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[73.254.87.52]) by smtp.gmail.com with ESMTPSA id j2-20020a170902758200b001bf52834696sm8281924pll.207.2023.11.21.13.20.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Nov 2023 13:20:36 -0800 (PST) From: mhkelley58@gmail.com X-Google-Original-From: mhklinux@outlook.com To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, kirill.shutemov@linux.intel.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, luto@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com, thomas.lendacky@amd.com, ardb@kernel.org, jroedel@suse.de, seanjc@google.com, rick.p.edgecombe@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 3/8] x86/mm: Remove "static" from vmap_pages_range() Date: Tue, 21 Nov 2023 13:20:11 -0800 Message-Id: <20231121212016.1154303-4-mhklinux@outlook.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231121212016.1154303-1-mhklinux@outlook.com> References: <20231121212016.1154303-1-mhklinux@outlook.com> Reply-To: mhklinux@outlook.com MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Michael Kelley The mm subsystem currently provides no mechanism to map memory pages to a specified virtual address range. A virtual address range can be allocated using get_vm_area(), but the only function available for mapping memory pages to a caller-specified address in that range is ioremap_page_range(), which is inappropriate for system memory. Fix this by allowing vmap_pages_range() to be used by callers outside of vmalloc.c. Signed-off-by: Michael Kelley --- include/linux/vmalloc.h | 2 ++ mm/vmalloc.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index c720be70c8dd..ee12f5226a45 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -233,6 +233,8 @@ static inline bool is_vm_area_hugepages(const void *add= r) =20 #ifdef CONFIG_MMU void vunmap_range(unsigned long addr, unsigned long end); +int vmap_pages_range(unsigned long addr, unsigned long end, pgprot_t prot, + struct page **pages, unsigned int page_shift); static inline void set_vm_flush_reset_perms(void *addr) { struct vm_struct *vm =3D find_vm_area(addr); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index d12a17fc0c17..b2a72bd317c6 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -625,7 +625,7 @@ int vmap_pages_range_noflush(unsigned long addr, unsign= ed long end, * RETURNS: * 0 on success, -errno on failure. */ -static int vmap_pages_range(unsigned long addr, unsigned long end, +int vmap_pages_range(unsigned long addr, unsigned long end, pgprot_t prot, struct page **pages, unsigned int page_shift) { int err; --=20 2.25.1