From: Geert Uytterhoeven <geert@linux-m68k.org>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: linux-xtensa@linux-xtensa.org, Arnd Bergmann <arnd@arndb.de>,
linux-sh@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-mips@vger.kernel.org, amd-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>,
linux-f2fs-devel@lists.sourceforge.net,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: Re: [f2fs-dev] Calculating array sizes in C - was: Re: Build regressions/improvements in v6.2-rc1
Date: Tue, 17 Jan 2023 21:05:58 +0100 [thread overview]
Message-ID: <CAMuHMdWpHSsAB3WosyCVgS6+t4pU35Xfj3tjmdCDoyS2QkS7iw@mail.gmail.com> (raw)
In-Reply-To: <429140e0-72fe-c91c-53bc-124d33ab5ffa@physik.fu-berlin.de>
Hi Adrian,
On Tue, Jan 17, 2023 at 6:06 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 1/17/23 18:01, Geert Uytterhoeven wrote:
> > The issue is that some of the parameters are not arrays, but
> > NULL. E.g.:
> >
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c:static
> > DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c- NULL,
> > prio_registers, NULL);
>
> Isn't this supposed to be caught by this check:
>
> a, __same_type(a, NULL)
>
> ?
Yeah, but gcc thinks it is smarter than us...
Probably it drops the test, assuming UB cannot happen.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: linux-xtensa@linux-xtensa.org, Arnd Bergmann <arnd@arndb.de>,
linux-sh@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-mips@vger.kernel.org, amd-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>,
linux-f2fs-devel@lists.sourceforge.net,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: Re: Calculating array sizes in C - was: Re: Build regressions/improvements in v6.2-rc1
Date: Tue, 17 Jan 2023 21:05:58 +0100 [thread overview]
Message-ID: <CAMuHMdWpHSsAB3WosyCVgS6+t4pU35Xfj3tjmdCDoyS2QkS7iw@mail.gmail.com> (raw)
In-Reply-To: <429140e0-72fe-c91c-53bc-124d33ab5ffa@physik.fu-berlin.de>
Hi Adrian,
On Tue, Jan 17, 2023 at 6:06 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 1/17/23 18:01, Geert Uytterhoeven wrote:
> > The issue is that some of the parameters are not arrays, but
> > NULL. E.g.:
> >
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c:static
> > DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c- NULL,
> > prio_registers, NULL);
>
> Isn't this supposed to be caught by this check:
>
> a, __same_type(a, NULL)
>
> ?
Yeah, but gcc thinks it is smarter than us...
Probably it drops the test, assuming UB cannot happen.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-mips@vger.kernel.org, linux-sh@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com,
linux-xtensa@linux-xtensa.org,
Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: Calculating array sizes in C - was: Re: Build regressions/improvements in v6.2-rc1
Date: Tue, 17 Jan 2023 21:05:58 +0100 [thread overview]
Message-ID: <CAMuHMdWpHSsAB3WosyCVgS6+t4pU35Xfj3tjmdCDoyS2QkS7iw@mail.gmail.com> (raw)
In-Reply-To: <429140e0-72fe-c91c-53bc-124d33ab5ffa@physik.fu-berlin.de>
Hi Adrian,
On Tue, Jan 17, 2023 at 6:06 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 1/17/23 18:01, Geert Uytterhoeven wrote:
> > The issue is that some of the parameters are not arrays, but
> > NULL. E.g.:
> >
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c:static
> > DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c- NULL,
> > prio_registers, NULL);
>
> Isn't this supposed to be caught by this check:
>
> a, __same_type(a, NULL)
>
> ?
Yeah, but gcc thinks it is smarter than us...
