summaryrefslogtreecommitdiffstats
path: root/lib/bitmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/bitmap.c')
-rw-r--r--lib/bitmap.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 09522af227..b976928549 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -348,6 +348,13 @@ unsigned int __bitmap_weight_and(const unsigned long *bitmap1,
}
EXPORT_SYMBOL(__bitmap_weight_and);
+unsigned int __bitmap_weight_andnot(const unsigned long *bitmap1,
+ const unsigned long *bitmap2, unsigned int bits)
+{
+ return BITMAP_WEIGHT(bitmap1[idx] & ~bitmap2[idx], bits);
+}
+EXPORT_SYMBOL(__bitmap_weight_andnot);
+
void __bitmap_set(unsigned long *map, unsigned int start, int len)
{
unsigned long *p = map + BIT_WORD(start);