2015-09-17 22:37 GMT+03:00 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>: > On Thu, 17 Sep 2015 09:17:56 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> wrote: > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >> head: 72714841b705a5b9bccf37ee85a62352bee3a3ef >> commit: 393f203f5fd54421fddb1e2a263f64d3876eeadb x86_64: kasan: add interceptors for memset/memmove/memcpy functions >> date: 7 months ago >> config: i386-randconfig-i0-201537 (attached as .config) >> reproduce: >> git checkout 393f203f5fd54421fddb1e2a263f64d3876eeadb >> # save the attached .config to linux build tree >> make ARCH=i386 >> >> All warnings (new ones prefixed by >>): >> >> drivers/firmware/efi/libstub/efi-stub-helper.c: In function 'efi_relocate_kernel': >> >> drivers/firmware/efi/libstub/efi-stub-helper.c:599:2: warning: implicit declaration of function 'memcpy' [-Wimplicit-function-declaration] >> memcpy((void *)new_addr, (void *)cur_image_addr, image_size); > > I can't reproduce this. > > But whatever. I'll do this: > > --- a/drivers/firmware/efi/libstub/efi-stub-helper.c~drivers-firmware-efi-libstub-efi-stub-helperc-needs-stringh > +++ a/drivers/firmware/efi/libstub/efi-stub-helper.c > @@ -11,6 +11,7 @@ > */ > > #include <linux/efi.h> > +#include <linux/string.h> This won't help. arch/x86/include/asm/string_32.h has several variants of #define memcpy() But it doesn't have declaration of memcpy function like: void memcpy(const void *to, const void *from, size_t len); Thus '#undef memcpy' causes this warning, and including <linux/string.h> won't help (It probably already included) Patch from KASAN for arm64 series: http://marc.info/?l=linux-mm&m=144248270719929&w=2 ([PATCH v6 3/6] x86, efi, kasan: #undef memset/memcpy/memmove per arch.) should fix this warning, as it moves '#undef memcpy' under #ifdef X86_64 in arch/x86/include/asm/efi.h > #include <asm/efi.h> > > #include "efistub.h" > _ > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>