On Tue, 9 May 2023 16:57:21 +0200 Arnd Bergmann <arnd@xxxxxxxxxx> 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.
