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bitmap: fix bitmal_clear() clearing bits in the wrong direction

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max 🍓
2026-02-08 12:47:58 +00:00
parent 9e223ca5d0
commit 687ba31d55
1 changed files with 1 additions and 1 deletions
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ds/bitmap.c
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@@ -25,7 +25,7 @@ void bitmap_set(unsigned long *map, unsigned long bit)
void bitmap_clear(unsigned long *map, unsigned long bit) void bitmap_clear(unsigned long *map, unsigned long bit)
{ {
unsigned long index = bit / BITS_PER_WORD; unsigned long index = bit / BITS_PER_WORD;
unsigned long offset = bit & (BITS_PER_WORD - 1); unsigned long offset = (BITS_PER_WORD - bit - 1) & (BITS_PER_WORD - 1);
unsigned long mask = 1ul << offset; unsigned long mask = 1ul << offset;
map[index] &= ~mask; map[index] &= ~mask;