From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f49.google.com (mail-ej1-f49.google.com [209.85.218.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E0CED2765C1 for ; Mon, 1 Sep 2025 20:50:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756759840; cv=none; b=sIczIPU4t07yW8wWHGvhdJegucssOtIGKNHFbKMn5tvJHvHKHqx8VKZXforEQBzOHbWAdN61k+yAbrrop5Xf0OrMSG9NP2J39/Mw4X+xGR1i1DuG3niBjOC5QSs24f3Wz8S14bANd0UmfHmNDulYyf2jL6r4ZFAcjqrSoJ2vsu0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756759840; c=relaxed/simple; bh=pIfWjTspfVpzMSCvftG/V3B9Wm60B/72pG+k5Selb38=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UNWjhpkOStiJbXliEIm3e71gdfM0jJXnQKzf/Ob31i6e2rAavsrAZoEPvdKDjhJwmTO9+IOeBOUfilgqg1PbUP5yM1Q4oSj+Lv2D40s3ZYBtyNy4sgKIigXC9tJLASBfEGsZSFtLqYLHFYo7rON9/y9U9kw6e8fDQDrZ1Q3ZWz8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=ionos.com; spf=pass smtp.mailfrom=ionos.com; dkim=pass (2048-bit key) header.d=ionos.com header.i=@ionos.com header.b=WgByGC6N; arc=none smtp.client-ip=209.85.218.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=ionos.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ionos.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ionos.com header.i=@ionos.com header.b="WgByGC6N" Received: by mail-ej1-f49.google.com with SMTP id a640c23a62f3a-b043a33b060so133014566b.1 for ; Mon, 01 Sep 2025 13:50:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ionos.com; s=google; t=1756759837; x=1757364637; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=1NuH6wEtYyVWN8h/tjwWnU8YD95rrkeNOHDYWS/pAsg=; b=WgByGC6NSlJR76DFMsCh3TbOuWDHYmmut9svV5zqWVLCNb2irhPSefTDsy3Fgt1xAe /qZFWmgwyplyxGVhxeJBKnndKGspwrntEcGMqeGDtGCZiK19PtNEAkGkQKdvO7vKZCh2 UO9hew9rsRZXQ0fjM5K1UJDO/+PYrxysRjn8132+uVCHCJ0H7R37uyX9DlAEniWYoHAp pdvbi0pcxU7/l9sV/Q6GcEh1iPXnejY6x/AQ8aHXUGQfKEFSKFk4wrGyyVj/VqetKIIj prE+bb+OrNfy+D9+paZyG3U6vLfEfQbVbzKBUM2Jva+/Mmmy91D3nJOQQmemKZ02jknX oYcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756759837; x=1757364637; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=1NuH6wEtYyVWN8h/tjwWnU8YD95rrkeNOHDYWS/pAsg=; b=RRJfW0ofyXEv3N0E2B1fR4aZwiA5Vjph5KEpgTzyCuK4/zmNfgeOsULLRzALo8UUCT BLkvZUibwBzLHuNK4gMeliQCZplEH9Jd7bZ5yr3D8j9pzGz3euetMNRfb4BhZd71zP0F YW6oQAJ8XW6A02+iuwopkTHVQWCAmlq6e4DrhlQcf5I/vqO1N5Z6WEX831nFlKpDqYtF Q4tS0s9loXMcDDjF/DmXihLcqHkKRTGyS3KYAVrbv1dEe0pizJRqowJdPZV898Hin6Gg 7sYqNFDHptCSWBIqYyo6YSV3TtJaznEwO2zfyTJGFOZEwgGrD1BzNEv/erYMYZNA25TV IjBw== X-Forwarded-Encrypted: i=1; AJvYcCXKLw+pL6pu7qovxIethen7iRq9GdDCkJitZ8ODFv9yApzAOoGZ4gfa9RtNTLVBDcHpwsrOFES5CmyZeaM=@vger.kernel.org X-Gm-Message-State: AOJu0YzxU3oW7ofRxYMxSFQP9lGMjrjJOjy1Z9myXcgiJ9Z5Uh+5K1Bv gC2TlOyvkCgXwXDIHfCwB3LkQkx1Rr5BSXO8YeyTpQXEsWRYY/VnF/1XpnsHCHyDtPs= X-Gm-Gg: ASbGncvWMuHLjSarWEyiv2zXHwb7DUAraWwBEphPpJcBePx6Evkto5B2bEzNf/t/N71 xcF4sQOWLkhYSiTsvmqIYEWaFgRXLwf2jbWia2drxAFVMi6eBJJVDjcZCSWClTAEj4ABA3WdF/0 9YfRuwSdeZam7UPFNZP1qIEUBYUlA15Pll3WgbB7tu/MAelY5fJhc6S12wZNJfNQ/suFiWga88z wk7c+L5QDtYJ4Eay8vo67H5xxmDbyEi4hR2SSHbQBQnEs/RYYnigmOsiG7jjDw9by5Etw3jIwY6 sf04rZSSo812vCaaxe9BRZVynEBpHXPqOk4jZbNbDdQAweQKysuChtB5glVYRw9qVjhCE1gaj5K n+G6b/ujgNaHBxtK3CIsJalmpvCS+uyuGdxosao5wQlovWegIfkwdaivjqkj2FFUnToEzULwk04 LMLiufRpiHJyyxHMERbdmRHQ== X-Google-Smtp-Source: AGHT+IFXutjj9GtlvsHvyB1kBP2ci7mQOIWVVvptrXf9bm8LYmlGCi75h3LAGpjp/G/Rnzqw/keEdA== X-Received: by 2002:a17:907:3e89:b0:af9:e1f0:cd30 with SMTP id a640c23a62f3a-b01df53b7c4mr910004866b.60.1756759837088; Mon, 01 Sep 2025 13:50:37 -0700 (PDT) Received: from raven.intern.cm-ag (p200300dc6f1d0f00023064fffe740809.dip0.t-ipconnect.de. [2003:dc:6f1d:f00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-afefcbd9090sm937339066b.69.2025.09.01.13.50.