kernel/revert-efi-rtclock.patch

commit d80d983c0fbfe0b0f6bd83c4279e1077c31e7fe4
Author: Josh Boyer <jwboyer@redhat.com>
Date:   Fri Jan 20 10:12:15 2012 -0500

    Revert "x86: Serialize EFI time accesses on rtc_lock"
    
    This reverts commit ef68c8f87ed13f65df867dddf36c0e185b27b942.

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 4cf9bd0..457e37a 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -90,50 +90,26 @@ early_param("add_efi_memmap", setup_add_efi_memmap);
 
 static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
 {
-	unsigned long flags;
-	efi_status_t status;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	status = efi_call_virt2(get_time, tm, tc);
-	spin_unlock_irqrestore(&rtc_lock, flags);
-	return status;
+	return efi_call_virt2(get_time, tm, tc);
 }
 
 static efi_status_t virt_efi_set_time(efi_time_t *tm)
 {
-	unsigned long flags;
-	efi_status_t status;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	status = efi_call_virt1(set_time, tm);
-	spin_unlock_irqrestore(&rtc_lock, flags);
-	return status;
+	return efi_call_virt1(set_time, tm);
 }
 
 static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
 					     efi_bool_t *pending,
 					     efi_time_t *tm)
 {
-	unsigned long flags;
-	efi_status_t status;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	status = efi_call_virt3(get_wakeup_time,
-				enabled, pending, tm);
-	spin_unlock_irqrestore(&rtc_lock, flags);
-	return status;
+	return efi_call_virt3(get_wakeup_time,
+			      enabled, pending, tm);
 }
 
 static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
 {
-	unsigned long flags;
-	efi_status_t status;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	status = efi_call_virt2(set_wakeup_time,
-				enabled, tm);
-	spin_unlock_irqrestore(&rtc_lock, flags);
-	return status;
+	return efi_call_virt2(set_wakeup_time,
+			      enabled, tm);
 }
 
 static efi_status_t virt_efi_get_variable(efi_char16_t *name,
@@ -233,15 +209,12 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
 static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
 					     efi_time_cap_t *tc)
 {
-	unsigned long flags;
 	efi_status_t status;
 
-	spin_lock_irqsave(&rtc_lock, flags);
 	efi_call_phys_prelog();
 	status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm),
 				virt_to_phys(tc));
 	efi_call_phys_epilog();
-	spin_unlock_irqrestore(&rtc_lock, flags);
 	return status;
 }