[PATCH v3 04/13] arm64: lib: Assume a little-endian kernel in custom library routines

[Will Deacon <will@kernel.org>]

Commit 5276ea17a23c ("lib/crc: arm64: Assume a little-endian kernel")
removed all usage of the CPU_LE()/CPU_BE() macros from the arm64 CRC
assembly now that big-endian support depends on BROKEN.

Do the same for the rest of the custom arm64 library code, as well as
removing all usage of the '__LITTLE_ENDIAN' macro.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/lib/csum.c   | 17 -----------------
 arch/arm64/lib/memchr.S |  2 +-
 2 files changed, 1 insertion(+), 18 deletions(-)

diff --git a/arch/arm64/lib/csum.c b/arch/arm64/lib/csum.c
index 2432683e48a6..75db718e5b6a 100644
--- a/arch/arm64/lib/csum.c
+++ b/arch/arm64/lib/csum.c
@@ -47,11 +47,7 @@ unsigned int __no_sanitize_address do_csum(const unsigned char *buff, int len)
 	 */
 	shift = offset * 8;
 	data = *ptr++;
-#ifdef __LITTLE_ENDIAN
 	data = (data >> shift) << shift;
-#else
-	data = (data << shift) >> shift;
-#endif
 
 	/*
 	 * Body: straightforward aligned loads from here on (the paired loads
@@ -94,13 +90,8 @@ unsigned int __no_sanitize_address do_csum(const unsigned char *buff, int len)
 		len -= 16;
 		ptr += 2;
 
-#ifdef __LITTLE_ENDIAN
 		data = tmp >> 64;
 		sum64 = accumulate(sum64, tmp);
-#else
-		data = tmp;
-		sum64 = accumulate(sum64, tmp >> 64);
-#endif
 	}
 	if (len > 0) {
 		sum64 = accumulate(sum64, data);
@@ -112,11 +103,7 @@ unsigned int __no_sanitize_address do_csum(const unsigned char *buff, int len)
 	 * preserving odd/even alignment.
 	 */
 	shift = len * -8;
-#ifdef __LITTLE_ENDIAN
 	data = (data << shift) >> shift;
-#else
-	data = (data >> shift) << shift;
-#endif
 	sum64 = accumulate(sum64, data);
 
 	/* Finally, folding */
@@ -140,11 +127,7 @@ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 	dst = *(const __uint128_t *)daddr->s6_addr;
 
 	sum += (__force u32)htonl(len);
-#ifdef __LITTLE_ENDIAN
 	sum += (u32)proto << 24;
-#else
-	sum += proto;
-#endif
 	src += (src >> 64) | (src << 64);
 	dst += (dst >> 64) | (dst << 64);
 
diff --git a/arch/arm64/lib/memchr.S b/arch/arm64/lib/memchr.S
index 37a9f2a4f7f4..b14b27cb8419 100644
--- a/arch/arm64/lib/memchr.S
+++ b/arch/arm64/lib/memchr.S
@@ -63,7 +63,7 @@ L(byte_loop):
 	sub	srcin, srcin, #1
 	ret
 L(found_word):
-CPU_LE(	rev	tmp, tmp)
+	rev	tmp, tmp
 	clz	tmp, tmp
 	sub	tmp, tmp, #64
 	add	result, srcin, tmp, asr #3
-- 
2.55.0.1082.g2b9226bbc0-goog