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SubjectRe: 2.6.20-rc7: known regressions
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Le samedi 03 février 2007 à 10:58 +0100, Andi Kleen a écrit :
> Define a efilinkage macro then that expands to nothing on ia64
>
> Probably asmlinkage would work already, syscall_linkage as used on ia64 doesn't
> seem to affect function pointers.

And here it goes:

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>
---
diff --git a/include/linux/efi.h b/include/linux/efi.h
index f8ebd7c..596e806 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -157,22 +157,39 @@ 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,
+#ifdef CONFIG_X86_32
+#define efilinkage asmlinkage
+#else
+#define efilinkage
+#endif
+
+typedef efilinkage efi_status_t efi_get_time_t (efi_time_t *tm,
+ efi_time_cap_t *tc);
+typedef efilinkage efi_status_t efi_set_time_t (efi_time_t *tm);
+typedef efilinkage efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled,
+ efi_bool_t *pending,
+ efi_time_t *tm);
+typedef efilinkage efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled,
+ efi_time_t *tm);
+typedef efilinkage efi_status_t efi_get_variable_t (efi_char16_t *name,
+ efi_guid_t *vendor,
+ u32 *attr,
+ unsigned long *data_size,
+ void *data);
+typedef efilinkage efi_status_t efi_get_next_variable_t (unsigned long *name_sz,
+ efi_char16_t *name,
+ efi_guid_t *vendor);
+typedef efilinkage 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 efilinkage efi_status_t efi_get_next_high_mono_count_t (u32 *count);
+typedef efilinkage void efi_reset_system_t (int reset_type,
+ efi_status_t status,
+ unsigned long data_size,
+ efi_char16_t *data);
+typedef efilinkage 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);


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