i386: calling efi_get_time during suspend

From: Artiom Myaskouvskey <artiom.myaskouvskey@intel.com>

Function efi_get_time called not only during init kernel phase but also
during suspend (from get_cmos_time).

When it is called from get_cmos_time the corresponding runtime service
should be called in virtual and not in physical mode.

Signed-off-by: Artiom Myaskouvskey <artiom.myaskouvskey@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: "Narayanan, Chandramouli" <chandramouli.narayanan@intel.com>
Cc: "Jiossy, Rami" <rami.jiossy@intel.com>
Cc: "Satt, Shai" <shai.satt@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 arch/i386/kernel/efi.c |   17 ++++++++++++-----
 include/linux/efi.h    |    2 +-
 2 files changed, 13 insertions(+), 6 deletions(-)

Index: linux/arch/i386/kernel/efi.c
===================================================================
--- linux.orig/arch/i386/kernel/efi.c
+++ linux/arch/i386/kernel/efi.c
@@ -194,17 +194,24 @@ inline int efi_set_rtc_mmss(unsigned lon
 	return 0;
 }
 /*
- * This should only be used during kernel init and before runtime
- * services have been remapped, therefore, we'll need to call in physical
- * mode.  Note, this call isn't used later, so mark it __init.
+ * This is used during kernel init before runtime
+ * services have been remapped and also during suspend, therefore,
+ * we'll need to call both in physical and virtual modes.
  */
-inline unsigned long __init efi_get_time(void)
+inline unsigned long efi_get_time(void)
 {
 	efi_status_t status;
 	efi_time_t eft;
 	efi_time_cap_t cap;
 
-	status = phys_efi_get_time(&eft, &cap);
+	if (efi.get_time) {
+		/* if we are in virtual mode use remapped function */
+ 		status = efi.get_time(&eft, &cap);
+	} else {
+		/* we are in physical mode */
+		status = phys_efi_get_time(&eft, &cap);
+	}
+
 	if (status != EFI_SUCCESS)
 		printk("Oops: efitime: can't read time status: 0x%lx\n",status);
 
Index: linux/include/linux/efi.h
===================================================================
--- linux.orig/include/linux/efi.h
+++ linux/include/linux/efi.h
@@ -300,7 +300,7 @@ extern int efi_mem_attribute_range (unsi
 extern int __init efi_uart_console_only (void);
 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 					struct resource *data_resource);
-extern unsigned long __init efi_get_time(void);
+extern unsigned long efi_get_time(void);
 extern int __init efi_set_rtc_mmss(unsigned long nowtime);
 extern struct efi_memory_map memmap;