Re: [tip:x86/core 1/1] arch/x86/um/../lib/csum-partial_64.c:98:12: error: implicit declaration of function 'load_unaligned_zeropad'
From: Eric Dumazet <edumazet@google.com>
Date: 2021-11-25 06:48:03
Also in:
lkml, oe-kbuild-all
On Wed, Nov 24, 2021 at 10:32 PM Eric Dumazet [off-list ref] wrote:
- }
+ if (unlikely(odd))
+ result = ror32(result, 8);
return (__force __wsum)result;
Oh well, gcc at least removes the conditional and generates a ror and a cmov
mov %edx,%eax
ror $0x8,%eax
test %r8,%r8
cmove %edx,%eax
ret
clang keeps the cond jmp
test $0x1,%dil
je 93
rol $0x18,%eax
93: ret
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