Re: linux-next: build failure after merge of the drm-intel-fixes tree

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Quoting Stephen Rothwell (2018-05-29 12:26:05)
> Hi all,
> 
> After merging the drm-intel-fixes tree, today's linux-next build (i386
> defconfig) failed like this:

Thanks for reporting. I've added a patch to fix the issue now.

I'll talk with our CI team about testing 32-bit building to try to
avoid these in the future.

Regards, Joonas

> 
> In file included from include/asm-generic/barrier.h:20:0,
>                  from arch/x86/include/asm/barrier.h:86,
>                  from include/linux/nospec.h:8,
>                  from drivers/gpu/drm/i915/i915_query.c:7:
> drivers/gpu/drm/i915/i915_query.c: In function 'i915_query_ioctl':
> include/linux/compiler.h:339:38: error: call to '__compiletime_assert_119' declared with attribute error: BUILD_BUG_ON failed: sizeof(_s) > sizeof(long)
>   _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>                                       ^
> include/linux/compiler.h:319:4: note: in definition of macro '__compiletime_assert'
>     prefix ## suffix();    \
>     ^~~~~~
> include/linux/compiler.h:339:2: note: in expansion of macro '_compiletime_assert'
>   _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>   ^~~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert'
>  #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
>                                      ^~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:69:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
>   BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
>   ^~~~~~~~~~~~~~~~
> include/linux/nospec.h:55:2: note: in expansion of macro 'BUILD_BUG_ON'
>   BUILD_BUG_ON(sizeof(_i) > sizeof(long));   \
>   ^~~~~~~~~~~~
> drivers/gpu/drm/i915/i915_query.c:118:15: note: in expansion of macro 'array_index_nospec'
>     func_idx = array_index_nospec(func_idx,
>                ^~~~~~~~~~~~~~~~~~
> 
> Caused by commit
> 
>   540ead8c5a0e ("drm/i915/query: Protect tainted function pointer lookup")
> 
> I have reverted that commit for today.
> 
> -- 
> Cheers,
> Stephen Rothwell
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