From: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Changbin Du <changbin.du@gmail.com>
Cc: Michal Marek <michal.lkml@markovi.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Steven Rostedt <rostedt@goodmis.org>, X86 ML <x86@kernel.org>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-sparse@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v3 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING
Date: Mon, 29 Oct 2018 22:05:44 +0900 [thread overview]
Message-ID: <CAK7LNAQP6SgtbYcxZ7ApGg006omEZErNcDAVtPR=2RibxN8Ruw@mail.gmail.com> (raw)
In-Reply-To: <20181028130945.23581-4-changbin.du@gmail.com>
On Sun, Oct 28, 2018 at 10:13 PM Changbin Du <changbin.du@gmail.com> wrote:
>
> With '-Og' optimization level, GCC would not optimize a count for a loop
> as a constant value. But BUILD_BUG_ON() only accept compile-time constant
> values. Let's use __fix_to_virt() to avoid the error.
>
> arch/arm/mm/mmu.o: In function `fix_to_virt':
> /home/changbin/work/linux/./include/asm-generic/fixmap.h:31: undefined reference to `__compiletime_assert_31'
> Makefile:1051: recipe for target 'vmlinux' failed
> make: *** [vmlinux] Error 1
>
> Signed-off-by: Changbin Du <changbin.du@gmail.com>
> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> ---
Applied to linux-kbuild
--
Best Regards
Masahiro Yamada
next prev parent reply other threads:[~2018-10-29 13:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-28 13:09 [PATCH v3 0/4] kernel hacking: GCC optimization for better debug experience (-Og) Changbin Du
2018-10-28 13:09 ` [PATCH v3 1/4] x86/mm: declare check_la57_support() as inline Changbin Du
2018-10-28 18:09 ` Steven Rostedt
2018-10-29 13:04 ` Masahiro Yamada
2018-11-02 11:27 ` Borislav Petkov
2018-11-09 16:27 ` Masahiro Yamada
2018-11-10 1:41 ` Changbin Du
2018-10-28 13:09 ` [PATCH v3 2/4] kernel hacking: new config NO_AUTO_INLINE to disable compiler auto-inline optimizations Changbin Du
2018-10-29 13:03 ` Masahiro Yamada
2018-10-28 13:09 ` [PATCH v3 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING Changbin Du
2018-10-29 13:05 ` Masahiro Yamada [this message]
2018-10-28 13:09 ` [PATCH v3 4/4] kernel hacking: new config CC_OPTIMIZE_FOR_DEBUGGING to apply GCC -Og optimization Changbin Du
2018-10-29 13:16 ` Masahiro Yamada
2018-10-29 14:54 ` Changbin Du
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