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SubjectRe: [PATCH 0/7] ARM: hacks for link-time optimization
On Tue, Feb 20, 2018 at 10:59:47PM +0100, Arnd Bergmann wrote:
> Hi Nico, all,
>
> I was playing with ARM link-time optimization handling earlier this
> month, and eventually got it to build cleanly with randconfig kernels,
> but ended up with a lot of ugly hacks to actually pull it off.

How are we dealing with the fact that LTO can break RCU in very subtle
and scary ways?

Do we have a compiler guy on board that has given us a compiler switch
that kills that optimization (and thereby guarantees that behaviour for
future compilers etc..) ?

Also see the thread here:

https://lkml.kernel.org/r/20171116115810.GH9361@arm.com

(and yes, this is a fine example of how lore sucks for reading email)


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