Re: [PATCH 17/22] arm64: vdso: disable LTO

[Sami Tolvanen]

On Wed, Jun 24, 2020 at 01:58:57PM -0700, 'Nick Desaulniers' via Clang Built Linux wrote:
> On Wed, Jun 24, 2020 at 1:33 PM Sami Tolvanen <samitolvanen@xxxxxxxxxx> wrote:
> >
> > Filter out CC_FLAGS_LTO for the vDSO.
> 
> Just curious about this patch (and the following one for x86's vdso),
> do you happen to recall specifically what the issues with the vdso's
> are?

I recall the compiler optimizing away functions at some point, but as
LTO is not really needed in the vDSO, it's just easiest to disable it
there.

Sami