Merge branch 'misc' into for-linus

Conflicts:
	arch/arm/kernel/ptrace.c

6 files changed, 119 insertions, 65 deletions

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index d5d8d5c72682..004c1bc95d2b 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -101,7 +101,7 @@ struct cpu_cache_fns {
         void (*flush_user_range)(unsigned long, unsigned long, unsigned int);
 
         void (*coherent_kern_range)(unsigned long, unsigned long);
-        void (*coherent_user_range)(unsigned long, unsigned long);
+        int  (*coherent_user_range)(unsigned long, unsigned long);
         void (*flush_kern_dcache_area)(void *, size_t);
 
         void (*dma_map_area)(const void *, size_t, int);
@@ -142,7 +142,7 @@ extern void __cpuc_flush_kern_all(void);
 extern void __cpuc_flush_user_all(void);
 extern void __cpuc_flush_user_range(unsigned long, unsigned long, unsigned int);
 extern void __cpuc_coherent_kern_range(unsigned long, unsigned long);
-extern void __cpuc_coherent_user_range(unsigned long, unsigned long);
+extern int  __cpuc_coherent_user_range(unsigned long, unsigned long);
 extern void __cpuc_flush_dcache_area(void *, size_t);
 
 /*
@@ -249,7 +249,7 @@ extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr
  * Harvard caches are synchronised for the user space address range.
  * This is used for the ARM private sys_cacheflush system call.
  */
-#define flush_cache_user_range(vma,start,end) \
+#define flush_cache_user_range(start,end) \
         __cpuc_coherent_user_range((start) & PAGE_MASK, PAGE_ALIGN(end))
 
 /*
diff --git a/arch/arm/include/asm/cmpxchg.h b/arch/arm/include/asm/cmpxchg.h
index d41d7cbf0ada..7eb18c1d8d6c 100644
--- a/arch/arm/include/asm/cmpxchg.h
+++ b/arch/arm/include/asm/cmpxchg.h
@@ -229,66 +229,19 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
                                        (unsigned long)(n),              \
                                        sizeof(*(ptr))))
 
-#ifndef CONFIG_CPU_V6   /* min ARCH >= ARMv6K */
-
-/*
- * Note : ARMv7-M (currently unsupported by Linux) does not support
- * ldrexd/strexd. If ARMv7-M is ever supported by the Linux kernel, it should
- * not be allowed to use __cmpxchg64.
- */
-static inline unsigned long long __cmpxchg64(volatile void *ptr,
-                                             unsigned long long old,
-                                             unsigned long long new)
-{
-        register unsigned long long oldval asm("r0");
-        register unsigned long long __old asm("r2") = old;
-        register unsigned long long __new asm("r4") = new;
-        unsigned long res;
-
-        do {
-                asm volatile(
-                "       @ __cmpxchg8\n"
-                "       ldrexd  %1, %H1, [%2]\n"
-                "       mov     %0, #0\n"
-                "       teq     %1, %3\n"
-                "       teqeq   %H1, %H3\n"
-                "       strexdeq %0, %4, %H4, [%2]\n"
-                        : "=&r" (res), "=&r" (oldval)
-                        : "r" (ptr), "Ir" (__old), "r" (__new)
-                        : "memory", "cc");
-        } while (res);
-
-        return oldval;
-}
-
-static inline unsigned long long __cmpxchg64_mb(volatile void *ptr,
-                                                unsigned long long old,
-                                                unsigned long long new)
-{
-        unsigned long long ret;
-
-        smp_mb();
-        ret = __cmpxchg64(ptr, old, new);
-        smp_mb();
-
-        return ret;
-}
-
-#define cmpxchg64(ptr,o,n)                                              \
-        ((__typeof__(*(ptr)))__cmpxchg64_mb((ptr),                      \
-                                            (unsigned long long)(o),    \
-                                            (unsigned long long)(n)))
-
-#define cmpxchg64_local(ptr,o,n)                                        \
-        ((__typeof__(*(ptr)))__cmpxchg64((ptr),                         \
-                                         (unsigned long long)(o),       \
-                                         (unsigned long long)(n)))
-
-#else /* min ARCH = ARMv6 */
-
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-#endif
+#define cmpxchg64(ptr, o, n)                                            \
+        ((__typeof__(*(ptr)))atomic64_cmpxchg(container_of((ptr),       \
+                                                atomic64_t,             \
+                                                counter),               \
+                                              (unsigned long)(o),       \
+                                              (unsigned long)(n)))
+
+#define cmpxchg64_local(ptr, o, n)                                      \
+        ((__typeof__(*(ptr)))local64_cmpxchg(container_of((ptr),        \
+                                                local64_t,              \
+                                                a),                     \
+                                             (unsigned long)(o),        \
+                                             (unsigned long)(n)))
 
