Gunnar Beutner 55ae52fdf8 Kernel: Enable building the kernel with -flto ...

GCC with -flto is more aggressive when it comes to inlining and
discarding functions which is why we must mark some of the functions
as NEVER_INLINE (because they contain asm labels which would be
duplicated in the object files if the compiler decides to inline
the function elsewhere) and __attribute__((used)) for others so
that GCC doesn't discard them.

2021-04-29 20:26:36 +02:00

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