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// SPDX-License-Identifier: GPL-2.0+ OR Apache-2.0
/*
* erofs-utils/lib/bitops.c
*
* Copyright (C) 2025, Alibaba Cloud
*/
#include <erofs/bitops.h>
unsigned long erofs_find_next_bit(const unsigned long *addr,
unsigned long nbits, unsigned long start)
{
unsigned long tmp;
if (__erofs_unlikely(start >= nbits))
return nbits;
tmp = addr[start / BITS_PER_LONG];
tmp &= ~0UL << ((start) & (BITS_PER_LONG - 1));
start = round_down(start, BITS_PER_LONG);
while (!tmp) {
start += BITS_PER_LONG;
if (start >= nbits)
return nbits;
tmp = addr[start / BITS_PER_LONG];
}
return min(start + ffs_long(tmp), nbits);
}
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