Merge tag 'for-linus-7.2a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - rename function parameters and a comment related to
   xen_exchange_memory() (Jan Beulich)

 - replace __ASSEMBLY__ with __ASSEMBLER__ (Thomas Huth)

 - add some sanity checking to the Xen pvcalls frontend driver (Michael
   Bommarito)

 - fix error handling in the Xen gntdev driver (Wentao Liang)

 - fix several minor bugs in Xen related drivers (Yousef Alhouseen)

* tag 'for-linus-7.2a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/Xen: correct commentary and parameter naming of xen_exchange_memory()
  xenbus: reject unterminated directory replies
  xen/gntalloc: validate grant count before allocation
  xen/gntalloc: make grant counters unsigned
  xen/front-pgdir-shbuf: free grant reference head on errors
  xen/gntdev: fix error handling in ioctl
  xen: Replace __ASSEMBLY__ with __ASSEMBLER__ in header files
  xen/pvcalls: bound backend response req_id before indexing rsp[]

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index aab5f70d407c..820af6f0aa57 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -2291,18 +2291,19 @@ static void xen_remap_exchanged_ptes(unsigned long vaddr, int order,
 }
 
 /*
- * Perform the hypercall to exchange a region of our pfns to point to
- * memory with the required contiguous alignment.  Takes the pfns as
- * input, and populates mfns as output.
+ * Perform the hypercall to exchange a region of our pages to point to memory
+ * with the required contiguous alignment.  Takes as input the mfns to trade
+ * in (mfns_in) and the pfns where the new pages are to appear (fns_inout),
+ * and populates mfns as output (fns_inout).
  *
  * Returns a success code indicating whether the hypervisor was able to
  * satisfy the request or not.
  */
 static int xen_exchange_memory(unsigned long extents_in, unsigned int order_in,
-			       unsigned long *pfns_in,
+			       unsigned long *mfns_in,
 			       unsigned long extents_out,
 			       unsigned int order_out,
-			       unsigned long *mfns_out,
+			       unsigned long *fns_inout,
 			       unsigned int address_bits)
 {
 	long rc;
@@ -2312,13 +2313,13 @@ static int xen_exchange_memory(unsigned long extents_in, unsigned int order_in,
 		.in = {
 			.nr_extents   = extents_in,
 			.extent_order = order_in,
-			.extent_start = pfns_in,
+			.extent_start = mfns_in,
 			.domid        = DOMID_SELF
 		},
 		.out = {
 			.nr_extents   = extents_out,
 			.extent_order = order_out,
-			.extent_start = mfns_out,
+			.extent_start = fns_inout,
 			.address_bits = address_bits,
 			.domid        = DOMID_SELF
 		}