KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked
authorSuresh E. Warrier <warrier@linux.vnet.ibm.com>
Mon, 3 Nov 2014 04:52:00 +0000 (15:52 +1100)
committerAlexander Graf <agraf@suse.de>
Mon, 15 Dec 2014 12:27:25 +0000 (13:27 +0100)
commit1bc5d59c35976d39b39b14f86abb76c08364cf97
treea74507c75182d8e542940477be7f0c3ea7bbea17
parentffada016fb22fbbb9849d3cc5ec72ca8f0377681
KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked

The kvmppc_vcore_blocked() code does not check for the wait condition
after putting the process on the wait queue. This means that it is
possible for an external interrupt to become pending, but the vcpu to
remain asleep until the next decrementer interrupt.  The fix is to
make one last check for pending exceptions and ceded state before
calling schedule().

Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
arch/powerpc/kvm/book3s_hv.c