xen/privcmd: print SIGBUS faults
Print more detail about privcmd mapping faults for debugging.
[ Impact: debug ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c
index c7192f3..6b602f5 100644
--- a/drivers/xen/xenfs/privcmd.c
+++ b/drivers/xen/xenfs/privcmd.c
@@ -403,6 +403,10 @@
#ifndef HAVE_ARCH_PRIVCMD_MMAP
static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
+ printk(KERN_DEBUG "privcmd_fault: vma=%p %lx-%lx, pgoff=%lx, uv=%p\n",
+ vma, vma->vm_start, vma->vm_end,
+ vmf->pgoff, vmf->virtual_address);
+
return VM_FAULT_SIGBUS;
}