Probably it drops the test, assuming UB cannot happen.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-mips@vger.kernel.org, linux-sh@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com,
linux-xtensa@linux-xtensa.org,
Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: Calculating array sizes in C - was: Re: Build regressions/improvements in v6.2-rc1
Date: Tue, 17 Jan 2023 21:05:58 +0100 [thread overview]
Message-ID: <CAMuHMdWpHSsAB3WosyCVgS6+t4pU35Xfj3tjmdCDoyS2QkS7iw@mail.gmail.com> (raw)
In-Reply-To: <429140e0-72fe-c91c-53bc-124d33ab5ffa@physik.fu-berlin.de>
Hi Adrian,
On Tue, Jan 17, 2023 at 6:06 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 1/17/23 18:01, Geert Uytterhoeven wrote:
> > The issue is that some of the parameters are not arrays, but
> > NULL. E.g.:
> >
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c:static
> > DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
> > arch/sh/kernel/cpu/sh2/setup-sh7619.c- NULL,
> > prio_registers, NULL);
>
> Isn't this supposed to be caught by this check:
>
> a, __same_type(a, NULL)
>
> ?
Yeah, but gcc thinks it is smarter than us...
Probably it drops the test, assuming UB cannot happen.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
next prev parent reply other threads:[~2023-01-17 20:06 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-25 22:07 Linux 6.2-rc1 Linus Torvalds
2022-12-26 19:52 ` Guenter Roeck
2022-12-26 20:56 ` Linus Torvalds
2022-12-26 21:03 ` Kees Cook
2022-12-26 22:10 ` Guenter Roeck
2022-12-27 0:29 ` Guenter Roeck
2022-12-27 1:32 ` Kees Cook
2022-12-27 5:52 ` Guenter Roeck
2022-12-28 3:40 ` Kees Cook
2022-12-28 14:44 ` Guenter Roeck
2023-01-07 0:06 ` Jaegeuk Kim
2022-12-26 22:41 ` Vlastimil Babka
2022-12-26 21:10 ` Max Filippov
2022-12-26 22:08 ` Guenter Roeck
2022-12-27 8:29 ` Build regressions/improvements in v6.2-rc1 Geert Uytterhoeven
2022-12-27 8:35 ` Geert Uytterhoeven
2022-12-27 8:35 ` Geert Uytterhoeven
2022-12-27 8:35 ` Geert Uytterhoeven
2023-01-01 1:33 ` Rob Landley
2023-01-01 12:24 ` Geert Uytterhoeven
2023-01-04 6:32 ` Michael Ellerman
2023-01-06 15:10 ` John Paul Adrian Glaubitz
2023-01-06 15:10 ` John Paul Adrian Glaubitz
2023-01-06 15:10 ` John Paul Adrian Glaubitz
2023-01-06 15:10 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-06 15:17 ` Geert Uytterhoeven
2023-01-06 15:17 ` Geert Uytterhoeven
2023-01-06 15:17 ` Geert Uytterhoeven
2023-01-06 15:17 ` [f2fs-dev] " Geert Uytterhoeven
2023-01-06 15:18 ` Geert Uytterhoeven
2023-01-06 15:18 ` Geert Uytterhoeven
2023-01-06 15:18 ` Geert Uytterhoeven
2023-01-06 15:18 ` Geert Uytterhoeven
2023-01-17 16:42 ` Calculating array sizes in C - was: " John Paul Adrian Glaubitz
2023-01-17 16:42 ` John Paul Adrian Glaubitz
2023-01-17 16:42 ` John Paul Adrian Glaubitz
2023-01-17 16:42 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-17 17:01 ` Geert Uytterhoeven
