From 4525462dd0db9e86bb67c10dedbbaa4f8d62697d Mon Sep 17 00:00:00 2001 From: Charlie Jenkins Date: Thu, 18 Jan 2024 14:36:45 -0800 Subject: riscv: lib: Check if output in asm goto supported The output field of an asm goto statement is not supported by all compilers. If it is not supported, fallback to the non-optimized code. Signed-off-by: Charlie Jenkins Fixes: a04c192eabfb ("riscv: Add checksum library") Link: https://lore.kernel.org/r/20240118-csum_remove_output_operands_asm_goto-v2-1-5d1b73cf93d4@rivosinc.com Signed-off-by: Palmer Dabbelt --- arch/riscv/lib/csum.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/riscv/lib') diff --git a/arch/riscv/lib/csum.c b/arch/riscv/lib/csum.c index 06ce8e7250d9..af3df5274ccb 100644 --- a/arch/riscv/lib/csum.c +++ b/arch/riscv/lib/csum.c @@ -156,6 +156,7 @@ do_csum_with_alignment(const unsigned char *buff, int len) end = (const unsigned long *)(buff + len); csum = do_csum_common(ptr, end, data); +#ifdef CC_HAS_ASM_GOTO_TIED_OUTPUT /* * Zbb support saves 6 instructions, so not worth checking without * alternatives if supported @@ -214,6 +215,7 @@ end: return csum >> 16; } no_zbb: +#endif /* CC_HAS_ASM_GOTO_TIED_OUTPUT */ #ifndef CONFIG_32BIT csum += ror64(csum, 32); csum >>= 32; -- cgit