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mm: cma: simplify cma_maxchunk_get()

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The function opencodes for_each_clear_bitrange().  Fix that and drop most
of housekeeping code.

Link: https://lkml.kernel.org/r/20250719205401.399475-3-yury.norov@gmail.com
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yury Norov (NVIDIA)
2025-07-19 16:54:00 -04:00
committed by Andrew Morton
parent 77c50f9147
commit c79147e4b0
1 changed files with 1 additions and 9 deletions
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10
mm/cma_debug.c
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@@ -56,16 +56,8 @@ static int cma_maxchunk_get(void *data, u64 *val)
for (r = 0; r < cma->nranges; r++) {
cmr = &cma->ranges[r];
bitmap_maxno = cma_bitmap_maxno(cma, cmr);
end = 0;
for (;;) {
start = find_next_zero_bit(cmr->bitmap,
bitmap_maxno, end);
if (start >= bitmap_maxno)
break;
end = find_next_bit(cmr->bitmap, bitmap_maxno,
start);
for_each_clear_bitrange(start, end, cmr->bitmap, bitmap_maxno)
maxchunk = max(end - start, maxchunk);
}
}
spin_unlock_irq(&cma->lock);
*val = (u64)maxchunk << cma->order_per_bit;