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| author | Alexey Budankov <[email protected]> | 2019-12-03 11:43:33 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2020-01-06 14:46:04 +0000 |
| commit | 8812ad412f851216d6c39488a7e563ccc5c604cc (patch) | |
| tree | b62268e19d0ac56d65ac8033bb45cfa86004b170 /tools/lib/bitmap.c | |
| parent | Merge tag 'perf-urgent-for-mingo-5.5-20191223' of git://git.kernel.org/pub/sc... (diff) | |
| download | kernel-8812ad412f851216d6c39488a7e563ccc5c604cc.tar.gz kernel-8812ad412f851216d6c39488a7e563ccc5c604cc.zip | |
tools bitmap: Implement bitmap_equal() operation at bitmap API
Extend tools bitmap API with bitmap_equal() implementation.
The implementation has been derived from the kernel.
Extend tools bitmap API with bitmap_free() implementation for symmetry
with bitmap_alloc() function.
Signed-off-by: Alexey Budankov <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/lib/bitmap.c')
| -rw-r--r-- | tools/lib/bitmap.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c index 38494782be06..5043747ef6c5 100644 --- a/tools/lib/bitmap.c +++ b/tools/lib/bitmap.c @@ -71,3 +71,18 @@ int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, BITMAP_LAST_WORD_MASK(bits)); return result != 0; } + +int __bitmap_equal(const unsigned long *bitmap1, + const unsigned long *bitmap2, unsigned int bits) +{ + unsigned int k, lim = bits/BITS_PER_LONG; + for (k = 0; k < lim; ++k) + if (bitmap1[k] != bitmap2[k]) + return 0; + + if (bits % BITS_PER_LONG) + if ((bitmap1[k] ^ bitmap2[k]) & BITMAP_LAST_WORD_MASK(bits)) + return 0; + + return 1; +} |