Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip into trace/tip/tracing/core-6

Conflicts:
	include/trace/ftrace.h
	kernel/trace/trace_kprobe.c

Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

4 files changed, 16 insertions, 31 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 8d90564c2bcf..e6d8ab5cfa9d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -44,6 +44,7 @@ config SUPERH32
         select HAVE_FUNCTION_GRAPH_TRACER
         select HAVE_ARCH_KGDB
         select HAVE_HW_BREAKPOINT
+        select HAVE_MIXED_BREAKPOINTS_REGS
         select PERF_EVENTS if HAVE_HW_BREAKPOINT
         select ARCH_HIBERNATION_POSSIBLE if MMU
 
diff --git a/arch/sh/include/asm/hw_breakpoint.h b/arch/sh/include/asm/hw_breakpoint.h
index 965dd780d51b..e14cad96798f 100644
--- a/arch/sh/include/asm/hw_breakpoint.h
+++ b/arch/sh/include/asm/hw_breakpoint.h
@@ -46,10 +46,14 @@ struct pmu;
 /* Maximum number of UBC channels */
 #define HBP_NUM         2
 
+static inline int hw_breakpoint_slots(int type)
+{
+        return HBP_NUM;
+}
+
 /* arch/sh/kernel/hw_breakpoint.c */
-extern int arch_check_va_in_userspace(unsigned long va, u16 hbp_len);
-extern int arch_validate_hwbkpt_settings(struct perf_event *bp,
-                                         struct task_struct *tsk);
+extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
                                            unsigned long val, void *data);
 
diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c
index 675eea7785d9..1f2cf6229862 100644
--- a/arch/sh/kernel/hw_breakpoint.c
+++ b/arch/sh/kernel/hw_breakpoint.c
@@ -120,25 +120,16 @@ static int get_hbp_len(u16 hbp_len)
 }
 
 /*
- * Check for virtual address in user space.
- */
-int arch_check_va_in_userspace(unsigned long va, u16 hbp_len)
-{
-        unsigned int len;
-
-        len = get_hbp_len(hbp_len);
-
-        return (va <= TASK_SIZE - len);
-}
-
-/*
  * Check for virtual address in kernel space.
  */
-static int arch_check_va_in_kernelspace(unsigned long va, u8 hbp_len)
+int arch_check_bp_in_kernelspace(struct perf_event *bp)
 {
         unsigned int len;
+        unsigned long va;
+        struct arch_hw_breakpoint *info = counter_arch_bp(bp);
 
-        len = get_hbp_len(hbp_len);
+        va = info->address;
+        len = get_hbp_len(info->len);
 
         return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
 }
@@ -226,8 +217,7 @@ static int arch_build_bp_info(struct perf_event *bp)
 /*
  * Validate the arch-specific HW Breakpoint register settings
  */
-int arch_validate_hwbkpt_settings(struct perf_event *bp,
-                                  struct task_struct *tsk)
+int arch_validate_hwbkpt_settings(struct perf_event *bp)
 {
         struct arch_hw_breakpoint *info = counter_arch_bp(bp);
         unsigned int align;
@@ -270,15 +260,6 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp,
         if (info->address & align)
                 return -EINVAL;
 
-        /* Check that the virtual address is in the proper range */
-        if (tsk) {
-                if (!arch_check_va_in_userspace(info->address, info->len))
-                        return -EFAULT;
-        } else {
-                if (!arch_check_va_in_kernelspace(info->address, info->len))
-                        return -EFAULT;
-        }
-
         return 0;
 }
 
@@ -363,8 +344,7 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
                 perf_bp_event(bp, args->regs);
 
                 /* Deliver the signal to userspace */
-                if (arch_check_va_in_userspace(bp->attr.bp_addr,
-                                               bp->attr.bp_len)) {
+                if (!arch_check_bp_in_kernelspace(bp)) {
                         siginfo_t info;
 
                         info.si_signo = args->signr;
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 7759a9a93211..d4104ce9fe53 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -85,7 +85,7 @@ static int set_single_step(struct task_struct *tsk, unsigned long addr)
 
         bp = thread->ptrace_bps[0];
         if (!bp) {
-                hw_breakpoint_init(&attr);
+                ptrace_breakpoint_init(&attr);
 
                 attr.bp_addr = addr;
                 attr.bp_len = HW_BREAKPOINT_LEN_2;