diff options
| author | Tony Lindgren <tony@atomide.com> | 2016-03-30 20:36:06 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2016-03-30 20:36:06 +0300 |
| commit | 1809de7e7d37c585e01a1bcc583ea92b78fc759d (patch) | |
| tree | 76c5b35c2b04eafce86a1a729c02ab705eba44bc /virt/kvm/async_pf.c | |
| parent | ebf24414809200915b9ddf7f109bba7c278c8210 (diff) | |
| parent | 3ca4a238106dedc285193ee47f494a6584b6fd2f (diff) | |
| download | linux-1809de7e7d37c585e01a1bcc583ea92b78fc759d.tar.xz | |
Merge tag 'for-v4.6-rc/omap-fixes-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v4.6/fixes
ARM: OMAP2+: first hwmod fix for v4.6-rc
Fix a longstanding bug in the hwmod code that could cause
hardware SYSCONFIG register values to not match the kernel's
idea of what they should be, and that could result in lower
performance during IP block idle entry.
Basic build, boot, and PM test logs are available here:
http://www.pwsan.com/omap/testlogs/omap-hwmod-fixes-a-for-v4.6-rc/20160326231727/
Diffstat (limited to 'virt/kvm/async_pf.c')
| -rw-r--r-- | virt/kvm/async_pf.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index 353159922456..db9668869f6f 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -79,7 +79,13 @@ static void async_pf_execute(struct work_struct *work) might_sleep(); - get_user_pages_unlocked(NULL, mm, addr, 1, 1, 0, NULL); + /* + * This work is run asynchromously to the task which owns + * mm and might be done in another context, so we must + * use FOLL_REMOTE. + */ + __get_user_pages_unlocked(NULL, mm, addr, 1, 1, 0, NULL, FOLL_REMOTE); + kvm_async_page_present_sync(vcpu, apf); spin_lock(&vcpu->async_pf.lock); @@ -97,8 +103,8 @@ static void async_pf_execute(struct work_struct *work) * This memory barrier pairs with prepare_to_wait's set_current_state() */ smp_mb(); - if (waitqueue_active(&vcpu->wq)) - wake_up_interruptible(&vcpu->wq); + if (swait_active(&vcpu->wq)) + swake_up(&vcpu->wq); mmput(mm); kvm_put_kvm(vcpu->kvm); @@ -109,8 +115,8 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu) /* cancel outstanding work queue item */ while (!list_empty(&vcpu->async_pf.queue)) { struct kvm_async_pf *work = - list_entry(vcpu->async_pf.queue.next, - typeof(*work), queue); + list_first_entry(&vcpu->async_pf.queue, + typeof(*work), queue); list_del(&work->queue); #ifdef CONFIG_KVM_ASYNC_PF_SYNC @@ -127,8 +133,8 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu) spin_lock(&vcpu->async_pf.lock); while (!list_empty(&vcpu->async_pf.done)) { struct kvm_async_pf *work = - list_entry(vcpu->async_pf.done.next, - typeof(*work), link); + list_first_entry(&vcpu->async_pf.done, + typeof(*work), link); list_del(&work->link); kmem_cache_free(async_pf_cache, work); } @@ -172,7 +178,7 @@ int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva, * do alloc nowait since if we are going to sleep anyway we * may as well sleep faulting in page */ - work = kmem_cache_zalloc(async_pf_cache, GFP_NOWAIT); + work = kmem_cache_zalloc(async_pf_cache, GFP_NOWAIT | __GFP_NOWARN); if (!work) return 0; |