Re: [PATCH 1/2] x86: profiling: remove lock functions hack for !FRAME_POINTER

[Josh Poimboeuf]

On Wed, Apr 12, 2023 at 10:01:18AM +0000, David Laight wrote:
> From: Chen Zhongjin
> > Sent: 12 April 2023 08:02
> ...
> > > 4. !CONFIG_FRAME_POINTER is probably even more rare today than it was in
> > >     2006
> >
> > No. !CONFIG_FRAME_POINTER is more common today because of UNWINDER_ORC.
> > And that is why the bug is triggered more frequently.
> 
> CONFIG_FRAME_POINTER is pretty much required (on x86-64)
> for the user copy checks that are enabled in distro kernels.

CONFIG_FRAME_POINTER is pretty much deprecated.  The only distro still
using it (that I know of) is Ubuntu.

-- 
Josh