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Sep 2025 13:50:36 -0700 (PDT) From: Max Kellermann To: akpm@linux-foundation.org, david@redhat.com, axelrasmussen@google.com, yuanchu@google.com, willy@infradead.org, hughd@google.com, mhocko@suse.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, vishal.moola@gmail.com, linux@armlinux.org.uk, James.Bottomley@HansenPartnership.com, deller@gmx.de, agordeev@linux.ibm.com, gerald.schaefer@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, davem@davemloft.net, andreas@gaisler.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, chris@zankel.net, jcmvbkbc@gmail.com, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, weixugc@google.com, baolin.wang@linux.alibaba.com, rientjes@google.com, shakeel.butt@linux.dev, max.kellermann@ionos.com, thuth@redhat.com, broonie@kernel.org, osalvador@suse.de, jfalempe@redhat.com, mpe@ellerman.id.au, nysal@linux.ibm.com, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v6 05/12] mm: constify process_shares_mm() for improved const-correctness Date: Mon, 1 Sep 2025 22:50:14 +0200 Message-ID: <20250901205021.3573313-6-max.kellermann@ionos.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250901205021.3573313-1-max.kellermann@ionos.com> References: <20250901205021.3573313-1-max.kellermann@ionos.com> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This function only reads from the pointer arguments. Local (loop) variables are also annotated with `const` to clarify that these will not be written to. Signed-off-by: Max Kellermann Reviewed-by: Lorenzo Stoakes --- include/linux/mm.h | 2 +- mm/oom_kill.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 18deb14cb1f5..f70c6b4d5f80 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3840,7 +3840,7 @@ static inline int in_gate_area(struct mm_struct *mm, unsigned long addr) } #endif /* __HAVE_ARCH_GATE_AREA */ -extern bool process_shares_mm(struct task_struct *p, struct mm_struct *mm); +bool process_shares_mm(const struct task_struct *p, const struct mm_struct *mm); void drop_slab(void); diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 17650f0b516e..58bd4cf71d52 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -490,12 +490,12 @@ static bool oom_killer_disabled __read_mostly; * task's threads: if one of those is using this mm then this task was also * using it. */ -bool process_shares_mm(struct task_struct *p, struct mm_struct *mm) +bool process_shares_mm(const struct task_struct *p, const struct mm_struct *mm) { - struct task_struct *t; + const struct task_struct *t; for_each_thread(p, t) { - struct mm_struct *t_mm = READ_ONCE(t->mm); + const struct mm_struct *t_mm = READ_ONCE(t->mm); if (t_mm) return t_mm == mm; } -- 2.47.2