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Sat, 19 Jul 2025 13:54:07 -0700 (PDT) From: Yury Norov To: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Yury Norov Subject: [PATCH 1/2] mm: cma: simplify cma_debug_show_areas() Date: Sat, 19 Jul 2025 16:53:59 -0400 Message-ID: <20250719205401.399475-2-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250719205401.399475-1-yury.norov@gmail.com> References: <20250719205401.399475-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 8221CC0004 X-Stat-Signature: ouq7jm6r3z3nyx45q84unhyaxme7it4g X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1752958449-719819 X-HE-Meta: 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 gw1i3CcT 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Yury Norov (NVIDIA) The function opencodes for_each_clear_bitrange(). Fix that and drop most of housekeeping code. Signed-off-by: Yury Norov (NVIDIA) --- mm/cma.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-) diff --git a/mm/cma.c b/mm/cma.c index 397567883a10..adc57bf7c68c 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -739,8 +739,7 @@ static int __init __cma_declare_contiguous_nid(phys_addr_t *basep, static void cma_debug_show_areas(struct cma *cma) { - unsigned long next_zero_bit, next_set_bit, nr_zero; - unsigned long start; + unsigned long start, end; unsigned long nr_part; unsigned long nbits; int r; @@ -751,22 +750,12 @@ static void cma_debug_show_areas(struct cma *cma) for (r = 0; r < cma->nranges; r++) { cmr = &cma->ranges[r]; - start = 0; nbits = cma_bitmap_maxno(cma, cmr); pr_info("range %d: ", r); - for (;;) { - next_zero_bit = find_next_zero_bit(cmr->bitmap, - nbits, start); - if (next_zero_bit >= nbits) - break; - next_set_bit = find_next_bit(cmr->bitmap, nbits, - next_zero_bit); - nr_zero = next_set_bit - next_zero_bit; - nr_part = nr_zero << cma->order_per_bit; - pr_cont("%s%lu@%lu", start ? "+" : "", nr_part, - next_zero_bit); - start = next_zero_bit + nr_zero; + for_each_clear_bitrange(start, end, cmr->bitmap, nbits) { + nr_part = (end - start) << cma->order_per_bit; + pr_cont("%s%lu@%lu", start ? "+" : "", nr_part, start); } pr_info("\n"); } -- 2.43.0