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Fri, 10 Apr 2026 15:25:15 +0000 (UTC) X-Farcaster-Flow-ID: 788f29e3-7b60-44a3-97cf-eb3ae81457f6 Received: from EX19D027UEC003.ant.amazon.com (10.252.137.250) by EX19MTAUEC002.ant.amazon.com (10.252.135.253) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.37; Fri, 10 Apr 2026 15:25:14 +0000 Received: from [192.168.12.97] (10.106.82.30) by EX19D027UEC003.ant.amazon.com (10.252.137.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.37; Fri, 10 Apr 2026 15:25:02 +0000 Message-ID: <547aa730-8cc9-4fd9-94d5-e669aa7bcf87@amazon.com> Date: Fri, 10 Apr 2026 16:25:00 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Reply-To: Subject: Re: [PATCH v11 01/16] set_memory: set_direct_map_* to take address To: Ackerley Tng , "Kalyazin, Nikita" , "kvm@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.linux.dev" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "bpf@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , "kernel@xen0n.name" , "linux-riscv@lists.infradead.org" , "linux-s390@vger.kernel.org" , "loongarch@lists.linux.dev" , "linux-pm@vger.kernel.org" CC: "pbonzini@redhat.com" , "corbet@lwn.net" , "maz@kernel.org" , "oupton@kernel.org" , "joey.gouly@arm.com" , "suzuki.poulose@arm.com" , "yuzenghui@huawei.com" , "catalin.marinas@arm.com" , "will@kernel.org" , "seanjc@google.com" , "tglx@kernel.org" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "luto@kernel.org" , "peterz@infradead.org" , "willy@infradead.org" , "akpm@linux-foundation.org" , "david@kernel.org" , "lorenzo.stoakes@oracle.com" , "vbabka@kernel.org" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "ast@kernel.org" , "daniel@iogearbox.net" , "andrii@kernel.org" , "martin.lau@linux.dev" , "eddyz87@gmail.com" , "song@kernel.org" , "yonghong.song@linux.dev" , "john.fastabend@gmail.com" , "kpsingh@kernel.org" , "sdf@fomichev.me" , "haoluo@google.com" , "jolsa@kernel.org" , "jgg@ziepe.ca" , "jhubbard@nvidia.com" , "peterx@redhat.com" , "jannh@google.com" , "pfalcato@suse.de" , "skhan@linuxfoundation.org" , "riel@surriel.com" , "ryan.roberts@arm.com" , "jgross@suse.com" , "yu-cheng.yu@intel.com" , "kas@kernel.org" , "coxu@redhat.com" , "kevin.brodsky@arm.com" , "yosry@kernel.org" , "ajones@ventanamicro.com" , "maobibo@loongson.cn" , "tabba@google.com" , "prsampat@amd.com" , "wu.fei9@sanechips.com.cn" , "mlevitsk@redhat.com" , "jmattson@google.com" , "jthoughton@google.com" , "agordeev@linux.ibm.com" , "alex@ghiti.fr" , "aou@eecs.berkeley.edu" , "borntraeger@linux.ibm.com" , "chenhuacai@kernel.org" , "dev.jain@arm.com" , "gor@linux.ibm.com" , "hca@linux.ibm.com" , "palmer@dabbelt.com" , "pjw@kernel.org" , "shijie@os.amperecomputing.com" , "svens@linux.ibm.com" , "thuth@redhat.com" , "wyihan@google.com" , "yang@os.amperecomputing.com" , "Jonathan.Cameron@huawei.com" , "Liam.Howlett@oracle.com" , "urezki@gmail.com" , "zhengqi.arch@bytedance.com" , "gerald.schaefer@linux.ibm.com" , "jiayuan.chen@shopee.com" , "lenb@kernel.org" , "osalvador@suse.de" , "pavel@kernel.org" , "rafael@kernel.org" , "vannapurve@google.com" , "jackmanb@google.com" , "aneesh.kumar@kernel.org" , "patrick.roy@linux.dev" , "Thomson, Jack" , "Itazuri, Takahiro" , "Manwaring, Derek" References: <20260317141031.514-1-kalyazin@amazon.com> <20260317141031.514-2-kalyazin@amazon.com> Content-Language: en-US From: Nikita Kalyazin Autocrypt: addr=kalyazin@amazon.com; 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>> } >> >> -int set_direct_map_default_noflush(struct page *page) >> +int set_direct_map_default_noflush(const void *addr) >> { >> - unsigned long addr = (unsigned long)page_address(page); >> - >> - if (addr < vm_map_base) >> + if ((unsigned long)addr < vm_map_base) >> return 0; >> >> - return __set_memory(addr, 1, PAGE_KERNEL, __pgprot(0)); >> + return __set_memory((unsigned long)addr, 1, PAGE_KERNEL, __pgprot(0)); >> } >> >> -int set_direct_map_invalid_noflush(struct