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| author | Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com> | 2021-06-30 18:54:48 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-06-30 15:28:00 -0300 |
| commit | f20510d552e2941df2518c73c99fa2537575dbce (patch) | |
| tree | b4d61ef8e6a7df71d7087e9832990b7262783faa /tools/lib/bitmap.c | |
| parent | 857286e4c5ae5d2e860fd15d4628e707b434d7e5 (diff) | |
| download | linux-f20510d552e2941df2518c73c99fa2537575dbce.tar.bz2 | |
tools lib: Adopt bitmap_intersects() operation from the kernel sources
Adopt bitmap_intersects() routine that tests whether bitmaps bitmap1 and
bitmap2 intersects. This routine will be used during thread masks
initialization.
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Namhyung Kim <namhyung@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Link: http://lore.kernel.org/lkml/f75aa738d8ff8f9cffd7532d671f3ef3deb97a7c.1625065643.git.alexey.v.bayduraev@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/bitmap.c')
| -rw-r--r-- | tools/lib/bitmap.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c index f4e914712b6f..db466ef7be9d 100644 --- a/tools/lib/bitmap.c +++ b/tools/lib/bitmap.c @@ -86,3 +86,17 @@ int __bitmap_equal(const unsigned long *bitmap1, return 1; } + +int __bitmap_intersects(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 1; + + if (bits % BITS_PER_LONG) + if ((bitmap1[k] & bitmap2[k]) & BITMAP_LAST_WORD_MASK(bits)) + return 1; + return 0; +} |