Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] Poison init section before freeing it.
  [S390] Use add_active_range() and free_area_init_nodes().
  [S390] Virtual memmap for s390.
  [S390] Update documentation for dynamic subchannel mapping.
  [S390] Use dev->groups for adding/removing the subchannel attribute group.
  [S390] Support for disconnected devices reappearing on another subchannel.
  [S390] subchannel lock conversion.
  [S390] Some preparations for the dynamic subchannel mapping patch.
  [S390] runtime switch for qdio performance statistics
  [S390] New DASD feature for ERP related logging
  [S390] add reset call handler to the ap bus.
  [S390] more workqueue fixes.
  [S390] workqueue fixes.
  [S390] uaccess_pt: add missing down_read() and convert to is_init().

include/asm-s390/dasd.h

@@ -69,11 +69,13 @@ typedef struct dasd_information2_t {
  * 0x01: readonly (ro)
  * 0x02: use diag discipline (diag)
  * 0x04: set the device initially online (internal use only)
+ * 0x08: enable ERP related logging
  */
 #define DASD_FEATURE_DEFAULT	     0x00
 #define DASD_FEATURE_READONLY	     0x01
 #define DASD_FEATURE_USEDIAG	     0x02
 #define DASD_FEATURE_INITIAL_ONLINE  0x04
+#define DASD_FEATURE_ERPLOG	     0x08
 
 #define DASD_PARTN_BITS 2
 

include/asm-s390/page.h

@@ -127,6 +127,26 @@ page_get_storage_key(unsigned long addr)
 	return skey;
 }
 
+extern unsigned long max_pfn;
+
+static inline int pfn_valid(unsigned long pfn)
+{
+	unsigned long dummy;
+	int ccode;
+
+	if (pfn >= max_pfn)
+		return 0;
+
+	asm volatile(
+		"	lra	%0,0(%2)\n"
+		"	ipm	%1\n"
+		"	srl	%1,28\n"
+		: "=d" (dummy), "=d" (ccode)
+		: "a" (pfn << PAGE_SHIFT)
+		: "cc");
+	return !ccode;
+}
+
 #endif /* !__ASSEMBLY__ */
 
 /* to align the pointer to the (next) page boundary */
@@ -138,8 +158,6 @@ page_get_storage_key(unsigned long addr)
 #define __va(x)                 (void *)(unsigned long)(x)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \

include/asm-s390/pgalloc.h

@@ -25,8 +25,11 @@ extern void diag10(unsigned long addr);
  * Page allocation orders.
  */
 #ifndef __s390x__
+# define PTE_ALLOC_ORDER	0
+# define PMD_ALLOC_ORDER	0
 # define PGD_ALLOC_ORDER	1
 #else /* __s390x__ */
+# define PTE_ALLOC_ORDER	0
 # define PMD_ALLOC_ORDER	2
 # define PGD_ALLOC_ORDER	2
 #endif /* __s390x__ */

include/asm-s390/pgtable.h

@@ -107,23 +107,25 @@ extern char empty_zero_page[PAGE_SIZE];
  * The vmalloc() routines leaves a hole of 4kB between each vmalloced
  * area for the same reason. ;)
  */
+extern unsigned long vmalloc_end;
 #define VMALLOC_OFFSET  (8*1024*1024)
 #define VMALLOC_START   (((unsigned long) high_memory + VMALLOC_OFFSET) \
 			 & ~(VMALLOC_OFFSET-1))
+#define VMALLOC_END	vmalloc_end
 
 /*
  * We need some free virtual space to be able to do vmalloc.
  * VMALLOC_MIN_SIZE defines the minimum size of the vmalloc
  * area. On a machine with 2GB memory we make sure that we
  * have at least 128MB free space for vmalloc. On a machine
- * with 4TB we make sure we have at least 1GB.
+ * with 4TB we make sure we have at least 128GB.
  */
 #ifndef __s390x__
 #define VMALLOC_MIN_SIZE	0x8000000UL
-#define VMALLOC_END		0x80000000UL
+#define VMALLOC_END_INIT	0x80000000UL
 #else /* __s390x__ */
-#define VMALLOC_MIN_SIZE	0x40000000UL
-#define VMALLOC_END		0x40000000000UL
+#define VMALLOC_MIN_SIZE	0x2000000000UL
+#define VMALLOC_END_INIT	0x40000000000UL
 #endif /* __s390x__ */
 
 /*
@@ -815,11 +817,17 @@ static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
 
 #define kern_addr_valid(addr)   (1)
 
+extern int add_shared_memory(unsigned long start, unsigned long size);
+extern int remove_shared_memory(unsigned long start, unsigned long size);
+
 /*
  * No page table caches to initialise
  */
 #define pgtable_cache_init()	do { } while (0)
 
+#define __HAVE_ARCH_MEMMAP_INIT
+extern void memmap_init(unsigned long, int, unsigned long, unsigned long);
+
 #define __HAVE_ARCH_PTEP_ESTABLISH
 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG