8 files changed, 51 insertions, 45 deletions

diff --git a/include/asm-ppc64/a.out.h b/include/asm-ppc64/a.out.h
index 802338efcb19..3871e252a6f1 100644
--- a/include/asm-ppc64/a.out.h
+++ b/include/asm-ppc64/a.out.h
@@ -1,8 +1,6 @@
 #ifndef __PPC64_A_OUT_H__
 #define __PPC64_A_OUT_H__
 
-#include <asm/ppcdebug.h>
-
 /*
  * c 2001 PPC 64 Team, IBM Corp
  *
diff --git a/include/asm-ppc64/bug.h b/include/asm-ppc64/bug.h
index db31dd22233c..169868fa307d 100644
--- a/include/asm-ppc64/bug.h
+++ b/include/asm-ppc64/bug.h
@@ -26,6 +26,8 @@ struct bug_entry *find_bug(unsigned long bugaddr);
  */
 #define BUG_WARNING_TRAP        0x1000000
 
+#ifdef CONFIG_BUG
+
 #define BUG() do {                                                       \
         __asm__ __volatile__(                                            \
                 "1:     twi 31,0,0\n"                                    \
@@ -55,11 +57,12 @@ struct bug_entry *find_bug(unsigned long bugaddr);
                     "i" (__FILE__), "i" (__FUNCTION__));        \
 } while (0)
 
-#endif
-
 #define HAVE_ARCH_BUG
 #define HAVE_ARCH_BUG_ON
 #define HAVE_ARCH_WARN_ON
+#endif
+#endif
+
 #include <asm-generic/bug.h>
 
 #endif
diff --git a/include/asm-ppc64/elf.h b/include/asm-ppc64/elf.h
index 8457d90244fb..6c42d61bedd1 100644
--- a/include/asm-ppc64/elf.h
+++ b/include/asm-ppc64/elf.h
@@ -229,9 +229,13 @@ do {								\
 
 /*
  * An executable for which elf_read_implies_exec() returns TRUE will
- * have the READ_IMPLIES_EXEC personality flag set automatically.
+ * have the READ_IMPLIES_EXEC personality flag set automatically. This
+ * is only required to work around bugs in old 32bit toolchains. Since
+ * the 64bit ABI has never had these issues dont enable the workaround
+ * even if we have an executable stack.
  */
-#define elf_read_implies_exec(ex, exec_stk)     (exec_stk != EXSTACK_DISABLE_X)
+#define elf_read_implies_exec(ex, exec_stk) (test_thread_flag(TIF_32BIT) ? \
+                (exec_stk != EXSTACK_DISABLE_X) : 0)
 
 #endif
 
diff --git a/include/asm-ppc64/page.h b/include/asm-ppc64/page.h
index 20e0f19324e8..86219574c1a5 100644
--- a/include/asm-ppc64/page.h
+++ b/include/asm-ppc64/page.h
@@ -252,10 +252,19 @@ extern u64 ppc64_pft_size;		/* Log 2 of page table size */
 
 /*
  * This is the default if a program doesn't have a PT_GNU_STACK
- * program header entry.
+ * program header entry. The PPC64 ELF ABI has a non executable stack
+ * stack by default, so in the absense of a PT_GNU_STACK program header
+ * we turn execute permission off.
  */
-#define VM_STACK_DEFAULT_FLAGS  (VM_READ | VM_WRITE | VM_EXEC | \
-                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_STACK_DEFAULT_FLAGS32        (VM_READ | VM_WRITE | VM_EXEC | \
+                                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define VM_STACK_DEFAULT_FLAGS64        (VM_READ | VM_WRITE | \
+                                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define VM_STACK_DEFAULT_FLAGS \
+        (test_thread_flag(TIF_32BIT) ? \
+         VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
 
 #endif /* __KERNEL__ */
 #endif /* _PPC64_PAGE_H */
diff --git a/include/asm-ppc64/pgalloc.h b/include/asm-ppc64/pgalloc.h
index 16232d740173..4fc4b739b380 100644
--- a/include/asm-ppc64/pgalloc.h
+++ b/include/asm-ppc64/pgalloc.h
@@ -27,7 +27,7 @@ pgd_free(pgd_t *pgd)
         kmem_cache_free(zero_cache, pgd);
 }
 
-#define pgd_populate(MM, PGD, PMD)      pgd_set(PGD, PMD)
+#define pud_populate(MM, PUD, PMD)      pud_set(PUD, PMD)
 
 static inline pmd_t *
 pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
diff --git a/include/asm-ppc64/pgtable.h b/include/asm-ppc64/pgtable.h
index a26120517c54..b984e2747e0c 100644
--- a/include/asm-ppc64/pgtable.h
+++ b/include/asm-ppc64/pgtable.h
@@ -1,8 +1,6 @@
 #ifndef _PPC64_PGTABLE_H
 #define _PPC64_PGTABLE_H
 
-#include <asm-generic/4level-fixup.h>
-
 /*
  * This file contains the functions and defines necessary to modify and use
  * the ppc64 hashed page table.
@@ -17,6 +15,8 @@
 #include <asm/tlbflush.h>
 #endif /* __ASSEMBLY__ */
 
