diff options
Diffstat (limited to 'arch/cris/include/arch-v32/arch/checksum.h')
| -rw-r--r-- | arch/cris/include/arch-v32/arch/checksum.h | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/cris/include/arch-v32/arch/checksum.h b/arch/cris/include/arch-v32/arch/checksum.h deleted file mode 100644 index fea1341ef244..000000000000 --- a/arch/cris/include/arch-v32/arch/checksum.h +++ /dev/null @@ -1,30 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_CRIS_ARCH_CHECKSUM_H -#define _ASM_CRIS_ARCH_CHECKSUM_H - -/* - * Check values used in TCP/UDP headers. - * - * The gain of doing this in assembler instead of C, is that C doesn't - * generate carry-additions for the 32-bit components of the - * checksum. Which means it would be necessary to split all those into - * 16-bit components and then add. - */ -static inline __wsum -csum_tcpudp_nofold(__be32 saddr, __be32 daddr, - __u32 len, __u8 proto, __wsum sum) -{ - __wsum res; - - __asm__ __volatile__ ("add.d %2, %0\n\t" - "addc %3, %0\n\t" - "addc %4, %0\n\t" - "addc 0, %0\n\t" - : "=r" (res) - : "0" (sum), "r" (daddr), "r" (saddr), \ - "r" ((len + proto) << 8)); - - return res; -} - -#endif /* _ASM_CRIS_ARCH_CHECKSUM_H */ |