5 files changed, 27 insertions, 9 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 55936f9cb251..87b77de03dd3 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -33,6 +33,7 @@
 #include <linux/vmalloc.h>
 #include <linux/swap.h>
 #include <linux/kmsg_dump.h>
+#include <linux/syscore_ops.h>
 
 #include <asm/page.h>
 #include <asm/uaccess.h>
@@ -1532,6 +1533,11 @@ int kernel_kexec(void)
                 local_irq_disable();
                 /* Suspend system devices */
                 error = sysdev_suspend(PMSG_FREEZE);
+                if (!error) {
+                        error = syscore_suspend();
+                        if (error)
+                                sysdev_resume();
+                }
                 if (error)
                         goto Enable_irqs;
         } else
@@ -1546,6 +1552,7 @@ int kernel_kexec(void)
 
 #ifdef CONFIG_KEXEC_JUMP
         if (kexec_image->preserve_context) {
+                syscore_resume();
                 sysdev_resume();
  Enable_irqs:
                 local_irq_enable();
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index aeabd26e3342..50aae660174d 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -273,8 +273,11 @@ static int create_image(int platform_mode)
         local_irq_disable();
 
         error = sysdev_suspend(PMSG_FREEZE);
-        if (!error)
+        if (!error) {
                 error = syscore_suspend();
+                if (error)
+                        sysdev_resume();
+        }
         if (error) {
                 printk(KERN_ERR "PM: Some system devices failed to power down, "
                         "aborting hibernation\n");
@@ -407,8 +410,11 @@ static int resume_target_kernel(bool platform_mode)
         local_irq_disable();
 
         error = sysdev_suspend(PMSG_QUIESCE);
-        if (!error)
+        if (!error) {
                 error = syscore_suspend();
+                if (error)
+                        sysdev_resume();
+        }
         if (error)
                 goto Enable_irqs;
 
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 2814c32aed51..8935369d503a 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -164,8 +164,11 @@ static int suspend_enter(suspend_state_t state)
         BUG_ON(!irqs_disabled());
 
         error = sysdev_suspend(PMSG_SUSPEND);
-        if (!error)
+        if (!error) {
                 error = syscore_suspend();
+                if (error)
+                        sysdev_resume();
+        }
         if (!error) {
                 if (!(suspend_test(TEST_CORE) || pm_wakeup_pending())) {
                         error = suspend_ops->enter(state);
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 61d7d59f4a1a..2ad39e556cb4 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -141,7 +141,7 @@ if FTRACE
 config FUNCTION_TRACER
         bool "Kernel Function Tracer"
         depends on HAVE_FUNCTION_TRACER
-        select FRAME_POINTER if !ARM_UNWIND && !S390
+        select FRAME_POINTER if !ARM_UNWIND && !S390 && !MICROBLAZE
         select KALLSYMS
         select GENERIC_TRACER
         select CONTEXT_SWITCH_TRACER
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index ee24fa1935ac..666880d051ef 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2413,14 +2413,16 @@ ftrace_regex_release(struct inode *inode, struct file *file, int enable)
                 ftrace_match_records(parser->buffer, parser->idx, enable);
         }
 
-        mutex_lock(&ftrace_lock);
-        if (ftrace_start_up && ftrace_enabled)
-                ftrace_run_update_code(FTRACE_ENABLE_CALLS);
-        mutex_unlock(&ftrace_lock);
-
         trace_parser_put(parser);
         kfree(iter);
 
+        if (file->f_mode & FMODE_WRITE) {
+                mutex_lock(&ftrace_lock);
+                if (ftrace_start_up && ftrace_enabled)
+                        ftrace_run_update_code(FTRACE_ENABLE_CALLS);
+                mutex_unlock(&ftrace_lock);
+        }
+
         mutex_unlock(&ftrace_regex_lock);
         return 0;
 }