[PATCH] kbuild, sparseirq: work around GCC bug with __weak aliases

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> wrote:

> > I recall David Howells had a similar issue with the bootparamter patch 
> > set. The workaround he used was to add a barrier(); call in the weak 
> > function to avoid the inline.
> 
> could we add some extra attribute to __weak that would have a similar 
> effect? Something like __attribute__((noinline)), or something silly 
> like __attribute__((deprecated)) - just to keep gcc from screwing up 
> __weak functions? Perhaps adding a section attribute would have a 
> similar effect? (putting weak definitions into an extra section is 
> probably helpful anyway)

I've applied the patch below to tip/irq/sparseirq - could someone with an 
affected GCC version please check whether this solves the crash?

	Ingo

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