p64(*crc, data, chunk);

		*crc = crc_t10dif_pmull_p64(*crc, data, length);

		kernel_neon_end();

			data += chunk;

			length -= chunk;

		} while (length);

	} else {

		*crc = crc_t10dif_generic(*crc, data, length);

	}