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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-22 10:22:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-22 10:22:45 -0700 |
| commit | 1e3cd03c54b76b4cbc8b31256dc3f18c417a6876 (patch) | |
| tree | 6c7f793b4bbc2f063e289230e1527cd45245b908 /tools/include/linux/bitops.h | |
| parent | 4f55aa85a8746e5e255c46c98c031e143605e2a0 (diff) | |
| parent | fea1c949f6ca5059e12de00d0483645debc5b206 (diff) | |
| download | linux-1e3cd03c54b76b4cbc8b31256dc3f18c417a6876.tar.gz | |
Merge tag 'loongarch-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Add objtool support for LoongArch
- Add ORC stack unwinder support for LoongArch
- Add kernel livepatching support for LoongArch
- Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig
- Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig
- Some bug fixes and other small changes
* tag 'loongarch-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
LoongArch/crypto: Clean up useless assignment operations
LoongArch: Define the __io_aw() hook as mmiowb()
LoongArch: Remove superfluous flush_dcache_page() definition
LoongArch: Move {dmw,tlb}_virt_to_page() definition to page.h
LoongArch: Change __my_cpu_offset definition to avoid mis-optimization
LoongArch: Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig
LoongArch: Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig
LoongArch: Add kernel livepatching support
LoongArch: Add ORC stack unwinder support
objtool: Check local label in read_unwind_hints()
objtool: Check local label in add_dead_ends()
objtool/LoongArch: Enable orc to be built
objtool/x86: Separate arch-specific and generic parts
objtool/LoongArch: Implement instruction decoder
objtool/LoongArch: Enable objtool to be built
Diffstat (limited to 'tools/include/linux/bitops.h')
| -rw-r--r-- | tools/include/linux/bitops.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/linux/bitops.h b/tools/include/linux/bitops.h index f18683b95ea673..7319f6ced10860 100644 --- a/tools/include/linux/bitops.h +++ b/tools/include/linux/bitops.h @@ -87,4 +87,15 @@ static inline __u32 rol32(__u32 word, unsigned int shift) return (word << shift) | (word >> ((-shift) & 31)); } +/** + * sign_extend64 - sign extend a 64-bit value using specified bit as sign-bit + * @value: value to sign extend + * @index: 0 based bit index (0<=index<64) to sign bit + */ +static __always_inline __s64 sign_extend64(__u64 value, int index) +{ + __u8 shift = 63 - index; + return (__s64)(value << shift) >> shift; +} + #endif |