ACPI: Print message before calling _PTS

Make acpi_sleep_prepare() static and cause it to print a message
specifying the ACPI system sleep state to be entered (helpful for
debugging the suspend/hibernation code).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 10db8991bd15..485de1347075 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -43,7 +43,7 @@ static int __init acpi_new_pts_ordering(char *str)
 __setup("acpi_new_pts_ordering", acpi_new_pts_ordering);
 #endif
 
-int acpi_sleep_prepare(u32 acpi_state)
+static int acpi_sleep_prepare(u32 acpi_state)
 {
 #ifdef CONFIG_ACPI_SLEEP
         /* do we have a wakeup address for S2 and S3? */
@@ -59,6 +59,8 @@ int acpi_sleep_prepare(u32 acpi_state)
         ACPI_FLUSH_CPU_CACHE();
         acpi_enable_wakeup_device_prep(acpi_state);
 #endif
+        printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
+                acpi_state);
         acpi_enter_sleep_state_prep(acpi_state);
         return 0;
 }