From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> To: Nick Desaulniers <ndesaulniers@google.com> Cc: Kees Cook <keescook@chromium.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, "Ted Ts'o" <tytso@mit.edu>, Greg KH <gregkh@linuxfoundation.org>, linux-kernel <linux-kernel@vger.kernel.org>, Dan <dan.carpenter@oracle.com>, Andreas Dilger <adilger.kernel@dilger.ca>, Masahiro Yamada <yamada.masahiro@socionext.com>, Michal Marek <michal.lkml@markovi.net>, Steven Rostedt <rostedt@goodmis.org>, Mauro Carvalho Chehab <mchehab+samsung@kernel.org>, Olof Johansson <olof@lxom.net>, Konstantin Ryabitsev <konstantin@linuxfoundation.org>, David Miller <davem@davemloft.net>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>, Paul Lawrence <paullawrence@google.com>, Sandipan Das <sandipan@linux.vnet.ibm.com>, Andrey Konovalov <andreyknvl@google.com>, David Woodhouse <dwmw2@infradead.org>, Will Deacon <will.deacon@arm.com>, Philippe Ombredanne <pombredanne@nexb.com>, Paul Burton <paul.burton@mips.com>, David Rientjes <rientjes@google.com>, Willy Tarreau <w@1wt.eu>, Martin Sebor <msebor@gmail.com>, Christopher Li <sparse@chrisli.org>, Jonathan Corbet <corbet@lwn.net>, Geert Uytterhoeven <geert@linux-m68k.org>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Joe Perches <joe@perches.com>, Arnd Bergmann <arnd@arndb.de>, Dominique Martinet <asmadeus@codewreck.org>, Stefan Agner <stefan@agner.ch>, Luc Van Oostenryck <luc.vanoostenryck@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, Linux Doc Mailing List <linux-doc@vger.kernel.org>, Ext4 Developers List <linux-ext4@vger.kernel.org>, linux-sparse@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: Re: [PATCH 1/2] Compiler Attributes: add support for __fallthrough (gcc >= 7.1) Date: Mon, 22 Oct 2018 22:59:16 +0200 [thread overview] Message-ID: <CANiq72kUJOSrR=h2=2jXfkBPLrR=DrN8X4OoKOqAte4sMLxkdQ@mail.gmail.com> (raw) In-Reply-To: <CAKwvOdn1TOzZYg_i0zB0rU+K3jaQQ8XmWnLXz01NCG9V+8PxHw@mail.gmail.com> On Mon, Oct 22, 2018 at 7:17 PM Nick Desaulniers <ndesaulniers@google.com> wrote: > > On Mon, Oct 22, 2018 at 2:43 AM Miguel Ojeda > <miguel.ojeda.sandonis@gmail.com> wrote: > > > > On Mon, Oct 22, 2018 at 11:41 AM Miguel Ojeda > > <miguel.ojeda.sandonis@gmail.com> wrote: > > > > > > * clang does *not* support the attribute in C. > > > > ...nor the warning at all, by the way (which is why this is OK). > > > > Cheers, > > Miguel > > Oh? We're going through and annotating all of Android's C++ source > right now with it. > https://clang.llvm.org/docs/DiagnosticsReference.html#wimplicit-fallthrough > Sure, but I am talking about the C mode only. Please read the previous messages in the thread :-) > Though it looks like the attribute syntax I like from GCC is not yet > supported in Clang. Indeed, that is what I explained in the last message. > https://bugs.llvm.org/show_bug.cgi?id=37135 > https://github.com/ClangBuiltLinux/linux/issues/235 > I'll take a look at adding support. > > So Kees sent me this embarrassing example: > https://godbolt.org/z/gV_c9_ > (try changing the language from C++ to C; it works)! That's embarrassing! Yup, that is what I have been testing yesterday -- see the linked thread in the commit message for the summary of the results. > https://bugs.llvm.org/show_bug.cgi?id=39382 > https://github.com/ClangBuiltLinux/linux/issues/236 > Will get these both fixed up. Cheers, Miguel
