Message ID | 20230503-virt-to-pfn-v6-4-rc1-v3-9-a16c19c03583@linaro.org |
---|---|
State | New |
Headers | show
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Tue, 23 May 2023 07:05:53 -0700 (PDT) From: Linus Walleij <linus.walleij@linaro.org> Date: Tue, 23 May 2023 16:05:33 +0200 Subject: [PATCH v3 09/12] asm-generic/page.h: Make pfn accessors static inlines MIME-Version: 1.0 Message-Id: <20230503-virt-to-pfn-v6-4-rc1-v3-9-a16c19c03583@linaro.org> References: <20230503-virt-to-pfn-v6-4-rc1-v3-0-a16c19c03583@linaro.org> In-Reply-To: <20230503-virt-to-pfn-v6-4-rc1-v3-0-a16c19c03583@linaro.org> To: Andrew Morton <akpm@linux-foundation.org>, Geert Uytterhoeven <geert@linux-m68k.org>, Vineet Gupta <vgupta@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Russell King <linux@armlinux.org.uk>, Greg Ungerer <gerg@linux-m68k.org> Cc: linux-mm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-snps-arc@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-cifs@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, Linus Walleij <linus.walleij@linaro.org> X-Mailer: b4 0.12.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230523_150656_298605_58C5834F X-CRM114-Status: GOOD ( 10.80 ) X-Spam-Score: -0.2 (/) X-Spam-Report: Spam detection software, running on the system "desiato.infradead.org", has NOT identified this incoming email as spam. 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Content preview: Making virt_to_pfn() a static inline taking a strongly typed (const void *) makes the contract of a passing a pointer of that type to the function explicit and exposes any misuse of the macro virt_to_ [...] Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:132 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors <linux-snps-arc.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-snps-arc>, <mailto:linux-snps-arc-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-snps-arc/> List-Post: <mailto:linux-snps-arc@lists.infradead.org> List-Help: <mailto:linux-snps-arc-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-snps-arc>, <mailto:linux-snps-arc-request@lists.infradead.org?subject=subscribe> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" <linux-snps-arc-bounces@lists.infradead.org> Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org |
Series |
arch: Make virt_to_pfn into a static inline
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expand
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diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h index c0be2edeb484..9773582fd96e 100644 --- a/include/asm-generic/page.h +++ b/include/asm-generic/page.h @@ -74,8 +74,16 @@ extern unsigned long memory_end; #define __va(x) ((void *)((unsigned long) (x))) #define __pa(x) ((unsigned long) (x)) -#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) -#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) +static inline unsigned long virt_to_pfn(const void *kaddr) +{ + return __pa(kaddr) >> PAGE_SHIFT; +} +#define virt_to_pfn virt_to_pfn +static inline void *pfn_to_virt(unsigned long pfn) +{ + return __va(pfn) << PAGE_SHIFT; +} +#define pfn_to_virt pfn_to_virt #define virt_to_page(addr) pfn_to_page(virt_to_pfn(addr)) #define page_to_virt(page) pfn_to_virt(page_to_pfn(page))
Making virt_to_pfn() a static inline taking a strongly typed (const void *) makes the contract of a passing a pointer of that type to the function explicit and exposes any misuse of the macro virt_to_pfn() acting polymorphic and accepting many types such as (void *), (unitptr_t) or (unsigned long) as arguments without warnings. For symmetry we do the same change for pfn_to_virt. Immediately define virt_to_pfn and pfn_to_virt to the static inline after the static inline since this style of defining functions is used for the generic helpers. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- include/asm-generic/page.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)