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lib: Import rol32 function from Linux

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sm3 crypto algorithm uses rol32 function from linux, so
import it. Linux base was:

commit ca91b9500108:("Merge tag 'v6.15-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbd")

Signed-off-by: Heiko Schocher <hs@nabladev.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heiko Schocher
2025-11-18 05:30:37 +01:00
committed by Tom Rini
parent 69cc92d686
commit 6a0c939b88
1 changed files with 11 additions and 0 deletions
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11
include/linux/bitops.h
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@@ -148,6 +148,17 @@ static inline unsigned long hweight_long(unsigned long w)
return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w);
}
/**
* rol32 - rotate a 32-bit value left
* @word: value to rotate
* @shift: bits to roll
*/
static inline __u32 rol32(__u32 word, unsigned int shift)
{
return (word << (shift & 31)) | (word >> ((-shift) & 31));
}
#include <asm/bitops.h>
/* linux/include/asm-generic/bitops/non-atomic.h */