Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _ASM_GENERIC_BITOPS___FFS_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _ASM_GENERIC_BITOPS___FFS_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * __ffs - find first bit in word.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * @word: The word to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * Undefined if no bit exists, so code should check against 0 first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static __always_inline unsigned long __ffs(unsigned long word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	int num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #if BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	if ((word & 0xffffffff) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		num += 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		word >>= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	if ((word & 0xffff) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		num += 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		word >>= 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if ((word & 0xff) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		num += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		word >>= 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	if ((word & 0xf) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		num += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		word >>= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if ((word & 0x3) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		num += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		word >>= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	if ((word & 0x1) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		num += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	return num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif /* _ASM_GENERIC_BITOPS___FFS_H_ */