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SubjectRe: [GIT PULL] x86/asm changes for 3.20

* Andy Lutomirski <luto@amacapital.net> wrote:

> Hi Ingo and Thomas,
>
> Please consider pulling for x86/asm. The sysret stuff hasn't been in
> -next, but it's been floating around for a while, and got a reasonably
> favorable reception.
>
> If you think it's too late for the sysret stuff for 3.20, then please
> pull just "x86, traps: Fix ist_enter from userspace" instead. It
> fixes a regression.
>
> Thanks,
> Andy
>
> The following changes since commit 772a9aca12567badb5b9caf2af249a5991f47ea8:
>
> Merge tag 'pr-20150114-x86-entry' of
> git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux into x86/asm
> (2015-01-28 15:33:26 +0100)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git
> tags/pr-20150201-x86-entry
>
> for you to fetch changes up to 96b6352c12711d5c0bb7157f49c92580248e8146:
>
> x86_64, entry: Remove the syscall exit audit and schedule
> optimizations (2015-02-01 04:03:02 -0800)
>
> ----------------------------------------------------------------
> x86: Entry cleanups and a bugfix for 3.20
>
> This fixes a bug in the RCU code I added in ist_enter. It also includes
> the sysret stuff discussed here:
>
> http://lkml.kernel.org/g/cover.1421453410.git.luto%40amacapital.net
>
> ----------------------------------------------------------------
> Andy Lutomirski (3):
> x86, traps: Fix ist_enter from userspace
> x86_64, entry: Use sysret to return to userspace when possible
> x86_64, entry: Remove the syscall exit audit and schedule optimizations
>
> arch/x86/kernel/entry_64.S | 106 +++++++++++++++++++++++++--------------------
> arch/x86/kernel/traps.c | 25 ++++++++---
> 2 files changed, 77 insertions(+), 54 deletions(-)

Pulled, thanks a lot Andy!

I'll give it some extra testing before pushing it out into -tip
and then towards linux-next.

Thanks,

Ingo


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