WARNING: multiple messages have this Message-ID (diff)
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> To: Nick Desaulniers <ndesaulniers@google.com> Cc: Kees Cook <keescook@chromium.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Ted Ts'o <tytso@mit.edu>, Greg KH <gregkh@linuxfoundation.org>, linux-kernel <linux-kernel@vger.kernel.org>, Dan <dan.carpenter@oracle.com>, Andreas Dilger <adilger.kernel@dilger.ca>, Masahiro Yamada <yamada.masahiro@socionext.com>, Michal Marek <michal.lkml@markovi.net>, Steven Rostedt <rostedt@goodmis.org>, Mauro Carvalho Chehab <mchehab+samsung@kernel.org>, Olof Johansson <olof@lxom.net>, Konstantin Ryabitsev <konstantin@linuxfoundation.org>, David Miller <davem@davemloft.net>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>, Paul Lawrence <paullawrence@google.com>, Sandipan Das <sandipan@linux.vnet.i> Subject: Re: [PATCH 1/2] Compiler Attributes: add support for __fallthrough (gcc >= 7.1) Date: Mon, 22 Oct 2018 22:59:16 +0200 [thread overview] Message-ID: <CANiq72kUJOSrR=h2=2jXfkBPLrR=DrN8X4OoKOqAte4sMLxkdQ@mail.gmail.com> (raw) In-Reply-To: <CAKwvOdn1TOzZYg_i0zB0rU+K3jaQQ8XmWnLXz01NCG9V+8PxHw@mail.gmail.com> On Mon, Oct 22, 2018 at 7:17 PM Nick Desaulniers <ndesaulniers@google.com> wrote: > > On Mon, Oct 22, 2018 at 2:43 AM Miguel Ojeda > <miguel.ojeda.sandonis@gmail.com> wrote: > > > > On Mon, Oct 22, 2018 at 11:41 AM Miguel Ojeda > > <miguel.ojeda.sandonis@gmail.com> wrote: > > > > > > * clang does *not* support the attribute in C. > > > > ...nor the warning at all, by the way (which is why this is OK). > > > > Cheers, > > Miguel > > Oh? We're going through and annotating all of Android's C++ source > right now with it. > https://clang.llvm.org/docs/DiagnosticsReference.html#wimplicit-fallthrough > Sure, but I am talking about the C mode only. Please read the previous messages in the thread :-) > Though it looks like the attribute syntax I like from GCC is not yet > supported in Clang. Indeed, that is what I explained in the last message. > https://bugs.llvm.org/show_bug.cgi?id=37135 > https://github.com/ClangBuiltLinux/linux/issues/235 > I'll take a look at adding support. > > So Kees sent me this embarrassing example: > https://godbolt.org/z/gV_c9_ > (try changing the language from C++ to C; it works)! That's embarrassing! Yup, that is what I have been testing yesterday -- see the linked thread in the commit message for the summary of the results. > https://bugs.llvm.org/show_bug.cgi?id=39382 > https://github.com/ClangBuiltLinux/linux/issues/236 > Will get these both fixed up. Cheers, Miguel
