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Fri, 24 Jul 2026 10:20:24 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 4CtyNmg8Y2oSaQAAD6G6ig (envelope-from ); Fri, 24 Jul 2026 10:20:24 +0000 From: Pedro Falcato To: Andrew Morton , David Hildenbrand 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 2/5] mm/arm64: constify pte_get*() and contpte get logic Date: Fri, 24 Jul 2026 11:20:14 +0100 Message-ID: <20260724102017.141532-3-pfalcato@suse.de> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260724102017.141532-1-pfalcato@suse.de> References: <20260724102017.141532-1-pfalcato@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -1.30 X-Spam-Level: X-Spam-Flag: NO X-Spamd-Result: default: False [-1.30 / 50.00]; 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]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:email,suse.de:mid]; RCPT_COUNT_TWELVE(0.00)[33]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; 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]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLxu57a9hfgn7tttf5jiwuqe5o)]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_ENVRCPT(0.00)[gmx.de] None of the contpte code needs write access to the PTEs. Signed-off-by: Pedro Falcato --- arch/arm64/include/asm/pgtable.h | 10 +++++----- arch/arm64/mm/contpte.c | 4 ++-- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index a2681d755358..043bc0649cee 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -378,7 +378,7 @@ static inline void __set_pte(pte_t *ptep, pte_t pte) __set_pte_complete(pte); } -static inline pte_t __ptep_get(pte_t *ptep) +static inline pte_t __ptep_get(const pte_t *ptep) { return READ_ONCE(*ptep); } @@ -1652,8 +1652,8 @@ extern void __contpte_try_fold(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); extern void __contpte_try_unfold(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); -extern pte_t contpte_ptep_get(pte_t *ptep, pte_t orig_pte); -extern pte_t contpte_ptep_get_lockless(pte_t *orig_ptep); +extern pte_t contpte_ptep_get(const pte_t *ptep, pte_t orig_pte); +extern pte_t contpte_ptep_get_lockless(const pte_t *orig_ptep); extern void contpte_set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, unsigned int nr); extern void contpte_clear_full_ptes(struct mm_struct *mm, unsigned long addr, @@ -1732,7 +1732,7 @@ static inline unsigned int pte_batch_hint(pte_t *ptep, pte_t pte) */ #define ptep_get ptep_get -static inline pte_t ptep_get(pte_t *ptep) +static inline pte_t ptep_get(const pte_t *ptep) { pte_t pte = __ptep_get(ptep); @@ -1743,7 +1743,7 @@ static inline pte_t ptep_get(pte_t *ptep) } #define ptep_get_lockless ptep_get_lockless -static inline pte_t ptep_get_lockless(pte_t *ptep) +static inline pte_t ptep_get_lockless(const pte_t *ptep) { pte_t pte = __ptep_get(ptep); diff --git a/arch/arm64/mm/contpte.c b/arch/arm64/mm/contpte.c index 2de12656b4d8..3853ecd2cee9 100644 --- a/arch/arm64/mm/contpte.c +++ b/arch/arm64/mm/contpte.c @@ -310,7 +310,7 @@ void __contpte_try_unfold(struct mm_struct *mm, unsigned long addr, } EXPORT_SYMBOL_GPL(__contpte_try_unfold); -pte_t contpte_ptep_get(pte_t *ptep, pte_t orig_pte) +pte_t contpte_ptep_get(const pte_t *ptep, pte_t orig_pte) { /* * Gather access/dirty bits, which may be populated in any of the ptes @@ -367,7 +367,7 @@ static inline bool contpte_is_consistent(pte_t pte, unsigned long pfn, pgprot_val(prot) == pgprot_val(orig_prot); } -pte_t contpte_ptep_get_lockless(pte_t *orig_ptep) +pte_t contpte_ptep_get_lockless(const pte_t *orig_ptep) { /* * The ptep_get_lockless() API requires us to read and return *orig_ptep -- 2.55.0