Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Recent bug fixes, one of them touches a common code file.

  It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to
  override xlate_dev_kmem_ptr and xlate_dev_mem_ptr."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pgtable: Fix gmap notifier address
  s390/dasd: fix handling of gone paths
  s390/pgtable: Fix check for pgste/storage key handling
  arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()
  s390/smp: lost IPIs on cpu hotplug
  kernel: Fix s390 absolute memory access for /dev/mem
  s390/dma: do not call debug_dma after free

3 files changed, 13 insertions, 5 deletions

diff --git a/arch/s390/include/asm/dma-mapping.h b/arch/s390/include/asm/dma-mapping.h
index 9411db653ba..886ac7d4937 100644
--- a/arch/s390/include/asm/dma-mapping.h
+++ b/arch/s390/include/asm/dma-mapping.h
@@ -71,8 +71,8 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
 {
 	struct dma_map_ops *dma_ops = get_dma_ops(dev);
 
-	dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
 	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+	dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
 }
 
 #endif /* _ASM_S390_DMA_MAPPING_H */
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 379d96e2105..fd9be010f9b 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -36,6 +36,7 @@ static inline void * phys_to_virt(unsigned long address)
 }
 
 void *xlate_dev_mem_ptr(unsigned long phys);
+#define xlate_dev_mem_ptr xlate_dev_mem_ptr
 void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
 
 /*
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0f0de30e3e3..ac01463038f 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -646,7 +646,7 @@ static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)
 	unsigned long address, bits;
 	unsigned char skey;
 
-	if (!pte_present(*ptep))
+	if (pte_val(*ptep) & _PAGE_INVALID)
 		return pgste;
 	address = pte_val(*ptep) & PAGE_MASK;
 	skey = page_get_storage_key(address);
@@ -680,7 +680,7 @@ static inline pgste_t pgste_update_young(pte_t *ptep, pgste_t pgste)
 #ifdef CONFIG_PGSTE
 	int young;
 
-	if (!pte_present(*ptep))
+	if (pte_val(*ptep) & _PAGE_INVALID)
 		return pgste;
 	/* Get referenced bit from storage key */
 	young = page_reset_referenced(pte_val(*ptep) & PAGE_MASK);
@@ -706,7 +706,7 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry)
 	unsigned long address;
 	unsigned long okey, nkey;
 
-	if (!pte_present(entry))
+	if (pte_val(entry) & _PAGE_INVALID)
 		return;
 	address = pte_val(entry) & PAGE_MASK;
 	okey = nkey = page_get_storage_key(address);
@@ -1098,6 +1098,9 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
 	pte = *ptep;
 	if (!mm_exclusive(mm))
 		__ptep_ipte(address, ptep);
+
+	if (mm_has_pgste(mm))
+		pgste = pgste_update_all(&pte, pgste);
 	return pte;
 }
 
@@ -1105,9 +1108,13 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm,
 					   unsigned long address,
 					   pte_t *ptep, pte_t pte)
 {
+	pgste_t pgste;
+
 	if (mm_has_pgste(mm)) {
+		pgste = *(pgste_t *)(ptep + PTRS_PER_PTE);
+		pgste_set_key(ptep, pgste, pte);
 		pgste_set_pte(ptep, pte);
-		pgste_set_unlock(ptep, *(pgste_t *)(ptep + PTRS_PER_PTE));
+		pgste_set_unlock(ptep, pgste);
 	} else
 		*ptep = pte;
 }