tools: Copy the bitops files accessed from the kernel and check for drift
copy some more kernel files accessed from tools/, check for drift. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-omz8xdyvvxgjiuqzwj6ecm6j@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
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de1e17b1d0
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#include "../../../../include/asm-generic/bitops/__fls.h"
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#ifndef _ASM_GENERIC_BITOPS___FLS_H_
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#define _ASM_GENERIC_BITOPS___FLS_H_
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#include <asm/types.h>
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/**
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* __fls - find last (most-significant) set bit in a long word
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* @word: the word to search
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*
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* Undefined if no set bit exists, so code should check against 0 first.
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*/
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static __always_inline unsigned long __fls(unsigned long word)
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{
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int num = BITS_PER_LONG - 1;
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#if BITS_PER_LONG == 64
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if (!(word & (~0ul << 32))) {
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num -= 32;
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word <<= 32;
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}
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#endif
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if (!(word & (~0ul << (BITS_PER_LONG-16)))) {
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num -= 16;
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word <<= 16;
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}
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if (!(word & (~0ul << (BITS_PER_LONG-8)))) {
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num -= 8;
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word <<= 8;
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}
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if (!(word & (~0ul << (BITS_PER_LONG-4)))) {
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num -= 4;
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word <<= 4;
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}
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if (!(word & (~0ul << (BITS_PER_LONG-2)))) {
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num -= 2;
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word <<= 2;
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}
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if (!(word & (~0ul << (BITS_PER_LONG-1))))
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num -= 1;
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return num;
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}
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#endif /* _ASM_GENERIC_BITOPS___FLS_H_ */
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@ -1 +1,25 @@
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#include "../../../../include/asm-generic/bitops/arch_hweight.h"
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#ifndef _ASM_GENERIC_BITOPS_ARCH_HWEIGHT_H_
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#define _ASM_GENERIC_BITOPS_ARCH_HWEIGHT_H_
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#include <asm/types.h>
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static inline unsigned int __arch_hweight32(unsigned int w)
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{
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return __sw_hweight32(w);
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}
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static inline unsigned int __arch_hweight16(unsigned int w)
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{
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return __sw_hweight16(w);
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}
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static inline unsigned int __arch_hweight8(unsigned int w)
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{
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return __sw_hweight8(w);
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}
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static inline unsigned long __arch_hweight64(__u64 w)
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{
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return __sw_hweight64(w);
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}
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#endif /* _ASM_GENERIC_BITOPS_HWEIGHT_H_ */
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@ -1 +1,43 @@
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#include "../../../../include/asm-generic/bitops/const_hweight.h"
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#ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_
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#define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_
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/*
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* Compile time versions of __arch_hweightN()
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*/
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#define __const_hweight8(w) \
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((unsigned int) \
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((!!((w) & (1ULL << 0))) + \
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(!!((w) & (1ULL << 1))) + \
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(!!((w) & (1ULL << 2))) + \
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(!!((w) & (1ULL << 3))) + \
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(!!((w) & (1ULL << 4))) + \
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(!!((w) & (1ULL << 5))) + \
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(!!((w) & (1ULL << 6))) + \
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(!!((w) & (1ULL << 7)))))
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#define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 ))
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#define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16))
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#define __const_hweight64(w) (__const_hweight32(w) + __const_hweight32((w) >> 32))
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/*
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* Generic interface.
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*/
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#define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w))
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#define hweight16(w) (__builtin_constant_p(w) ? __const_hweight16(w) : __arch_hweight16(w))
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#define hweight32(w) (__builtin_constant_p(w) ? __const_hweight32(w) : __arch_hweight32(w))
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#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w))
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/*
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* Interface for known constant arguments
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*/
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#define HWEIGHT8(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight8(w))
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#define HWEIGHT16(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight16(w))
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#define HWEIGHT32(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight32(w))
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#define HWEIGHT64(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight64(w))
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/*
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* Type invariant interface to the compile time constant hweight functions.
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*/
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#define HWEIGHT(w) HWEIGHT64((u64)w)
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#endif /* _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ */
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@ -1 +1,41 @@
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#include "../../../../include/asm-generic/bitops/fls.h"
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#ifndef _ASM_GENERIC_BITOPS_FLS_H_
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#define _ASM_GENERIC_BITOPS_FLS_H_
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/**
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* fls - find last (most-significant) bit set
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* @x: the word to search
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*
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* This is defined the same way as ffs.
