kexec jump: clean up #ifdef and comments

Move if (kexec_image->preserve_context) { ...  } into #ifdef
CONFIG_KEXEC_JUMP to make code looks cleaner.

Fix no longer correct comments of kernel_kexec().

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index cf3797b76786..bfbbd120623c 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1426,11 +1426,9 @@ static int __init crash_save_vmcoreinfo_init(void)
 
 module_init(crash_save_vmcoreinfo_init)
 
-/**
- *      kernel_kexec - reboot the system
- *
- *      Move into place and start executing a preloaded standalone
- *      executable.  If nothing was preloaded return an error.
+/*
+ * Move into place and start executing a preloaded standalone
+ * executable.  If nothing was preloaded return an error.
  */
 int kernel_kexec(void)
 {
@@ -1443,8 +1441,8 @@ int kernel_kexec(void)
                 goto Unlock;
         }
 
-        if (kexec_image->preserve_context) {
 #ifdef CONFIG_KEXEC_JUMP
+        if (kexec_image->preserve_context) {
                 mutex_lock(&pm_mutex);
                 pm_prepare_console();
                 error = freeze_processes();
@@ -1471,8 +1469,9 @@ int kernel_kexec(void)
                 if (error)
                         goto Enable_irqs;
                 save_processor_state();
+        } else
 #endif
-        } else {
+        {
                 blocking_notifier_call_chain(&reboot_notifier_list,
                                              SYS_RESTART, NULL);
                 system_state = SYSTEM_RESTART;
@@ -1484,8 +1483,8 @@ int kernel_kexec(void)
 
         machine_kexec(kexec_image);
 
-        if (kexec_image->preserve_context) {
 #ifdef CONFIG_KEXEC_JUMP
+        if (kexec_image->preserve_context) {
                 restore_processor_state();
                 device_power_up(PMSG_RESTORE);
  Enable_irqs:
@@ -1499,8 +1498,8 @@ int kernel_kexec(void)
  Restore_console:
                 pm_restore_console();
                 mutex_unlock(&pm_mutex);
-#endif
         }
+#endif
 
  Unlock:
         if (!xchg(&kexec_lock, 0))