queue-4.4/tools-include-adopt-linux-bits.h.patch

   1 From 8f5e9ea4ea676344ee84908bbead31776dd86cde Mon Sep 17 00:00:00 2001
   2 From: Arnaldo Carvalho de Melo <acme@redhat.com>
   3 Date: Tue, 25 Sep 2018 10:55:59 -0300
   4 Subject: tools include: Adopt linux/bits.h
   5
   6 From: Arnaldo Carvalho de Melo <acme@redhat.com>
   7
   8 commit ba4aa02b417f08a0bee5e7b8ed70cac788a7c854 upstream.
   9
  10 So that we reduce the difference of tools/include/linux/bitops.h to the
  11 original kernel file, include/linux/bitops.h, trying to remove the need
  12 to define BITS_PER_LONG, to avoid clashes with asm/bitsperlong.h.
  13
  14 And the things removed from tools/include/linux/bitops.h are really in
  15 linux/bits.h, so that we can have a copy and then
  16 tools/perf/check_headers.sh will tell us when new stuff gets added to
  17 linux/bits.h so that we can check if it is useful and if any adjustment
  18 needs to be done to the tools/{include,arch}/ copies.
  19
  20 Cc: Adrian Hunter <adrian.hunter@intel.com>
  21 Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com>
  22 Cc: David Ahern <dsahern@gmail.com>
  23 Cc: Jiri Olsa <jolsa@kernel.org>
  24 Cc: Namhyung Kim <namhyung@kernel.org>
  25 Cc: Wang Nan <wangnan0@huawei.com>
  26 Link: https://lkml.kernel.org/n/tip-y1sqyydvfzo0bjjoj4zsl562@git.kernel.org
  27 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
  28 [bwh: Backported to 4.4 as dependency of "x86/msr-index: Cleanup bit defines":
  29  - Drop change in check-headers.sh
  30  - Adjust context]
  31 Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
  32 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  33 ---
  34  tools/include/linux/bitops.h |    7 ++-----
  35  tools/include/linux/bits.h   |   26 ++++++++++++++++++++++++++
  36  2 files changed, 28 insertions(+), 5 deletions(-)
  37  create mode 100644 tools/include/linux/bits.h
  38
  39 --- a/tools/include/linux/bitops.h
  40 +++ b/tools/include/linux/bitops.h
  41 @@ -3,17 +3,14 @@
  42
  43  #include <asm/types.h>
  44  #include <linux/kernel.h>
  45 -#include <linux/compiler.h>
  46 -
  47  #ifndef __WORDSIZE
  48  #define __WORDSIZE (__SIZEOF_LONG__ * 8)
  49  #endif
  50
  51  #define BITS_PER_LONG __WORDSIZE
  52 +#include <linux/bits.h>
  53 +#include <linux/compiler.h>
  54
  55 -#define BIT_MASK(nr)           (1UL << ((nr) % BITS_PER_LONG))
  56 -#define BIT_WORD(nr)           ((nr) / BITS_PER_LONG)
  57 -#define BITS_PER_BYTE          8
  58  #define BITS_TO_LONGS(nr)      DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
  59  #define BITS_TO_U64(nr)                DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
  60  #define BITS_TO_U32(nr)                DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
  61 --- /dev/null
  62 +++ b/tools/include/linux/bits.h
  63 @@ -0,0 +1,26 @@
  64 +/* SPDX-License-Identifier: GPL-2.0 */
  65 +#ifndef __LINUX_BITS_H
  66 +#define __LINUX_BITS_H
  67 +#include <asm/bitsperlong.h>
  68 +
  69 +#define BIT(nr)                        (1UL << (nr))
  70 +#define BIT_ULL(nr)            (1ULL << (nr))
  71 +#define BIT_MASK(nr)           (1UL << ((nr) % BITS_PER_LONG))
  72 +#define BIT_WORD(nr)           ((nr) / BITS_PER_LONG)
  73 +#define BIT_ULL_MASK(nr)       (1ULL << ((nr) % BITS_PER_LONG_LONG))
  74 +#define BIT_ULL_WORD(nr)       ((nr) / BITS_PER_LONG_LONG)
  75 +#define BITS_PER_BYTE          8
  76 +
  77 +/*
  78 + * Create a contiguous bitmask starting at bit position @l and ending at
  79 + * position @h. For example
  80 + * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
  81 + */
  82 +#define GENMASK(h, l) \
  83 +       (((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
  84 +
  85 +#define GENMASK_ULL(h, l) \
  86 +       (((~0ULL) - (1ULL << (l)) + 1) & \
  87 +        (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))
  88 +
  89 +#endif /* __LINUX_BITS_H */