Re: [PATCH] mm/migrate: Mark unmap_and_move() "noinline" to avoid ICE in gcc 4.7.3

[Russell King - ARM Linux]

On Wed, Apr 01, 2015 at 02:54:59PM -0700, Kevin Hilman wrote:
> Your patch on top of Geert's still compiles fine for me with gcc-4.7.3.
> However, I'm not sure how specific we can be on the versions.  
> 
> /me goes to test a few more compilers...   OK...
> 
> ICE: 4.7.1, 4.7.3, 4.8.3
> OK: 4.6.3, 4.9.2, 4.9.3
> 
> The diff below[2] on top of yours compiles fine here and at least covers
> the compilers I *know* to trigger the ICE.

Interesting.  I'm using stock gcc 4.7.4 here, though I'm not building
-next (only mainline + my tree + arm-soc) and it hasn't shown a problem
yet.

I think we need to ask the question: is the bug in stock GCC or Linaro
GCC?  If it's not in stock GCC, then it's a GCC vendor problem :)

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