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Thu, 29 Jan 2026 18:09:06 +0800 From: Enze Li To: sj@kernel.org, akpm@linux-foundation.org Cc: damon@lists.linux.dev, linux-mm@kvack.org, enze.li@gmx.com, Enze Li Subject: [PATCH] mm/damon: unify address range representation with damon_addr_range Date: Thu, 29 Jan 2026 18:08:45 +0800 Message-ID: <20260129100845.281734-1-lienze@kylinos.cn> X-Mailer: git-send-email 2.52.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Stat-Signature: embdjeuzksbu1d95y8zmsxhp9zmnuo1o X-Rspamd-Queue-Id: 6FFE41C000C X-Rspam-User: X-HE-Tag: 1769681353-973884 X-HE-Meta: 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 RoQakzkk WqPkFuYmmT/VXji4Mz2IuyyxlqQxucOAbOjgnUONvtahQWQ4= 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: Currently, DAMON defines two identical structures for representing address ranges: damon_system_ram_region and damon_addr_range. Both structures share the same semantic interpretation of a half-open interval [start, end), where the start address is inclusive and the end address is exclusive. This duplication adds unnecessary redundancy and increases maintenance overhead. This patch replaces all uses of damon_system_ram_region with the more generic damon_addr_range structure, ensuring a unified type representation for address ranges within the DAMON subsystem. The change simplifies the codebase, improves readability, and avoids potential inconsistencies in future modifications. Signed-off-by: Enze Li --- mm/damon/core.c | 15 ++------------- 1 file changed, 2 insertions(+), 13 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index 70efbf22a2b4..5e2724a4f285 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -2856,20 +2856,9 @@ static int kdamond_fn(void *data) return 0; } -/* - * struct damon_system_ram_region - System RAM resource address region of - * [@start, @end). - * @start: Start address of the region (inclusive). - * @end: End address of the region (exclusive). - */ -struct damon_system_ram_region { - unsigned long start; - unsigned long end; -}; - static int walk_system_ram(struct resource *res, void *arg) { - struct damon_system_ram_region *a = arg; + struct damon_addr_range *a = arg; if (a->end - a->start < resource_size(res)) { a->start = res->start; @@ -2886,7 +2875,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end) { - struct damon_system_ram_region arg = {}; + struct damon_addr_range arg = {}; walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram); if (arg.end <= arg.start) base-commit: 0241748f8b68fc2bf637f4901b9d7ca660d177ca -- 2.52.0