The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Thanks, Sasha
------------------ original commit in Linus's tree ------------------
From fea1c949f6ca5059e12de00d0483645debc5b206 Mon Sep 17 00:00:00 2001 From: Yuli Wang wangyuli@uniontech.com Date: Tue, 19 Mar 2024 15:50:34 +0800 Subject: [PATCH] LoongArch/crypto: Clean up useless assignment operations
The LoongArch CRC32 hw acceleration is based on arch/mips/crypto/ crc32-mips.c. While the MIPS code supports both MIPS32 and MIPS64, but LoongArch32 lacks the CRC instruction. As a result, the line "len -= sizeof(u32)" is unnecessary.
Removing it can make context code style more unified and improve code readability.
Cc: stable@vger.kernel.org Reviewed-by: WANG Xuerui git@xen0n.name Suggested-by: Wentao Guan guanwentao@uniontech.com Signed-off-by: Yuli Wang wangyuli@uniontech.com Signed-off-by: Huacai Chen chenhuacai@loongson.cn --- arch/loongarch/crypto/crc32-loongarch.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/arch/loongarch/crypto/crc32-loongarch.c b/arch/loongarch/crypto/crc32-loongarch.c index a49e507af38c0..3eebea3a7b478 100644 --- a/arch/loongarch/crypto/crc32-loongarch.c +++ b/arch/loongarch/crypto/crc32-loongarch.c @@ -44,7 +44,6 @@ static u32 crc32_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
CRC32(crc, value, w); p += sizeof(u32); - len -= sizeof(u32); }
if (len & sizeof(u16)) { @@ -80,7 +79,6 @@ static u32 crc32c_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
CRC32C(crc, value, w); p += sizeof(u32); - len -= sizeof(u32); }
if (len & sizeof(u16)) {