next prev parent reply other threads:[~2018-10-22 20:59 UTC|newest] Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-21 17:14 [PATCH 0/2] Compiler Attributes: __fallthrough Miguel Ojeda 2018-10-21 17:14 ` Miguel Ojeda 2018-10-21 17:14 ` [PATCH 1/2] Compiler Attributes: add support for __fallthrough (gcc >= 7.1) Miguel Ojeda 2018-10-21 17:14 ` Miguel Ojeda 2018-10-21 17:14 ` Miguel Ojeda 2018-10-21 22:27 ` Theodore Y. Ts'o 2018-10-21 22:27 ` Theodore Y. Ts'o 2018-10-22 9:26 ` Miguel Ojeda 2018-10-22 9:34 ` Kees Cook 2018-10-22 9:34 ` Kees Cook 2018-10-22 9:41 ` Miguel Ojeda 2018-10-22 9:41 ` Miguel Ojeda 2018-10-22 9:43 ` Miguel Ojeda 2018-10-22 9:43 ` Miguel Ojeda 2018-10-22 17:17 ` Nick Desaulniers 2018-10-22 17:17 ` Nick Desaulniers 2018-10-22 20:59 ` Miguel Ojeda [this message] 2018-10-22 20:59 ` Miguel Ojeda 2018-10-22 10:53 ` Kees Cook 2018-10-22 10:53 ` Kees Cook 2018-10-22 11:24 ` Miguel Ojeda 2018-10-22 11:24 ` Miguel Ojeda 2018-10-22 13:39 ` Miguel Ojeda 2018-10-22 13:39 ` Miguel Ojeda 2018-10-22 17:23 ` Nick Desaulniers 2018-10-22 17:23 ` Nick Desaulniers 2018-10-22 9:41 ` Bernd Petrovitsch 2018-10-22 10:27 ` Dan Carpenter 2018-10-22 10:27 ` Dan Carpenter 2018-10-22 10:45 ` Bernd Petrovitsch 2018-10-22 10:45 ` Bernd Petrovitsch 2018-10-22 10:53 ` Dan Carpenter 2018-10-22 10:53 ` Dan Carpenter 2018-10-22 11:07 ` Miguel Ojeda 2018-10-22 11:07 ` Miguel Ojeda 2018-10-22 17:49 ` Bernd Petrovitsch 2018-10-22 17:49 ` Bernd Petrovitsch 2018-10-22 17:49 ` Bernd Petrovitsch 2018-10-22 17:54 ` Nick Desaulniers 2018-10-22 17:54 ` Nick Desaulniers 2018-10-22 18:13 ` Bernd Petrovitsch 2018-10-22 18:13 ` Bernd Petrovitsch 2018-10-22 19:56 ` Nick Desaulniers 2018-10-22 21:34 ` Miguel Ojeda 2018-10-22 21:34 ` Miguel Ojeda 2018-10-22 17:26 ` Nick Desaulniers 2018-10-22 17:26 ` Nick Desaulniers 2018-10-22 0:42 ` Matthew Wilcox 2018-10-22 0:42 ` Matthew Wilcox 2018-10-22 6:58 ` Theodore Y. Ts'o 2018-10-22 6:58 ` Theodore Y. Ts'o 2018-10-22 7:05 ` Willy Tarreau 2018-10-22 9:32 ` Miguel Ojeda 2018-10-22 9:32 ` Miguel Ojeda 2018-10-22 12:07 ` Luc Van Oostenryck 2018-10-22 12:07 ` Luc Van Oostenryck 2018-10-22 12:09 ` Miguel Ojeda 2018-10-22 12:09 ` Miguel Ojeda 2018-10-22 17:36 ` Nick Desaulniers 2018-10-22 17:36 ` Nick Desaulniers 2018-10-22 21:17 ` Miguel Ojeda 2018-10-22 21:17 ` Miguel Ojeda 2018-10-21 17:14 ` [PATCH 2/2] Compiler Attributes: auxdisplay: panel: use __fallthrough Miguel Ojeda 2018-10-21 17:14 ` Miguel Ojeda 2018-10-21 18:11 ` Joe Perches 2018-10-21 18:11 ` Joe Perches 2018-10-22 9:51 ` Miguel Ojeda 2018-10-22 9:51 ` Miguel Ojeda 2018-10-22 15:48 ` Joe Perches 2018-10-22 15:48 ` Joe Perches 2018-10-22 14:10 ` Kees Cook 2018-10-22 14:10 ` Kees Cook [not found] ` <20181023053542.lsklua2p3lnbkqir@mwanda> 2018-11-02 10:49 ` Miguel Ojeda 2018-11-02 10:49 ` Miguel Ojeda 2018-11-02 10:56 ` Miguel Ojeda 2018-11-02 10:56 ` Miguel Ojeda 2018-10-21 18:29 ` [PATCH 0/2] Compiler Attributes: __fallthrough Greg Kroah-Hartman 2018-10-21 18:29 ` Greg Kroah-Hartman 2018-10-21 18:52 ` Joe Perches 2018-10-21 18:52 ` Joe Perches 2018-10-22 5:27 ` Dan Carpenter 2018-10-22 5:27 ` Dan Carpenter 2018-10-22 9:48 ` Miguel Ojeda 2018-10-22 9:48 ` Miguel Ojeda 2018-10-22 16:54 ` Nick Desaulniers 2018-10-22 16:54 ` Nick Desaulniers 2018-10-22 21:23 ` Miguel Ojeda 2018-10-22 21:23 ` Miguel Ojeda 2018-10-23 5:43 ` Dan Carpenter 2018-10-23 5:43 ` Dan Carpenter
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