2023-01-17 17:01 ` Geert Uytterhoeven
2023-01-17 17:01 ` Geert Uytterhoeven
2023-01-17 17:01 ` [f2fs-dev] " Geert Uytterhoeven
2023-01-17 17:06 ` John Paul Adrian Glaubitz
2023-01-17 17:06 ` John Paul Adrian Glaubitz
2023-01-17 17:06 ` John Paul Adrian Glaubitz
2023-01-17 17:06 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-17 20:05 ` Geert Uytterhoeven [this message]
2023-01-17 20:05 ` Geert Uytterhoeven
2023-01-17 20:05 ` Geert Uytterhoeven
2023-01-17 20:05 ` Geert Uytterhoeven
2023-01-17 20:37 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-17 20:37 ` John Paul Adrian Glaubitz
2023-01-17 20:37 ` John Paul Adrian Glaubitz
2023-01-17 20:37 ` John Paul Adrian Glaubitz
2023-01-19 22:11 ` [f2fs-dev] " Michael.Karcher
2023-01-19 22:11 ` Michael.Karcher
2023-01-19 22:11 ` Michael.Karcher
2023-01-19 22:11 ` Michael.Karcher
2023-01-20 3:31 ` Rob Landley
2023-01-20 3:31 ` [f2fs-dev] " Rob Landley
2023-01-20 3:31 ` Rob Landley
2023-01-20 3:31 ` Rob Landley
2023-01-20 10:53 ` Segher Boessenkool
2023-01-20 10:53 ` Segher Boessenkool
2023-01-20 10:53 ` Segher Boessenkool
2023-01-20 10:53 ` [f2fs-dev] " Segher Boessenkool
2023-01-20 11:42 ` David Laight
2023-01-20 11:42 ` David Laight
2023-01-20 11:42 ` David Laight
2023-01-20 18:29 ` Michael.Karcher
2023-01-20 18:29 ` Michael.Karcher
2023-01-20 18:29 ` Michael.Karcher
2023-01-20 18:29 ` [f2fs-dev] " Michael.Karcher
2023-01-20 8:49 ` John Paul Adrian Glaubitz
2023-01-20 8:49 ` John Paul Adrian Glaubitz
2023-01-20 8:49 ` John Paul Adrian Glaubitz
2023-01-20 8:49 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-20 19:29 ` Michael Karcher
2023-01-20 19:29 ` Michael Karcher
2023-01-20 19:29 ` Michael Karcher
2023-01-21 21:26 ` John Paul Adrian Glaubitz
2023-01-21 21:26 ` John Paul Adrian Glaubitz
2023-01-21 21:26 ` John Paul Adrian Glaubitz
2023-01-21 21:26 ` [f2fs-dev] " John Paul Adrian Glaubitz
2023-01-06 15:39 ` Alex Deucher
2023-01-06 15:39 ` Alex Deucher
2023-01-06 15:39 ` Alex Deucher
2023-01-06 15:39 ` [f2fs-dev] " Alex Deucher
2023-01-04 19:01 ` Linux 6.2-rc1 Pali Rohár
2023-01-04 19:25 ` Linus Torvalds
2023-01-04 20:56 ` Pali Rohár
2023-01-04 21:27 ` Pali Rohár
2023-01-04 21:32 ` Linus Torvalds
2023-01-04 21:43 ` Jens Axboe
2023-01-05 11:25 ` Greg Kroah-Hartman
2023-01-05 15:26 ` Jens Axboe
2023-01-05 17:42 ` Pali Rohár
2023-01-05 17:45 ` Jens Axboe
2023-01-05 19:06 ` Linus Torvalds
2023-01-05 19:22 ` Pali Rohár
2023-01-05 19:40 ` Jens Axboe
2023-01-05 20:03 ` Linus Torvalds
2023-01-05 20:33 ` Jens Axboe
2023-01-06 16:58 ` Pali Rohár
2023-01-06 17:04 ` Jens Axboe
2023-01-28 19:34 ` pktcdvd Pali Rohár
2023-01-28 19:43 ` pktcdvd Linus Torvalds
2023-01-29 21:53 ` pktcdvd Jens Axboe
2023-01-29 21:55 ` pktcdvd Jens Axboe
2023-01-29 22:21 ` pktcdvd Pali Rohár
2023-01-29 22:34 ` pktcdvd Jens Axboe
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