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Date: Wed, 15 Sep 2021 09:07:47 +0200 From: Geert Uytterhoeven <geert@...ux-m68k.org> To: Guenter Roeck <linux@...ck-us.net> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Richard Henderson <rth@...ddle.net>, Ivan Kokshaysky <ink@...assic.park.msu.ru>, Matt Turner <mattst88@...il.com>, "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, alpha <linux-alpha@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Parisc List <linux-parisc@...r.kernel.org>, netdev <netdev@...r.kernel.org>, linux-sparse@...r.kernel.org Subject: Re: [PATCH v2 1/4] compiler.h: Introduce absolute_pointer macro On Wed, Sep 15, 2021 at 5:52 AM Guenter Roeck <linux@...ck-us.net> wrote: > absolute_pointer() disassociates a pointer from its originating symbol > type and context. Use it to prevent compiler warnings/errors such as > > drivers/net/ethernet/i825xx/82596.c: In function 'i82596_probe': > ./arch/m68k/include/asm/string.h:72:25: error: > '__builtin_memcpy' reading 6 bytes from a region of size 0 > [-Werror=stringop-overread] > > Such warnings may be reported by gcc 11.x for string and memory operations > on fixed addresses. > > Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org> > Signed-off-by: Guenter Roeck <linux@...ck-us.net> Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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