+#include <asm-generic/pgtable-nopud.h>
+
 /* PMD_SHIFT determines what a second-level page table entry can map */
 #define PMD_SHIFT       (PAGE_SHIFT + PAGE_SHIFT - 3)
 #define PMD_SIZE        (1UL << PMD_SHIFT)
@@ -228,12 +228,13 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm);
 #define pmd_page_kernel(pmd)    \
         (__bpn_to_ba(pmd_val(pmd) >> PMD_TO_PTEPAGE_SHIFT))
 #define pmd_page(pmd)           virt_to_page(pmd_page_kernel(pmd))
-#define pgd_set(pgdp, pmdp)     (pgd_val(*(pgdp)) = (__ba_to_bpn(pmdp)))
-#define pgd_none(pgd)           (!pgd_val(pgd))
-#define pgd_bad(pgd)            ((pgd_val(pgd)) == 0)
-#define pgd_present(pgd)        (pgd_val(pgd) != 0UL)
-#define pgd_clear(pgdp)         (pgd_val(*(pgdp)) = 0UL)
-#define pgd_page(pgd)           (__bpn_to_ba(pgd_val(pgd))) 
+
+#define pud_set(pudp, pmdp)     (pud_val(*(pudp)) = (__ba_to_bpn(pmdp)))
+#define pud_none(pud)           (!pud_val(pud))
+#define pud_bad(pud)            ((pud_val(pud)) == 0UL)
+#define pud_present(pud)        (pud_val(pud) != 0UL)
+#define pud_clear(pudp)         (pud_val(*(pudp)) = 0UL)
+#define pud_page(pud)           (__bpn_to_ba(pud_val(pud)))
 
 /* 
  * Find an entry in a page-table-directory.  We combine the address region 
@@ -245,12 +246,13 @@ void hugetlb_mm_free_pgd(struct mm_struct *mm);
 #define pgd_offset(mm, address)  ((mm)->pgd + pgd_index(address))
 
 /* Find an entry in the second-level page table.. */
-#define pmd_offset(dir,addr) \
-  ((pmd_t *) pgd_page(*(dir)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
+#define pmd_offset(pudp,addr) \
+  ((pmd_t *) pud_page(*(pudp)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
 
 /* Find an entry in the third-level page table.. */
 #define pte_offset_kernel(dir,addr) \
-  ((pte_t *) pmd_page_kernel(*(dir)) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
+  ((pte_t *) pmd_page_kernel(*(dir)) \
+ + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 
 #define pte_offset_map(dir,addr)        pte_offset_kernel((dir), (addr))
 #define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
@@ -582,19 +584,22 @@ extern long native_hpte_insert(unsigned long hpte_group, unsigned long va,
 static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea)
 {
         pgd_t *pg;
+        pud_t *pu;
         pmd_t *pm;
         pte_t *pt = NULL;
         pte_t pte;
 
         pg = pgdir + pgd_index(ea);
         if (!pgd_none(*pg)) {
-
-                pm = pmd_offset(pg, ea);
-                if (pmd_present(*pm)) { 
-                        pt = pte_offset_kernel(pm, ea);
-                        pte = *pt;
-                        if (!pte_present(pte))
-                                pt = NULL;
+                pu = pud_offset(pg, ea);
+                if (!pud_none(*pu)) {
+                        pm = pmd_offset(pu, ea);
+                        if (pmd_present(*pm)) {
+                                pt = pte_offset_kernel(pm, ea);
+                                pte = *pt;
+                                if (!pte_present(pte))
+                                        pt = NULL;
+                        }
                 }
         }
 
diff --git a/include/asm-ppc64/signal.h b/include/asm-ppc64/signal.h
index fe5401adb41b..a2d7bbb4befd 100644
--- a/include/asm-ppc64/signal.h
+++ b/include/asm-ppc64/signal.h
@@ -96,19 +96,6 @@ typedef struct {
 
 #define MINSIGSTKSZ     2048
 #define SIGSTKSZ        8192
-#ifdef __KERNEL__
-
-/*
- * These values of sa_flags are used only by the kernel as part of the
- * irq handling routines.
- *
- * SA_INTERRUPT is also used by the irq handling routines.
- * SA_SHIRQ is for shared interrupt support on PCI and EISA.
- */
-#define SA_PROBE                SA_ONESHOT
-#define SA_SAMPLE_RANDOM        SA_RESTART
-#define SA_SHIRQ                0x04000000
-#endif
 
 #define SIG_BLOCK          0    /* for blocking signals */
 #define SIG_UNBLOCK        1    /* for unblocking signals */
diff --git a/include/asm-ppc64/spinlock.h b/include/asm-ppc64/spinlock.h
index a9b2a1162cf7..acd11564dd75 100644
--- a/include/asm-ppc64/spinlock.h
+++ b/include/asm-ppc64/spinlock.h
@@ -110,7 +110,7 @@ static void __inline__ _raw_spin_lock(spinlock_t *lock)
                         HMT_low();
                         if (SHARED_PROCESSOR)
                                 __spin_yield(lock);
-                } while (likely(lock->lock != 0));
+                } while (unlikely(lock->lock != 0));
                 HMT_medium();
         }
 }
@@ -128,7 +128,7 @@ static void __inline__ _raw_spin_lock_flags(spinlock_t *lock, unsigned long flag
                         HMT_low();
                         if (SHARED_PROCESSOR)
                                 __spin_yield(lock);
-                } while (likely(lock->lock != 0));
+                } while (unlikely(lock->lock != 0));
                 HMT_medium();
                 local_irq_restore(flags_dis);
         }
@@ -194,7 +194,7 @@ static void __inline__ _raw_read_lock(rwlock_t *rw)
                         HMT_low();
                         if (SHARED_PROCESSOR)
                                 __rw_yield(rw);
-                } while (likely(rw->lock < 0));
+                } while (unlikely(rw->lock < 0));
                 HMT_medium();
         }
 }
@@ -251,7 +251,7 @@ static void __inline__ _raw_write_lock(rwlock_t *rw)
                         HMT_low();
                         if (SHARED_PROCESSOR)
                                 __rw_yield(rw);
-                } while (likely(rw->lock != 0));
+                } while (unlikely(rw->lock != 0));
                 HMT_medium();
         }
 }