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[2003:dc:6f1d:f00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-61eaf5883b6sm255566a12.20.2025.09.01.05.30.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Sep 2025 05:30:42 -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 v5 05/12] mm: constify process_shares_mm() for improved const-correctness Date: Mon, 1 Sep 2025 14:30:21 +0200 Message-ID: <20250901123028.3383461-6-max.kellermann@ionos.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250901123028.3383461-1-max.kellermann@ionos.com> References: <20250901123028.3383461-1-max.kellermann@ionos.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 | 7 ++++--- 2 files changed, 5 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 */ =20 -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); =20 void drop_slab(void); =20 diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 17650f0b516e..6a888a5de2a4 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -490,12 +490,13 @@ 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 *const p, + const struct mm_struct *const mm) { - struct task_struct *t; + const struct task_struct *t; =20 for_each_thread(p, t) { - struct mm_struct *t_mm =3D READ_ONCE(t->mm); + const struct mm_struct *t_mm =3D READ_ONCE(t->mm); if (t_mm) return t_mm =3D=3D mm; } --=20 2.47.2