[Xen-devel] [PATCH] UNTESTED backport rcu_needs_cpu and call it from stop_hz_timer UNTESTED

[Harry Butterworth <harry@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

THIS PATCH FOR REVIEW ONLY IT'S UNTESTED!!!!!!  Ill test on Monday if
no-one has done it by then.

There is a problem with the current implementation of stop_hz_timer in
arch/i386/kernel/time-xen.c where the hz timer can be stopped on a CPU
which has RCU callbacks pending.

This patch backports a new RCU API created to fix this problem for the
s390 implementation of stop_hz_timer and also updates the time-xen.c
implementation of stop_hz_timer to call the new API.

Signed-off-by: Harry Butterworth <butterwo@xxxxxxxxxx>

Attachment: rcu_needs_cpu.patch
Description: Text Data

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