6 files changed, 107 insertions, 30 deletions

diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
index 39c8bc1a006a..d74265cffd86 100644
--- a/arch/arm/include/asm/ftrace.h
+++ b/arch/arm/include/asm/ftrace.h
@@ -11,4 +11,38 @@ extern void mcount(void);
 
 #endif
 
+#ifndef __ASSEMBLY__
+
+#if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
+/*
+ * return_address uses walk_stackframe to do it's work.  If both
+ * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
+ * information.  For this to work in the function tracer many functions would
+ * have to be marked with __notrace.  So for now just depend on
+ * !CONFIG_ARM_UNWIND.
+ */
+
+void *return_address(unsigned int);
+
+#else
+
+extern inline void *return_address(unsigned int level)
+{
+        return NULL;
+}
+
+#endif
+
+#define HAVE_ARCH_CALLER_ADDR
+
+#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
+#define CALLER_ADDR1 ((unsigned long)return_address(1))
+#define CALLER_ADDR2 ((unsigned long)return_address(2))
+#define CALLER_ADDR3 ((unsigned long)return_address(3))
+#define CALLER_ADDR4 ((unsigned long)return_address(4))
+#define CALLER_ADDR5 ((unsigned long)return_address(5))
+#define CALLER_ADDR6 ((unsigned long)return_address(6))
+
+#endif /* ifndef __ASSEMBLY__ */
+
 #endif /* _ASM_ARM_FTRACE */
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index be962c1349c4..9c746af1bf6e 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -12,7 +12,7 @@
 
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT              12
-#define PAGE_SIZE               (1UL << PAGE_SHIFT)
+#define PAGE_SIZE               (_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK               (~(PAGE_SIZE-1))
 
 #ifndef __ASSEMBLY__
diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h
index 3dcd64bf1824..b12cc98bbe04 100644
--- a/arch/arm/include/asm/pgalloc.h
+++ b/arch/arm/include/asm/pgalloc.h
@@ -36,6 +36,8 @@ extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);
 #define pgd_alloc(mm)                   get_pgd_slow(mm)
 #define pgd_free(mm, pgd)               free_pgd_slow(mm, pgd)
 
+#define PGALLOC_GFP     (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
+
 /*
  * Allocate one PTE table.
  *
@@ -57,7 +59,7 @@ pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
 {
         pte_t *pte;
 
-        pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+        pte = (pte_t *)__get_free_page(PGALLOC_GFP);
         if (pte) {
                 clean_dcache_area(pte, sizeof(pte_t) * PTRS_PER_PTE);
                 pte += PTRS_PER_PTE;
@@ -71,10 +73,16 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
         struct page *pte;
 
-        pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+#ifdef CONFIG_HIGHPTE
+        pte = alloc_pages(PGALLOC_GFP | __GFP_HIGHMEM, 0);
+#else
+        pte = alloc_pages(PGALLOC_GFP, 0);
+#endif
         if (pte) {
-                void *page = page_address(pte);
-                clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE);
+                if (!PageHighMem(pte)) {
+                        void *page = page_address(pte);
+                        clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE);
+                }
                 pgtable_page_ctor(pte);
         }
 
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 1cd2d6416bda..201ccaa11f61 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -162,10 +162,8 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
  * entries are stored 1024 bytes below.
  */
 #define L_PTE_PRESENT           (1 << 0)
-#define L_PTE_FILE              (1 << 1)        /* only when !PRESENT */
 #define L_PTE_YOUNG             (1 << 1)
-#define L_PTE_BUFFERABLE        (1 << 2)        /* obsolete, matches PTE */
-#define L_PTE_CACHEABLE         (1 << 3)        /* obsolete, matches PTE */
+#define L_PTE_FILE              (1 << 2)        /* only when !PRESENT */
 #define L_PTE_DIRTY             (1 << 6)
 #define L_PTE_WRITE             (1 << 7)
 #define L_PTE_USER              (1 << 8)
@@ -264,10 +262,19 @@ extern struct page *empty_zero_page;
 #define pte_clear(mm,addr,ptep) set_pte_ext(ptep, __pte(0), 0)
 #define pte_page(pte)           (pfn_to_page(pte_pfn(pte)))
 #define pte_offset_kernel(dir,addr)     (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_offset_map(dir,addr)        (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_offset_map_nested(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
+
+#define pte_offset_map(dir,addr)        (__pte_map(dir, KM_PTE0) + __pte_index(addr))
+#define pte_offset_map_nested(dir,addr) (__pte_map(dir, KM_PTE1) + __pte_index(addr))
+#define pte_unmap(pte)                  __pte_unmap(pte, KM_PTE0)
+#define pte_unmap_nested(pte)           __pte_unmap(pte, KM_PTE1)
+
+#ifndef CONFIG_HIGHPTE
+#define __pte_map(dir,km)       pmd_page_vaddr(*(dir))
+#define __pte_unmap(pte,km)     do { } while (0)
+#else
+#define __pte_map(dir,km)       ((pte_t *)kmap_atomic(pmd_page(*(dir)), km) + PTRS_PER_PTE)
+#define __pte_unmap(pte,km)     kunmap_atomic((pte - PTRS_PER_PTE), km)
+#endif
 
 #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext)
 
@@ -285,15 +292,6 @@ extern struct page *empty_zero_page;
 #define pte_young(pte)          (pte_val(pte) & L_PTE_YOUNG)
 #define pte_special(pte)        (0)
 
