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b=W1vysxspoNVNerQHqeYs1WOShiAUesk47rJlS2XseKeilVAiJAfy/laIfMN7rN2Xr SGWcCNHcK3D0hxQ+jTltWeV9xbUVaHTm4OYscVuop0sUDX+OLRPcl7AkiDQmfke8YP q5jfil2myF0r87r8pRMIdPTj1DKnqyXxwXbcAIItqutcvgo5GgNH/nXNfAHhL2duzE 8BRLAPaUF1Mh/zTYvUe0mSsxrq9fgXCjc+W1grxkZkLh8VQXEwP0W9ewuA5EReBwKT vsznSthaXo+he98sczBi1JLFdlmYMouTsETGm8HtnIUz5kc/+i1jWINyNT9+Ih2cA5 mS9dEVMXjRtPA== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 7/8] mm/damon/core: remove start, end check in damon_set_region_system_rams() Date: Sun, 5 Jul 2026 08:55:58 -0700 Message-ID: <20260705155600.96555-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260705155600.96555-1-sj@kernel.org> References: <20260705155600.96555-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: D4EB0180009 X-Stat-Signature: 84tubku9kdfsdhdoxhkw9onx7dtia5uz X-Rspam-User: X-HE-Tag: 1783266967-136083 X-HE-Meta: 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 Hp0m8VYA 4QAoVSxbjYyjCHtsQgcySdBi9l5qY65dZbRoo8pejsU65F31IKbqOJf09Qdjgw1dKtVmmj8pd6N4Lvv5CrlyEk++vftfQQr3CvEn03LvLE8e19a6mQvUFlYEnpPCu5kqofzOGGJwlKAIo08oP2QnwIrR7m9WsRG/0lzNh0qZiIDSP+NhFBUBEohN9gml/3C1O7OHwD2ah+//6WWoL+mIYbi4EBpZC1pmQRr8ZwGSLolnLT/kNyeXz74LG2Y/EvYhjnl9iGMohV7E+ls9+dQ1YYvfJVyyPH8lMsDfBY7tUhbxPN7I= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: damon_set_region_system_rams() validates user inputs to avoid creating a negative size region. But DAMON core avoids zero size, too. The check is incomplete. The complete check is done inside damon_set_regions(), which is eventually called from damon_set_region_system_rams_default(). Drop the incomplete and unnecessary check. Signed-off-by: SJ Park --- mm/damon/core.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index ca301abcb9ec5..3c5a46e1c079a 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3846,9 +3846,6 @@ int damon_set_region_system_rams_default(struct damon_target *t, { struct damon_addr_range addr_range; - if (*start > *end) - return -EINVAL; - if (!*start && !*end && !damon_find_system_rams_range(start, end, addr_unit)) return -EINVAL; -- 2.47.3