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Shutemov" , Shuah Khan , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Andrey Konovalov Subject: [PATCH v7 1/8] arm64: add type casts to untagged_addr macro Date: Tue, 2 Oct 2018 15:12:36 +0200 Message-Id: <6a951a9d1cd38eac1e49591f70e3cb9410349823.1538485901.git.andreyknvl@google.com> X-Mailer: git-send-email 2.19.0.605.g01d371f741-goog In-Reply-To: References: MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP This patch makes the untagged_addr macro accept all kinds of address types (void *, unsigned long, etc.) and allows not to specify type casts in each place where it is used. This is done by using __typeof__. Signed-off-by: Andrey Konovalov --- arch/arm64/include/asm/uaccess.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h index e66b0fca99c2..2d6451cbaa86 100644 --- a/arch/arm64/include/asm/uaccess.h +++ b/arch/arm64/include/asm/uaccess.h @@ -102,7 +102,8 @@ static inline unsigned long __range_ok(const void __user *addr, unsigned long si * up with a tagged userland pointer. Clear the tag to get a sane pointer to * pass on to access_ok(), for instance. */ -#define untagged_addr(addr) sign_extend64(addr, 55) +#define untagged_addr(addr) \ + ((__typeof__(addr))sign_extend64((__u64)(addr), 55)) #define access_ok(type, addr, size) __range_ok(addr, size) #define user_addr_max get_fs