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Mon, 03 Aug 2026 16:44:16 +0000 From: Pedro Falcato To: David Hildenbrand , Andrew Morton Cc: Pedro Falcato , Catalin Marinas , Will Deacon , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , "Matthew Wilcox (Oracle)" , Jan Kara , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kevin Brodsky , Muhammad Usama Anjum , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v2 5/6] mm: constify generic pte_get*() Date: Mon, 3 Aug 2026 17:43:59 +0100 Message-ID: <20260803164400.531199-6-pfalcato@suse.de> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260803164400.531199-1-pfalcato@suse.de> References: <20260803164400.531199-1-pfalcato@suse.de> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-5.30 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; URIBL_BLOCKED(0.00)[suse.de:email,suse.de:mid,imap1.dmz-prg2.suse.org:helo]; FREEMAIL_CC(0.00)[suse.de,arm.com,kernel.org,HansenPartnership.com,gmx.de,linux.ibm.com,ellerman.id.au,infradead.org,google.com,suse.com,suse.cz,nvidia.com,linux.alibaba.com,redhat.com,linux.dev,lists.infradead.org,vger.kernel.org,lists.ozlabs.org,kvack.org]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCPT_COUNT_TWELVE(0.00)[33]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:mid,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLxu57a9hfgn7tttf5jiwuqe5o)]; FREEMAIL_ENVRCPT(0.00)[gmx.de] None of the helpers need write access to the PTE. Constifying the param allows for const typesafety. Signed-off-by: Pedro Falcato --- include/linux/pgtable.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 8c093c119e5a..dc418553e57a 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -490,7 +490,7 @@ static inline int pudp_set_access_flags(struct vm_area_struct *vma, #endif #ifndef ptep_get -static inline pte_t ptep_get(pte_t *ptep) +static inline pte_t ptep_get(const pte_t *ptep) { return READ_ONCE(*ptep); } @@ -739,7 +739,7 @@ static inline void ptep_clear(struct mm_struct *mm, unsigned long addr, * present bit set *unless* it is 'l'. Because get_user_pages_fast() only * operates on present ptes we're safe. */ -static inline pte_t ptep_get_lockless(pte_t *ptep) +static inline pte_t ptep_get_lockless(const pte_t *ptep) { pte_t pte; @@ -777,7 +777,7 @@ static inline pmd_t pmdp_get_lockless(pmd_t *pmdp) * We require that the PTE can be read atomically. */ #ifndef ptep_get_lockless -static inline pte_t ptep_get_lockless(pte_t *ptep) +static inline pte_t ptep_get_lockless(const pte_t *ptep) { return ptep_get(ptep); } -- 2.55.0