page *page) >> +int set_direct_map_invalid_noflush(const void *addr) >> { >> - unsigned long addr = (unsigned long)page_address(page); >> - >> - if (addr < vm_map_base) >> + if ((unsigned long)addr < vm_map_base) >> return 0; >> >> - return __set_memory(addr, 1, __pgprot(0), __pgprot(_PAGE_PRESENT | _PAGE_VALID)); >> + return __set_memory((unsigned long)addr, 1, __pgprot(0), >> + __pgprot(_PAGE_PRESENT | _PAGE_VALID)); >> } >> >> -int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) >> +int set_direct_map_valid_noflush(const void *addr, unsigned long numpages, >> + bool valid) >> { >> - unsigned long addr = (unsigned long)page_address(page); >> pgprot_t set, clear; >> >> - if (addr < vm_map_base) >> + if ((unsigned long)addr < vm_map_base) >> return 0; >> >> if (valid) { >> @@ -234,5 +231,5 @@ int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) >> clear = __pgprot(_PAGE_PRESENT | _PAGE_VALID); >> } >> >> - return __set_memory(addr, 1, set, clear); >> + return __set_memory((unsigned long)addr, 1, set, clear); > > Sashiko also spotted that there is a hard-coded 1 here. Before this > change, it was already hard-coded to 1. Not sure if this is a > bug. > > Could this be addressed in a separate patch series? Yes, I agree, it looks out of scope for this series. > >> } >> >> [...snip...] >> >> diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c >> index 40581a720fe8..6aea1f470fd5 100644 >> --- a/arch/x86/mm/pat/set_memory.c >> +++ b/arch/x86/mm/pat/set_memory.c >> @@ -2587,9 +2587,9 @@ int set_pages_rw(struct page *page, int numpages) >> return set_memory_rw(addr, numpages); >> } >> >> -static int __set_pages_p(struct page *page, int numpages) >> +static int __set_pages_p(const void *addr, int numpages) >> { >> - unsigned long tempaddr = (unsigned long) page_address(page); >> + unsigned long tempaddr = (unsigned long)addr; >> struct cpa_data cpa = { .vaddr = &tempaddr, >> .pgd = NULL, >> .numpages = numpages, >> @@ -2606,9 +2606,9 @@ static int __set_pages_p(struct page *page, int numpages) >> return __change_page_attr_set_clr(&cpa, 1); >> } >> >> -static int __set_pages_np(struct page *page, int numpages) >> +static int __set_pages_np(const void *addr, int numpages) >> { >> - unsigned long tempaddr = (unsigned long) page_address(page); >> + unsigned long tempaddr = (unsigned long)addr; >> struct cpa_data cpa = { .vaddr = &tempaddr, >> .pgd = NULL, >> .numpages = numpages, >> @@ -2625,22 +2625,23 @@ static int __set_pages_np(struct page *page, int numpages) >> return __change_page_attr_set_clr(&cpa, 1); >> } >> > > I agree that in arch/x86/mm/pat/set_memory.c, __kernel_map_pages(), has > calls to __set_pages_p() and __set_pages_np() that seems to have been > missed out in this patch. Those calls still pass struct page *. Maybe > that's because __kernel_map_pages() was guarded by > CONFIG_DEBUG_PAGEALLOC, so if you were using an lsp-guided refactoring > that call was missed. Fixed, thanks! > > Should probably try a grep to see what else needs replacing :) > > [1] https://sashiko.dev/#/patchset/20260317141031.514-1-kalyazin%40amazon.com > >> -int set_direct_map_invalid_noflush(struct page *page) >> +int set_direct_map_invalid_noflush(const void *addr) >> { >> - return __set_pages_np(page, 1); >> + return __set_pages_np(addr, 1); >> } >> >> -int set_direct_map_default_noflush(struct page *page) >> +int set_direct_map_default_noflush(const void *addr) >> { >> - return __set_pages_p(page, 1); >> + return __set_pages_p(addr, 1); >> } >> >> -int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) >> +int set_direct_map_valid_noflush(const void *addr, unsigned long numpages, >> + bool valid) >> { >> if (valid) >> - return __set_pages_p(page, nr); >> + return __set_pages_p(addr, numpages); >> >> - return __set_pages_np(page, nr); >> + return __set_pages_np(addr, numpages); >> } >> >> #ifdef CONFIG_DEBUG_PAGEALLOC >> >> [...snip...] >>