[PATCH x86 for review II] [34/39] i386: Use stack arguments for calling into EFI

[Andi Kleen <ak@suse.de>]

When calling into the EFI firmware, the parameters need to be passed on
the stack. The recent change to use -mregparm=3 breaks x86 EFI support.
This patch is needed to allow the new Intel-based Macs to suspend to ram
(efi.get_time is called during the suspend phase).

Signed-off-by: Frederic Riss <frederic.riss@gmail.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 include/linux/efi.h |   43 +++++++++++++++++++++++++++----------------
 1 file changed, 27 insertions(+), 16 deletions(-)

Index: linux/include/linux/efi.h
===================================================================
--- linux.orig/include/linux/efi.h
+++ linux/include/linux/efi.h
@@ -157,22 +157,33 @@ typedef struct {
 	unsigned long reset_system;
 } efi_runtime_services_t;
 
-typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
-typedef efi_status_t efi_set_time_t (efi_time_t *tm);
-typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
-					    efi_time_t *tm);
-typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
-typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
-					 unsigned long *data_size, void *data);
-typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
-					      efi_guid_t *vendor);
-typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 
-					 unsigned long attr, unsigned long data_size, 
-					 void *data);
-typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
-typedef void efi_reset_system_t (int reset_type, efi_status_t status,
-				 unsigned long data_size, efi_char16_t *data);
-typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
+typedef asmlinkage efi_status_t efi_get_time_t (efi_time_t *tm,
+						efi_time_cap_t *tc);
+typedef asmlinkage efi_status_t efi_set_time_t (efi_time_t *tm);
+typedef asmlinkage efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled,
+						       efi_bool_t *pending,
+						       efi_time_t *tm);
+typedef asmlinkage efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled,
+						       efi_time_t *tm);
+typedef asmlinkage efi_status_t efi_get_variable_t (efi_char16_t *name,
+						    efi_guid_t *vendor,
+						    u32 *attr,
+						    unsigned long *data_size,
+						    void *data);
+typedef asmlinkage efi_status_t efi_get_next_variable_t (unsigned long *name_sz,
+							 efi_char16_t *name,
+							 efi_guid_t *vendor);
+typedef asmlinkage efi_status_t efi_set_variable_t (efi_char16_t *name,
+						    efi_guid_t *vendor,
+						    unsigned long attr,
+						    unsigned long data_size,
+						    void *data);
+typedef asmlinkage efi_status_t efi_get_next_high_mono_count_t (u32 *count);
+typedef asmlinkage void efi_reset_system_t (int reset_type,
+					    efi_status_t status,
+					    unsigned long data_size,
+					    efi_char16_t *data);
+typedef asmlinkage efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 						unsigned long descriptor_size,
 						u32 descriptor_version,
 						efi_memory_desc_t *virtual_map);