On Wed, Apr 11, 2018 at 11:54 AM, James Hogan <jho...@kernel.org> wrote:
> On Wed, Apr 11, 2018 at 09:30:56AM +0200, Arnd Bergmann wrote:
>> On Wed, Apr 11, 2018 at 12:48 AM, James Hogan <jho...@kernel.org> wrote:
>> > Before I forward port those patches to add .insn for MIPS, is that sort
>> > of approach (an arch specific asm/compiler-gcc.h to allow MIPS to
>> > override barrier_before_unreachable()) an acceptable fix?
>>
>> That sounds fine to me. However, I would suggest making that
>> asm/compiler.h instead of asm/compiler-gcc.h, so we can also
>> use the same file to include workarounds for clang if needed.
>
> Yes, though there are a few asm/compiler.h's already, and the alpha one
> includes linux/compiler.h before undefining inline, so seems to have its
> own specific purpose...

Interesting. For the other ones, including asm/compiler.h from linux/compiler.h
seems appropriate though, so the question would be what to do with the
alpha case. I think we can simply remove that header file and replace
it with this patch:

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index b2022885ced8..5502404f54cd 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -81,6 +81,9 @@ config PGTABLE_LEVELS
        int
        default 3

+config OPTIMIZE_INLINING
+       def_bool y
+
 source "init/Kconfig"
 source "kernel/Kconfig.freezer"

which should have the same effect.
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