Re: [PATCH -next] KVM: use vma_pages() helper

From: Paolo Bonzini
Date: Wed Sep 29 2021 - 08:56:47 EST


On 29/09/21 09:28, Yang Li wrote:
Use vma_pages function on vma object instead of explicit computation.

Fix the following coccicheck warning:
./virt/kvm/kvm_main.c:3526:29-35: WARNING: Consider using vma_pages
helper on vma

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7851f3a..8f0e9ea 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3523,7 +3523,7 @@ static vm_fault_t kvm_vcpu_fault(struct vm_fault *vmf)
static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
{
struct kvm_vcpu *vcpu = file->private_data;
- unsigned long pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+ unsigned long pages = vma_pages(vma);
if ((kvm_page_in_dirty_ring(vcpu->kvm, vma->vm_pgoff) ||
kvm_page_in_dirty_ring(vcpu->kvm, vma->vm_pgoff + pages - 1)) &&


Queued, thanks.

Paolo