4 files changed, 46 insertions, 22 deletions

diff --git a/include/asm-ia64/io.h b/include/asm-ia64/io.h
index 43bfff6c6b87..855c30af72a9 100644
--- a/include/asm-ia64/io.h
+++ b/include/asm-ia64/io.h
@@ -417,6 +417,8 @@ __writeq (unsigned long val, volatile void __iomem *addr)
 # define outl_p         outl
 #endif
 
+# ifdef __KERNEL__
+
 extern void __iomem * ioremap(unsigned long offset, unsigned long size);
 extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
 
@@ -430,8 +432,6 @@ iounmap (volatile void __iomem *addr)
 #define dmi_iounmap(x,l) iounmap(x)
 #define dmi_alloc(l) kmalloc(l, GFP_ATOMIC)
 
-# ifdef __KERNEL__
-
 /*
  * String version of IO memory access ops:
  */
diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h
index 2c8fd92d0ece..4283ddcc25fb 100644
--- a/include/asm-ia64/pal.h
+++ b/include/asm-ia64/pal.h
@@ -764,7 +764,7 @@ struct ia64_pal_retval {
  * (generally 0) MUST be passed.  Reserved parameters are not optional
  * parameters.
  */
-extern struct ia64_pal_retval ia64_pal_call_static (u64, u64, u64, u64, u64);
+extern struct ia64_pal_retval ia64_pal_call_static (u64, u64, u64, u64);
 extern struct ia64_pal_retval ia64_pal_call_stacked (u64, u64, u64, u64);
 extern struct ia64_pal_retval ia64_pal_call_phys_static (u64, u64, u64, u64);
 extern struct ia64_pal_retval ia64_pal_call_phys_stacked (u64, u64, u64, u64);
@@ -774,14 +774,7 @@ extern void ia64_load_scratch_fpregs (struct ia64_fpreg *);
 #define PAL_CALL(iprv,a0,a1,a2,a3) do {                 \
         struct ia64_fpreg fr[6];                        \
         ia64_save_scratch_fpregs(fr);                   \
-        iprv = ia64_pal_call_static(a0, a1, a2, a3, 0); \
-        ia64_load_scratch_fpregs(fr);                   \
-} while (0)
-
-#define PAL_CALL_IC_OFF(iprv,a0,a1,a2,a3) do {          \
-        struct ia64_fpreg fr[6];                        \
-        ia64_save_scratch_fpregs(fr);                   \
-        iprv = ia64_pal_call_static(a0, a1, a2, a3, 1); \
+        iprv = ia64_pal_call_static(a0, a1, a2, a3);    \
         ia64_load_scratch_fpregs(fr);                   \
 } while (0)
 
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index 519f0a5ff181..36bb6dacf008 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -200,18 +200,45 @@ extern char empty_zero_page[PAGE_SIZE];
  */
 
 /* Hardware bits in the page table entry */
-#define _PAGE_RO        0x200          /* HW read-only                     */
-#define _PAGE_INVALID   0x400          /* HW invalid                       */
+#define _PAGE_RO        0x200           /* HW read-only bit  */
+#define _PAGE_INVALID   0x400           /* HW invalid bit    */
+#define _PAGE_SWT       0x001           /* SW pte type bit t */
+#define _PAGE_SWX       0x002           /* SW pte type bit x */
 
-/* Mask and six different types of pages. */
-#define _PAGE_TYPE_MASK         0x601
+/* Six different types of pages. */
 #define _PAGE_TYPE_EMPTY        0x400
 #define _PAGE_TYPE_NONE         0x401
-#define _PAGE_TYPE_SWAP         0x600
-#define _PAGE_TYPE_FILE         0x601
+#define _PAGE_TYPE_SWAP         0x403
+#define _PAGE_TYPE_FILE         0x601   /* bit 0x002 is used for offset !! */
 #define _PAGE_TYPE_RO           0x200
 #define _PAGE_TYPE_RW           0x000
 
+/*
+ * PTE type bits are rather complicated. handle_pte_fault uses pte_present,
+ * pte_none and pte_file to find out the pte type WITHOUT holding the page
+ * table lock. ptep_clear_flush on the other hand uses ptep_clear_flush to
+ * invalidate a given pte. ipte sets the hw invalid bit and clears all tlbs
+ * for the page. The page table entry is set to _PAGE_TYPE_EMPTY afterwards.
+ * This change is done while holding the lock, but the intermediate step
+ * of a previously valid pte with the hw invalid bit set can be observed by
+ * handle_pte_fault. That makes it necessary that all valid pte types with
+ * the hw invalid bit set must be distinguishable from the four pte types
+ * empty, none, swap and file.
+ *
+ *                      irxt  ipte  irxt
+ * _PAGE_TYPE_EMPTY     1000   ->   1000
+ * _PAGE_TYPE_NONE      1001   ->   1001
+ * _PAGE_TYPE_SWAP      1011   ->   1011
+ * _PAGE_TYPE_FILE      11?1   ->   11?1
+ * _PAGE_TYPE_RO        0100   ->   1100
+ * _PAGE_TYPE_RW        0000   ->   1000
+ *
+ * pte_none is true for bits combinations 1000, 1100
+ * pte_present is true for bits combinations 0000, 0010, 0100, 0110, 1001
+ * pte_file is true for bits combinations 1101, 1111
+ * swap pte is 1011 and 0001, 0011, 0101, 0111, 1010 and 1110 are invalid.
+ */
+
 #ifndef __s390x__
 
 /* Bits in the segment table entry */
@@ -365,18 +392,21 @@ static inline int pmd_bad(pmd_t pmd)
 
 static inline int pte_none(pte_t pte)
 {
-        return (pte_val(pte) & _PAGE_TYPE_MASK) == _PAGE_TYPE_EMPTY;
+        return (pte_val(pte) & _PAGE_INVALID) && !(pte_val(pte) & _PAGE_SWT);
 }
 
 static inline int pte_present(pte_t pte)
 {
-        return !(pte_val(pte) & _PAGE_INVALID) ||
-                (pte_val(pte) & _PAGE_TYPE_MASK) == _PAGE_TYPE_NONE;
+        unsigned long mask = _PAGE_RO | _PAGE_INVALID | _PAGE_SWT | _PAGE_SWX;
+        return (pte_val(pte) & mask) == _PAGE_TYPE_NONE ||
+                (!(pte_val(pte) & _PAGE_INVALID) &&
+                 !(pte_val(pte) & _PAGE_SWT));
 }
 
 static inline int pte_file(pte_t pte)
 {
-        return (pte_val(pte) & _PAGE_TYPE_MASK) == _PAGE_TYPE_FILE;
+        unsigned long mask = _PAGE_RO | _PAGE_INVALID | _PAGE_SWT;
+        return (pte_val(pte) & mask) == _PAGE_TYPE_FILE;
 }
 
 #define pte_same(a,b)   (pte_val(a) == pte_val(b))
diff --git a/include/asm-s390/unistd.h b/include/asm-s390/unistd.h
index a19238cbcffa..71d3c21b84f0 100644
--- a/include/asm-s390/unistd.h
+++ b/include/asm-s390/unistd.h
@@ -249,8 +249,9 @@
 #define __NR_vmsplice           309
 /* Number 310 is reserved for new sys_move_pages */
 #define __NR_getcpu             311
+#define __NR_epoll_pwait        312
 
-#define NR_syscalls 312
+#define NR_syscalls 313
 
 /* 
  * There are some system calls that are not present on 64 bit, some