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Peter Anvin" , Andy Lutomirski , Steven Rostedt , Masami Hiramatsu , Mark Rutland , Juergen Gross , "Srivatsa S. Bhat (VMware)" , Alexey Makhalov , VMware PV-Drivers Reviewers , Peter Zijlstra , Darren Hart , Andy Shevchenko , Boris Ostrovsky , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-pci@vger.kernel.org, platform-driver-x86@vger.kernel.org, xen-devel@lists.xenproject.org, linux-pm@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 04/20] x86: avoid unneeded __div64_32 function definition Date: Tue, 16 May 2023 21:35:33 +0200 Message-Id: <20230516193549.544673-5-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230516193549.544673-1-arnd@kernel.org> References: <20230516193549.544673-1-arnd@kernel.org> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 896F240002 X-Stat-Signature: fib6wn8pcqh4pmca1r6icyc8zoxzzus6 X-HE-Tag: 1684265793-86803 X-HE-Meta: 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 USWXpOFm pZjZ+AhEiA9g1NHBZ7IFyjueoat2BjDd7EEnBQOt0qRDMBC083HdRKu/53vQqUi+2RS+LThal1eRbAYd2arq5UGjans8d0gVTxys8ADwM6avkj7WqcLWYA44ure1sEhGyoUyWEDh0MaVPgjCKpjhKYVQCyIzDk+r85k1WwOs7T4LznvRiA/kPiXYRaNaXnVjO60PK0vpopQlYilkgKf2juODQpk+L+WQWUZ+K7Ex8YYJZfiiTHpL83HKDoVpLbnKCr3cbiapK4bgE8mKqHIyrCNnd+vQ8Z6ii4hexiXkU0KQr7MUSkVYAWenezUnOLvNMpH71AQPWSxxXOZU= 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: From: Arnd Bergmann The __div64_32() function is provided for 32-bit architectures that don't have a custom do_div() implementation. x86_32 has one, and does not use the header file that declares the function prototype, so the definition causes a W=1 warning: lib/math/div64.c:31:32: error: no previous prototype for '__div64_32' [-Werror=missing-prototypes] Define an empty macro to prevent the function definition from getting built, which avoids the warning and saves a little .text space. Signed-off-by: Arnd Bergmann --- arch/x86/include/asm/div64.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/include/asm/div64.h b/arch/x86/include/asm/div64.h index b8f1dc0761e4..9826d5fc12e3 100644 --- a/arch/x86/include/asm/div64.h +++ b/arch/x86/include/asm/div64.h @@ -71,6 +71,8 @@ static inline u64 mul_u32_u32(u32 a, u32 b) } #define mul_u32_u32 mul_u32_u32 +#define __div64_32 /* not needed */ + #else # include