On Tue, Jan 24, 2017 at 7:15 AM, Michael Ellerman [off-list ref] wrote:

Hmm, in fact it seems because we don't define
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING and CONFIG_OPTIMIZE_INLINING, we
get:

#define inline          inline          __attribute__((always_inline)) notrace

So in fact every inline function is marked always_inline all the time,
which seems dubious.

But still, it seems clang is ignoring always_inline.

I think the problem is that __builtin_constant_p() is usually false on
clang, at least for arguments
that are not constant pointers.

    Arnd