When entering the "len & sizeof(u32)" branch, len must be less than 8. So after one operation, len must be less than 4. At this time, "len -= sizeof(u32)" is not necessary for 64-bit CPUs. A similar issue has been solved at Loongarch. Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.10-rc5&id=fea1c949f6ca5059e12de00d0483645debc5b206 Signed-off-by: Guan Wentao <guanwentao@xxxxxxxxxxxxx> Signed-off-by: WangYuli <wangyuli@xxxxxxxxxxxxx> --- arch/mips/crypto/crc32-mips.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/mips/crypto/crc32-mips.c b/arch/mips/crypto/crc32-mips.c index ec6d58008f8e..505d2d897849 100644 --- a/arch/mips/crypto/crc32-mips.c +++ b/arch/mips/crypto/crc32-mips.c @@ -94,7 +94,9 @@ static u32 crc32_mips_le_hw(u32 crc_, const u8 *p, unsigned int len) CRC32(crc, value, w); p += sizeof(u32); +#ifndef CONFIG_64BIT len -= sizeof(u32); +#endif } if (len & sizeof(u16)) { @@ -134,7 +136,9 @@ static u32 crc32c_mips_le_hw(u32 crc_, const u8 *p, unsigned int len) CRC32C(crc, value, w); p += sizeof(u32); +#ifndef CONFIG_64BIT len -= sizeof(u32); +#endif } if (len & sizeof(u16)) { -- 2.43.4
