[s390] Add pgste to ptep_modify_prot_start()

Fixes build breakage in 3.9.5.

svn path=/dists/sid/linux/; revision=20219

debian/changelog

@@ -47,6 +47,8 @@ linux (3.9.5-1) UNRELEASED; urgency=low
 
   [ Ben Hutchings ]
   * [powerpcspe] Remove installer udebs (really fixes FTBFS)
+  * [s390] Add pgste to ptep_modify_prot_start()
+  
 
  -- Ben Hutchings <ben@decadent.org.uk>  Sat, 08 Jun 2013 15:25:11 +0100
 

debian/patches/bugfix/s390/s390-add-pgste-to-ptep_modify_prot_start.patch

@@ -0,0 +1,30 @@
+From: Ben Hutchings <ben@decadent.org.uk>
+Date: Sun, 09 Jun 2013 16:54:12 +0100
+Subject: s390: Add pgste to ptep_modify_prot_start()
+Forwarded: http://article.gmane.org/gmane.linux.kernel.stable/55564
+
+Commit 52f36be0f4e2 's390/pgtable: Fix check for pgste/storage key
+handling', which was commit b56433cb782d upstream, added a use of
+pgste to ptep_modify_prot_start(), but this variable does not exist.
+In mainline, pgste was added by commit d3383632d4e8 's390/mm: add pte
+invalidation notifier for kvm' and initialised to the return value of
+pgste_get_lock(ptep).  Initialise it similarly here.
+
+Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
+---
+--- a/arch/s390/include/asm/pgtable.h
++++ b/arch/s390/include/asm/pgtable.h
+@@ -1063,11 +1063,12 @@ static inline pte_t ptep_modify_prot_sta
+ 					   unsigned long address,
+ 					   pte_t *ptep)
+ {
++	pgste_t pgste;
+ 	pte_t pte;
+ 
+ 	mm->context.flush_mm = 1;
+ 	if (mm_has_pgste(mm))
+-		pgste_get_lock(ptep);
++		pgste = pgste_get_lock(ptep);
+ 
+ 	pte = *ptep;
+ 	if (!mm_exclusive(mm))

debian/patches/series

@@ -104,3 +104,4 @@ features/arm/imx53-qsb-usb-power.patch
 features/arm/0001-thermal-Add-driver-for-Armada-370-XP-SoC-thermal-man.patch
 features/arm/0001-ARM-mvebu-Add-thermal-support-to-Armada-XP-device-tr.patch 
 
+bugfix/s390/s390-add-pgste-to-ptep_modify_prot_start.patch