Merge tag 'mxs-dt-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/dt

From Shawn Guo:

mxs device tree changes for 3.11:

* A couple of new board support, cfa10055 and cfa10057
* A few updates on cfa10036 device tree source
* Some auart pinctrl data addition
* Adopt soc bus infrastructure for mach-mxs

* tag 'mxs-dt-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6:
  ARM: mxs: dt: Add Crystalfontz CFA-10057 device tree
  ARM: mxs: dt: Add the Crystalfontz CFA-10055 device tree
  ARM: cfa10049: Switch the chip select pin of the LCD controller
  ARM: cfa10036: Add USB0 OTG port
  ARM: dts: apf28dev: Add touchscreen support for APF28dev
  ARM: mxs: Fix UARTs on M28EVK
  ARM: cfa10036: dt: Change i2c0 clock frequency
  ARM: dts: cfa10036: Change the OLED display to SSD1306
  ARM: mx28: add auart4 2 pins pinmux to imx28.dtsi
  ARM: mx28: add auart3 2 pins pinmux to imx28.dtsi
  ARM: mx28: add auart2 2 pins pinmux to imx28.dtsi
  ARM: mxs: Use soc bus infrastructure
  ARM: dts: mx28: Adjust the digctl compatible string
  ARM: mxs: Remove init_irq declaration in machine description

Includes an update to 3.10-rc6

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 22 insertions, 10 deletions

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index ac01463038f1..e8b6e5b8932c 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -623,7 +623,7 @@ static inline pgste_t pgste_get_lock(pte_t *ptep)
 		"	csg	%0,%1,%2\n"
 		"	jl	0b\n"
 		: "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE])
-		: "Q" (ptep[PTRS_PER_PTE]) : "cc");
+		: "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory");
 #endif
 	return __pgste(new);
 }
@@ -635,11 +635,19 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
 		"	nihh	%1,0xff7f\n"	/* clear RCP_PCL_BIT */
 		"	stg	%1,%0\n"
 		: "=Q" (ptep[PTRS_PER_PTE])
-		: "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) : "cc");
+		: "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE])
+		: "cc", "memory");
 	preempt_enable();
 #endif
 }
 
+static inline void pgste_set(pte_t *ptep, pgste_t pgste)
+{
+#ifdef CONFIG_PGSTE
+	*(pgste_t *)(ptep + PTRS_PER_PTE) = pgste;
+#endif
+}
+
 static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)
 {
 #ifdef CONFIG_PGSTE
@@ -704,17 +712,19 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry)
 {
 #ifdef CONFIG_PGSTE
 	unsigned long address;
-	unsigned long okey, nkey;
+	unsigned long nkey;
 
 	if (pte_val(entry) & _PAGE_INVALID)
 		return;
+	VM_BUG_ON(!(pte_val(*ptep) & _PAGE_INVALID));
 	address = pte_val(entry) & PAGE_MASK;
-	okey = nkey = page_get_storage_key(address);
-	nkey &= ~(_PAGE_ACC_BITS | _PAGE_FP_BIT);
-	/* Set page access key and fetch protection bit from pgste */
-	nkey |= (pgste_val(pgste) & (RCP_ACC_BITS | RCP_FP_BIT)) >> 56;
-	if (okey != nkey)
-		page_set_storage_key(address, nkey, 0);
+	/*
+	 * Set page access key and fetch protection bit from pgste.
+	 * The guest C/R information is still in the PGSTE, set real
+	 * key C/R to 0.
+	 */
+	nkey = (pgste_val(pgste) & (RCP_ACC_BITS | RCP_FP_BIT)) >> 56;
+	page_set_storage_key(address, nkey, 0);
 #endif
 }
 
@@ -1099,8 +1109,10 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
 	if (!mm_exclusive(mm))
 		__ptep_ipte(address, ptep);
 
-	if (mm_has_pgste(mm))
+	if (mm_has_pgste(mm)) {
 		pgste = pgste_update_all(&pte, pgste);
+		pgste_set(ptep, pgste);
+	}
 	return pte;
 }