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b=OWV9Zwqjp6SCQsoS8qqmQHNRel8GAHCYcF5lV7VFcRdPqRxvyktNufhT1B9y81cht Nh6OekIufSS//qGawwe1wlVuDt0OSUCcptCmhOCHMHY1k/FeIaoJoTWSc6kmXmq8/S hyeY1RQs2v8avPKP1ej2D2hh3DRxNhs8kIs5ktxOtmMLaqnc/RrO9rMtgJCZHronXT T4kR5fK9jjjF2qNZTlzE9iZwmAQCzWyrGUkzpAhsGyJQHx1c4XbqiyvMt+ZKVP2X9X xWWPIH4GBpqKo2BnJjv4ZQUvOx5+7/5x0u1pNrSNJIOxG4vV1/lXEbeHLwtfQi5Lyi VIDXo6MDVIL6w== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 5/7] mm/damon/stat: use damon_set_region_system_rams_default() Date: Tue, 28 Apr 2026 21:12:27 -0700 Message-ID: <20260429041232.90257-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260429041232.90257-1-sj@kernel.org> References: <20260429041232.90257-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: A8E9CC000E X-Rspamd-Server: rspam06 X-Stat-Signature: 37iz7q3dbhok6kebq5i3ay1sb3r86bm4 X-HE-Tag: 1777435959-311937 X-HE-Meta: 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 fZKngv4I sKh90SIkUlz9XCieJeWqXiA7ja4NY7YmgJeTNtITlCWVO5GUgnAI7C2YCs99ZkDjsNcC0rcwGwlAVUJW/yyKjWzP+x/oLsogwYXdOBRWrNkt8OKNNAom4CTXYegahAd9urPF+Zu7hUlqaTctPae8zMxx22LIbsBQnD5qmZpuqXx0B/dwC/WPwwMX7e4e4+yyKHrd7jCWeYik8LEmWupFKZhCiDPBYWjoRrY5dgMAY5INDFHugs6S9lSPIZCTgfWBdF0FxtlwNEuXGvA50PsQC3NwM3w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: damon_stat_set_moniotirng_region() is nearly a duplicate of the core function, damon_set_region_system_rams_default(). Use the core implementation. Signed-off-by: SeongJae Park --- mm/damon/stat.c | 53 +++---------------------------------------------- 1 file changed, 3 insertions(+), 50 deletions(-) diff --git a/mm/damon/stat.c b/mm/damon/stat.c index 3951b762cbddf..f4d3203e92639 100644 --- a/mm/damon/stat.c +++ b/mm/damon/stat.c @@ -148,59 +148,12 @@ static int damon_stat_damon_call_fn(void *data) return 0; } -struct damon_stat_system_ram_range_walk_arg { - bool walked; - struct resource res; -}; - -static int damon_stat_system_ram_walk_fn(struct resource *res, void *arg) -{ - struct damon_stat_system_ram_range_walk_arg *a = arg; - - if (!a->walked) { - a->walked = true; - a->res.start = res->start; - } - a->res.end = res->end; - return 0; -} - -static unsigned long damon_stat_res_to_core_addr(resource_size_t ra, - unsigned long addr_unit) -{ - /* - * Use div_u64() for avoiding linking errors related with __udivdi3, - * __aeabi_uldivmod, or similar problems. This should also improve the - * performance optimization (read div_u64() comment for the detail). - */ - if (sizeof(ra) == 8 && sizeof(addr_unit) == 4) - return div_u64(ra, addr_unit); - return ra / addr_unit; -} - -static int damon_stat_set_monitoring_region(struct damon_target *t, - unsigned long addr_unit, unsigned long min_region_sz) -{ - struct damon_addr_range addr_range; - struct damon_stat_system_ram_range_walk_arg arg = {}; - - walk_system_ram_res(0, -1, &arg, damon_stat_system_ram_walk_fn); - if (!arg.walked) - return -EINVAL; - addr_range.start = damon_stat_res_to_core_addr( - arg.res.start, addr_unit); - addr_range.end = damon_stat_res_to_core_addr( - arg.res.end + 1, addr_unit); - if (addr_range.end <= addr_range.start) - return -EINVAL; - return damon_set_regions(t, &addr_range, 1, min_region_sz); -} - static struct damon_ctx *damon_stat_build_ctx(void) { struct damon_ctx *ctx; struct damon_attrs attrs; struct damon_target *target; + unsigned long start = 0, end = 0; ctx = damon_new_ctx(); if (!ctx) @@ -230,8 +183,8 @@ static struct damon_ctx *damon_stat_build_ctx(void) if (!target) goto free_out; damon_add_target(ctx, target); - if (damon_stat_set_monitoring_region(target, ctx->addr_unit, - ctx->min_region_sz)) + if (damon_set_region_system_rams_default(target, &start, &end, + ctx->addr_unit, ctx->min_region_sz)) goto free_out; return ctx; free_out: -- 2.47.3