 #endif  /* __LINUX_ARM_ARCH__ >= 6 */
 
diff --git a/arch/arm/include/asm/mach/time.h b/arch/arm/include/asm/mach/time.h
index f73c908b7fa0..6ca945f534ab 100644
--- a/arch/arm/include/asm/mach/time.h
+++ b/arch/arm/include/asm/mach/time.h
@@ -42,4 +42,9 @@ struct sys_timer {
 
 extern void timer_tick(void);
 
+struct timespec;
+typedef void (*clock_access_fn)(struct timespec *);
+extern int register_persistent_clock(clock_access_fn read_boot,
+                                     clock_access_fn read_persistent);
+
 #endif
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 759af70f9a0a..b24903549d1c 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -69,8 +69,6 @@
  */
 #define L_PTE_PRESENT           (_AT(pteval_t, 3) << 0)         /* Valid */
 #define L_PTE_FILE              (_AT(pteval_t, 1) << 2)         /* only when !PRESENT */
-#define L_PTE_BUFFERABLE        (_AT(pteval_t, 1) << 2)         /* AttrIndx[0] */
-#define L_PTE_CACHEABLE         (_AT(pteval_t, 1) << 3)         /* AttrIndx[1] */
 #define L_PTE_USER              (_AT(pteval_t, 1) << 6)         /* AP[1] */
 #define L_PTE_RDONLY            (_AT(pteval_t, 1) << 7)         /* AP[2] */
 #define L_PTE_SHARED            (_AT(pteval_t, 3) << 8)         /* SH[1:0], inner shareable */
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 451808ba1211..355ece523f41 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -249,6 +249,11 @@ static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
         return regs->ARM_sp;
 }
 
+static inline unsigned long user_stack_pointer(struct pt_regs *regs)
+{
+        return regs->ARM_sp;
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h
new file mode 100644
index 000000000000..c334a23ddf75
--- /dev/null
+++ b/arch/arm/include/asm/syscall.h
@@ -0,0 +1,93 @@
+/*
+ * Access to user system call parameters and results
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_ARM_SYSCALL_H
+#define _ASM_ARM_SYSCALL_H
+
+#include <linux/err.h>
+
+extern const unsigned long sys_call_table[];
+
+static inline int syscall_get_nr(struct task_struct *task,
+                                 struct pt_regs *regs)
+{
+        return task_thread_info(task)->syscall;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+                                    struct pt_regs *regs)
+{
+        regs->ARM_r0 = regs->ARM_ORIG_r0;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+                                     struct pt_regs *regs)
+{
+        unsigned long error = regs->ARM_r0;
+        return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+                                            struct pt_regs *regs)
+{
+        return regs->ARM_r0;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+                                            struct pt_regs *regs,
+                                            int error, long val)
+{
+        regs->ARM_r0 = (long) error ? error : val;
+}
+
+#define SYSCALL_MAX_ARGS 7
+
+static inline void syscall_get_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         unsigned long *args)
+{
+        if (i + n > SYSCALL_MAX_ARGS) {
+                unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i;
+                unsigned int n_bad = n + i - SYSCALL_MAX_ARGS;
+                pr_warning("%s called with max args %d, handling only %d\n",
+                           __func__, i + n, SYSCALL_MAX_ARGS);
+                memset(args_bad, 0, n_bad * sizeof(args[0]));
+                n = SYSCALL_MAX_ARGS - i;
+        }
+
+        if (i == 0) {
+                args[0] = regs->ARM_ORIG_r0;
+                args++;
+                i++;
+                n--;
+        }
+
+        memcpy(args, &regs->ARM_r0 + i, n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         const unsigned long *args)
+{
+        if (i + n > SYSCALL_MAX_ARGS) {
+                pr_warning("%s called with max args %d, handling only %d\n",
+                           __func__, i + n, SYSCALL_MAX_ARGS);
+                n = SYSCALL_MAX_ARGS - i;
+        }
+
+        if (i == 0) {
+                regs->ARM_ORIG_r0 = args[0];
+                args++;
+                i++;
+                n--;
+        }
+
+        memcpy(&regs->ARM_r0 + i, args, n * sizeof(args[0]));
+}
+
+#endif /* _ASM_ARM_SYSCALL_H */