On Wed, Dec 03, 2014 at 03:18:41PM -0800, Andy Lutomirski wrote:
> It appears that some SCHEDULE_USER (asm for schedule_user) callers
> in arch/x86/kernel/entry_64.S are called from RCU kernel context,
> and schedule_user will return in RCU user context. This causes RCU
> warnings and possible failures.
>
> This is intended to be a minimal fix suitable for 3.18.
>
> Reported-by: Dave Jones <[email protected]>
> Cc: Oleg Nesterov <[email protected]>
> Cc: Frédéric Weisbecker <[email protected]>
> Cc: Paul McKenney <[email protected]>
> Signed-off-by: Andy Lutomirski <[email protected]>
> ---
>
> Hi all-
>
> This is intended to be a suitable last-minute fix for the RCU issue that
> Dave saw.
>
> Dave, can you confirm that this fixes it?
ACK, feel free to add my Tested-by:
Dave
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