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* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
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*/
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static __always_inline int fls(int x)
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{
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int r = 32;
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if (!x)
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return 0;
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if (!(x & 0xffff0000u)) {
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x <<= 16;
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r -= 16;
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}
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if (!(x & 0xff000000u)) {
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x <<= 8;
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r -= 8;
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}
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if (!(x & 0xf0000000u)) {
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x <<= 4;
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r -= 4;
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}
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if (!(x & 0xc0000000u)) {
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x <<= 2;
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r -= 2;
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}
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if (!(x & 0x80000000u)) {
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x <<= 1;
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r -= 1;
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}
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return r;
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}
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#endif /* _ASM_GENERIC_BITOPS_FLS_H_ */
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@ -1 +1,36 @@
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#include "../../../../include/asm-generic/bitops/fls64.h"
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#ifndef _ASM_GENERIC_BITOPS_FLS64_H_
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#define _ASM_GENERIC_BITOPS_FLS64_H_
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#include <asm/types.h>
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/**
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* fls64 - find last set bit in a 64-bit word
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* @x: the word to search
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*
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* This is defined in a similar way as the libc and compiler builtin
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* ffsll, but returns the position of the most significant set bit.
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*
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* fls64(value) returns 0 if value is 0 or the position of the last
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* set bit if value is nonzero. The last (most significant) bit is
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* at position 64.
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*/
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#if BITS_PER_LONG == 32
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static __always_inline int fls64(__u64 x)
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{
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__u32 h = x >> 32;
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if (h)
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return fls(h) + 32;
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return fls(x);
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}
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#elif BITS_PER_LONG == 64
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static __always_inline int fls64(__u64 x)
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{
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if (x == 0)
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return 0;
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return __fls(x) + 1;
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}
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#else
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#error BITS_PER_LONG not 32 or 64
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#endif
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#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */
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@ -77,11 +77,6 @@ tools/include/linux/stringify.h
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tools/include/linux/types.h
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tools/include/linux/err.h
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tools/include/linux/bitmap.h
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include/asm-generic/bitops/arch_hweight.h
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include/asm-generic/bitops/const_hweight.h
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include/asm-generic/bitops/fls64.h
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include/asm-generic/bitops/__fls.h
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include/asm-generic/bitops/fls.h
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include/linux/list.h
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include/linux/hash.h
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tools/arch/*/include/uapi/asm/perf_regs.h
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@ -411,6 +411,21 @@ $(PERF_IN): prepare FORCE
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@(test -f ../../arch/arm64/include/uapi/asm/kvm.h && ( \
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(diff -B ../arch/arm64/include/uapi/asm/kvm.h ../../arch/arm64/include/uapi/asm/kvm.h >/dev/null) \
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|| echo "Warning: tools/arch/arm64/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
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@(test -f ../../include/asm-generic/bitops/arch_hweight.h && ( \
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(diff -B ../include/asm-generic/bitops/arch_hweight.h ../../include/asm-generic/bitops/arch_hweight.h >/dev/null) \
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|| echo "Warning: tools/include/asm-generic/bitops/arch_hweight.h differs from kernel" >&2 )) || true
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@(test -f ../../include/asm-generic/bitops/const_hweight.h && ( \
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(diff -B ../include/asm-generic/bitops/const_hweight.h ../../include/asm-generic/bitops/const_hweight.h >/dev/null) \
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|| echo "Warning: tools/include/asm-generic/bitops/const_hweight.h differs from kernel" >&2 )) || true
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@(test -f ../../include/asm-generic/bitops/__fls.h && ( \
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(diff -B ../include/asm-generic/bitops/__fls.h ../../include/asm-generic/bitops/__fls.h >/dev/null) \
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|| echo "Warning: tools/include/asm-generic/bitops/__fls.h differs from kernel" >&2 )) || true
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@(test -f ../../include/asm-generic/bitops/fls.h && ( \
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(diff -B ../include/asm-generic/bitops/fls.h ../../include/asm-generic/bitops/fls.h >/dev/null) \
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|| echo "Warning: tools/include/asm-generic/bitops/fls.h differs from kernel" >&2 )) || true
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@(test -f ../../include/asm-generic/bitops/fls64.h && ( \
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(diff -B ../include/asm-generic/bitops/fls64.h ../../include/asm-generic/bitops/fls64.h >/dev/null) \
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|| echo "Warning: tools/include/asm-generic/bitops/fls64.h differs from kernel" >&2 )) || true
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$(Q)$(MAKE) $(build)=perf
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$(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)
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