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Two very simple bugfixes, affecting all supported architectures.

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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Two very simple bugfixes, affecting all supported architectures"

[ Two? There's three commits in here.  Oh well, I guess Paolo didn't
  count the preparatory symbol export ]

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: correct null pid check in kvm_vcpu_yield_to()
  KVM: check for !is_zero_pfn() in kvm_is_mmio_pfn()
  mm: export symbol dependencies of is_zero_pfn()
This commit is contained in:
Linus Torvalds 2014-09-22 11:58:23 -07:00
commit b0e2a55c65
4 changed files with 6 additions and 2 deletions
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1
arch/mips/mm/init.c
View file

@ -53,6 +53,7 @@
*/
unsigned long empty_zero_page, zero_page_mask;
EXPORT_SYMBOL_GPL(empty_zero_page);
EXPORT_SYMBOL(zero_page_mask);
/*
* Not static inline because used by IP27 special magic initialization code

1
arch/s390/mm/init.c
View file

@ -43,6 +43,7 @@ pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE)));
unsigned long empty_zero_page, zero_page_mask;
EXPORT_SYMBOL(empty_zero_page);
EXPORT_SYMBOL(zero_page_mask);
static void __init setup_zero_pages(void)
{

2
mm/memory.c
View file

@ -118,6 +118,8 @@ __setup("norandmaps", disable_randmaps);
unsigned long zero_pfn __read_mostly;
unsigned long highest_memmap_pfn __read_mostly;
EXPORT_SYMBOL(zero_pfn);
/*
* CONFIG_MMU architectures set up ZERO_PAGE in their paging_init()
*/

4
virt/kvm/kvm_main.c
View file

@ -110,7 +110,7 @@ static bool largepages_enabled = true;
bool kvm_is_mmio_pfn(pfn_t pfn)
{
if (pfn_valid(pfn))
return PageReserved(pfn_to_page(pfn));
return !is_zero_pfn(pfn) && PageReserved(pfn_to_page(pfn));
return true;
}
@ -1725,7 +1725,7 @@ int kvm_vcpu_yield_to(struct kvm_vcpu *target)
rcu_read_lock();
pid = rcu_dereference(target->pid);
if (pid)
task = get_pid_task(target->pid, PIDTYPE_PID);
task = get_pid_task(pid, PIDTYPE_PID);
rcu_read_unlock();
if (!task)
return ret;