-/*
- * The following only works if pte_present() is not true.
- */
-#define pte_file(pte)           (pte_val(pte) & L_PTE_FILE)
-#define pte_to_pgoff(x)         (pte_val(x) >> 2)
-#define pgoff_to_pte(x)         __pte(((x) << 2) | L_PTE_FILE)
-
-#define PTE_FILE_MAX_BITS       30
-
 #define PTE_BIT_FUNC(fn,op) \
 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
 
@@ -384,16 +382,50 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
-/* Encode and decode a swap entry.
+/*
+ * Encode and decode a swap entry.  Swap entries are stored in the Linux
+ * page tables as follows:
+ *
+ *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ *   <--------------- offset --------------------> <- type --> 0 0 0
  *
- * We support up to 32GB of swap on 4k machines
+ * This gives us up to 63 swap files and 32GB per swap file.  Note that
+ * the offset field is always non-zero.
  */
-#define __swp_type(x)           (((x).val >> 2) & 0x7f)
-#define __swp_offset(x)         ((x).val >> 9)
-#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << 2) | ((offset) << 9) })
+#define __SWP_TYPE_SHIFT        3
+#define __SWP_TYPE_BITS         6
+#define __SWP_TYPE_MASK         ((1 << __SWP_TYPE_BITS) - 1)
+#define __SWP_OFFSET_SHIFT      (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
+
+#define __swp_type(x)           (((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
+#define __swp_offset(x)         ((x).val >> __SWP_OFFSET_SHIFT)
+#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) | ((offset) << __SWP_OFFSET_SHIFT) })
+
 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
 #define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
 
+/*
+ * It is an error for the kernel to have more swap files than we can
+ * encode in the PTEs.  This ensures that we know when MAX_SWAPFILES
+ * is increased beyond what we presently support.
+ */
+#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
+
+/*
+ * Encode and decode a file entry.  File entries are stored in the Linux
+ * page tables as follows:
+ *
+ *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ *   <----------------------- offset ------------------------> 1 0 0
+ */
+#define pte_file(pte)           (pte_val(pte) & L_PTE_FILE)
+#define pte_to_pgoff(x)         (pte_val(x) >> 3)
+#define pgoff_to_pte(x)         __pte(((x) << 3) | L_PTE_FILE)
+
+#define PTE_FILE_MAX_BITS       29
+
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 /* FIXME: this is not correct */
 #define kern_addr_valid(addr)   (1)
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h
index 4f8848260ee2..e20d80539b42 100644
--- a/arch/arm/include/asm/thread_info.h
+++ b/arch/arm/include/asm/thread_info.h
@@ -73,7 +73,7 @@ struct thread_info {
         .task           = &tsk,                                         \
         .exec_domain    = &default_exec_domain,                         \
         .flags          = 0,                                            \
-        .preempt_count  = 1,                                            \
+        .preempt_count  = INIT_PREEMPT_COUNT,                           \
         .addr_limit     = KERNEL_DS,                                    \
         .cpu_domain     = domain_val(DOMAIN_USER, DOMAIN_MANAGER) |     \
                           domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |   \
@@ -140,6 +140,7 @@ extern void vfp_sync_state(struct thread_info *thread);
 #define TIF_USING_IWMMXT        17
 #define TIF_MEMDIE              18
 #define TIF_FREEZE              19
+#define TIF_RESTORE_SIGMASK     20
 
 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
@@ -147,6 +148,7 @@ extern void vfp_sync_state(struct thread_info *thread);
 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
 #define _TIF_USING_IWMMXT       (1 << TIF_USING_IWMMXT)
 #define _TIF_FREEZE             (1 << TIF_FREEZE)
+#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
 
 /*
  * Change these and you break ASM code in entry-common.S
diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index 0e97b8cb77d5..9122c9ee18fb 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -360,8 +360,8 @@
 #define __NR_readlinkat                 (__NR_SYSCALL_BASE+332)
 #define __NR_fchmodat                   (__NR_SYSCALL_BASE+333)
 #define __NR_faccessat                  (__NR_SYSCALL_BASE+334)
-                                        /* 335 for pselect6 */
-                                        /* 336 for ppoll */
+#define __NR_pselect6                   (__NR_SYSCALL_BASE+335)
+#define __NR_ppoll                      (__NR_SYSCALL_BASE+336)
 #define __NR_unshare                    (__NR_SYSCALL_BASE+337)
 #define __NR_set_robust_list            (__NR_SYSCALL_BASE+338)
 #define __NR_get_robust_list            (__NR_SYSCALL_BASE+339)
@@ -372,7 +372,7 @@
 #define __NR_vmsplice                   (__NR_SYSCALL_BASE+343)
 #define __NR_move_pages                 (__NR_SYSCALL_BASE+344)
 #define __NR_getcpu                     (__NR_SYSCALL_BASE+345)
-                                        /* 346 for epoll_pwait */
+#define __NR_epoll_pwait                (__NR_SYSCALL_BASE+346)
 #define __NR_kexec_load                 (__NR_SYSCALL_BASE+347)
 #define __NR_utimensat                  (__NR_SYSCALL_BASE+348)
 #define __NR_signalfd                   (__NR_SYSCALL_BASE+349)
@@ -432,6 +432,7 @@
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_SYS_RT_SIGACTION
+#define __ARCH_WANT_SYS_RT_SIGSUSPEND
 
 #if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
 #define __ARCH_WANT_SYS_TIME