diff options
| author | Tom Rini <trini@konsulko.com> | 2023-08-18 13:45:58 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-08-18 13:45:58 -0400 |
| commit | 3881c9fbb7fdd98f6eae5cd33f7e9abe9455a585 (patch) | |
| tree | 3522dea6d6e5bff9c2d9bcae8354e16223c5b518 /include/asm-generic/bitops/builtin-fls.h | |
| parent | 14ba0a8bbc342a677982acc787ae542b84ed7993 (diff) | |
| parent | 48f792e31b88343bfccbaf73808e3d02a2be90dc (diff) | |
Merge branch '2023-08-18-assorted-updates' into next
- Use built-in ffs/fls on ARM, fix a PIE issue in SPL on ARMv8, bcm283x
and mediatek updates, whitespace fix in UFS uclass, make CI use
"tools-only" defconfig for more tests, add TI TCA9554 GPIO support,
cache alignment fix for SCSI, and fix a problem with
SYS_MMCSD_RAW_MODE_ARGS_SECTOR in SPL.
Diffstat (limited to 'include/asm-generic/bitops/builtin-fls.h')
| -rw-r--r-- | include/asm-generic/bitops/builtin-fls.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-generic/bitops/builtin-fls.h b/include/asm-generic/bitops/builtin-fls.h new file mode 100644 index 0000000000..c8455cc288 --- /dev/null +++ b/include/asm-generic/bitops/builtin-fls.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_ +#define _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_ + +/** + * fls - find last (most-significant) bit set + * @x: the word to search + * + * This is defined the same way as ffs. + * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. + */ +static __always_inline int fls(unsigned int x) +{ + return x ? sizeof(x) * 8 - __builtin_clz(x) : 0; +} + +#endif |