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bitmap: fix bitmap_find_first_set

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Matheus
2026-04-27 00:04:48 -03:00
parent 173f36bdc3
commit 50992fabde
1 changed files with 8 additions and 7 deletions
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kernel-src/lib/bitmap.c
+8 -7
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@@ -59,17 +59,18 @@ bool bitmap_get(bitmap_t *bitmap, long idx) {
}
long bitmap_find_first_set(bitmap_t *bitmap) {
size_t loop_size = ROUND_UP(bitmap->size, sizeof(*bitmap->data)) / sizeof(*bitmap->data);
long offset = -1;
size_t bits_per_long = sizeof(*bitmap->data) * 8;
size_t loop_size = ROUND_UP(bitmap->size, bits_per_long) / bits_per_long;
for (size_t i = 0; i < loop_size; ++i) {
if (bitmap->data[i] == 0)
unsigned long word = bitmap->data[i];
if (word == 0)
continue;
offset = i * sizeof(*bitmap->data) + __builtin_ctz(bitmap->data[i]);
break;
long offset = i * bits_per_long + __builtin_ctzl(word);
if (offset < bitmap->size)
return offset;
}
return offset;
return -1;
}