Commit c79147e4 authored by Yury Norov (NVIDIA)'s avatar Yury Norov (NVIDIA) Committed by Andrew Morton
Browse files

mm: cma: simplify cma_maxchunk_get() 

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: default avatarYury Norov (NVIDIA) <yury.norov@gmail.com>
Acked-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 77c50f91

mm/cma_debug.c

+1 −9
Original line number Diff line number Diff line
@@ -56,17 +56,9 @@ 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;