From c79147e4b02fa3679aebf34121b12f5097731d8a Mon Sep 17 00:00:00 2001 From: "Yury Norov (NVIDIA)" Date: Sat, 19 Jul 2025 16:54:00 -0400 Subject: [PATCH] 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: Yury Norov (NVIDIA) Acked-by: David Hildenbrand Signed-off-by: Andrew Morton --- mm/cma_debug.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/mm/cma_debug.c b/mm/cma_debug.c index fdf899532ca02..8c7d7f8e8fbd0 100644 --- a/mm/cma_debug.c +++ b/mm/cma_debug.c @@ -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; -- 2.47.2