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KVM: introduce KVM_ERR_PTR_BAD_PAGE 

It is used to eliminate the overload of function call and cleanup
the code

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2012-08-03 15:41:22 +08:00 committed by Avi Kivity
parent 9a592a9538
commit 6cede2e679
3 changed files with 9 additions and 15 deletions
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9
include/linux/kvm_host.h
View File

@ -68,6 +68,13 @@ static inline int is_invalid_pfn(pfn_t pfn)
return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
}
#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
static inline int is_error_page(struct page *page)
{
return IS_ERR(page);
}
/*
* vcpu->requests bit members
*/
@ -409,7 +416,6 @@ id_to_memslot(struct kvm_memslots *slots, int id)
return slot;
}
int is_error_page(struct page *page);
int kvm_is_error_hva(unsigned long addr);
int kvm_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
@ -436,7 +442,6 @@ void kvm_arch_flush_shadow(struct kvm *kvm);
int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
int nr_pages);
struct page *get_bad_page(void);
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
void kvm_release_page_clean(struct page *page);

2
virt/kvm/async_pf.c
View File

@ -203,7 +203,7 @@ int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
if (!work)
return -ENOMEM;
work->page = get_bad_page();
work->page = KVM_ERR_PTR_BAD_PAGE;
INIT_LIST_HEAD(&work->queue); /* for list_del to work */
spin_lock(&vcpu->async_pf.lock);

13
virt/kvm/kvm_main.c
View File

@ -922,17 +922,6 @@ void kvm_disable_largepages(void)
}
EXPORT_SYMBOL_GPL(kvm_disable_largepages);
int is_error_page(struct page *page)
{
return IS_ERR(page);
}
EXPORT_SYMBOL_GPL(is_error_page);
struct page *get_bad_page(void)
{
return ERR_PTR(-ENOENT);
}
static inline unsigned long bad_hva(void)
{
return PAGE_OFFSET;
@ -1179,7 +1168,7 @@ static struct page *kvm_pfn_to_page(pfn_t pfn)
WARN_ON(kvm_is_mmio_pfn(pfn));
if (is_error_pfn(pfn) || kvm_is_mmio_pfn(pfn))
return get_bad_page();
return KVM_ERR_PTR_BAD_PAGE;
return pfn_to_page(pfn);
}