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s=korg; t=1683935430; bh=hzop67DZgJlzybdRGNxWTsRFrxurG5n+8LvYrld9il0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=vvA0DDvRtyGiLNjGx1uCyKUbKt0d5DR/833iZeGeW+T4knyrOg3Yh9zON/OdPvLWH 7NS4miXpHZ+w4nk0aoHxX9BNe8lY5nfrq/aiZThDR/zciA8sRPMUuYea43A5eMmjMa Y2FGA2Lb3vT8u2eK3XXWeRECHWzz2AuoTSOvw++M= Date: Fri, 12 May 2023 16:50:29 -0700 From: Andrew Morton To: Arnd Bergmann Cc: Andrey Ryabinin , Arnd Bergmann , Catalin Marinas , Will Deacon , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Mark Rutland , Mark Brown , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org Subject: Re: [PATCH 2/2] [v3] kasan: use internal prototypes matching gcc-13 builtins Message-Id: <20230512165029.9ce044570a2906e7185fe38c@linux-foundation.org> In-Reply-To: <20230509145735.9263-2-arnd@kernel.org> References: <20230509145735.9263-1-arnd@kernel.org> <20230509145735.9263-2-arnd@kernel.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: akhy496dmtfokdett5rdq1pst8qz8coe X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 693FD1C000D X-Rspam-User: X-HE-Tag: 1683935432-428063 X-HE-Meta: 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 4bpijHPm UQal1XBXlxIGXKsgWisRzRZXDf3/wmEuymJYz+Zpl72MuI09RSXS3pgspL1+h+ZNs7fIvinHFoDSO5rLmKTaULTQlf1HECGj6DX751R7pPg0HxPFjS2U7tabhgQm2DeKHyPG5QB+PxOcyzuRFkl/W1RzfK83j9KiO5poQyAgrcQ9tewCb5x1L8PA+tXz9sM5seLFKJxz5ZPp95cTD5Y2vWCmwCGgmLizZ/dKnGobZSsKVtxKK3KWIcFz2JGdUebelq1EFv4ixhxcjnn8IwO0H5JlVm+5FuA7l2pPuES1bJPy6+DZ/Z0ywZ88lVKHfGtH9jnAKtM3sZ1HxYQmDvabPkVzwb5ifOq4auqSltVRIfVVKz5JV8hU6wqhHYNv+X/fPJ8peAiJiT6BQRu81hMvRzDZrfXtTXiW/4AENijU6b2dsc937LYrNLJ2ESEz1lz+mCKnbiZHlfGfOIQE= 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: On Tue, 9 May 2023 16:57:21 +0200 Arnd Bergmann wrote: > gcc-13 warns about function definitions for builtin interfaces > that have a different prototype, e.g.: > > In file included from kasan_test.c:31: > kasan.h:574:6: error: conflicting types for built-in function '__asan_register_globals'; expected 'void(void *, long int)' [-Werror=builtin-declaration-mismatch] > 574 | void __asan_register_globals(struct kasan_global *globals, size_t size); > kasan.h:577:6: error: conflicting types for built-in function '__asan_alloca_poison'; expected 'void(void *, long int)' [-Werror=builtin-declaration-mismatch] > 577 | void __asan_alloca_poison(unsigned long addr, size_t size); > kasan.h:580:6: error: conflicting types for built-in function '__asan_load1'; expected 'void(void *)' [-Werror=builtin-declaration-mismatch] > 580 | void __asan_load1(unsigned long addr); > kasan.h:581:6: error: conflicting types for built-in function '__asan_store1'; expected 'void(void *)' [-Werror=builtin-declaration-mismatch] > 581 | void __asan_store1(unsigned long addr); > kasan.h:643:6: error: conflicting types for built-in function '__hwasan_tag_memory'; expected 'void(void *, unsigned char, long int)' [-Werror=builtin-declaration-mismatch] > 643 | void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size); I added cc:stable to these, but staged them for the next merge window. Because I expect many people will compile earlier kernels many times with gcc-13 and later, and they won't want to have to see these warnings all the time.