diff options
| -rw-r--r-- | drivers/firmware/efivars.c | 34 | ||||
| -rw-r--r-- | include/linux/efi.h | 37 |
2 files changed, 44 insertions, 27 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index b10b7d7bd7de..ff0c373e3bbf 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -89,28 +89,6 @@ MODULE_DESCRIPTION("sysfs interface to EFI Variables"); MODULE_LICENSE("GPL"); MODULE_VERSION(EFIVARS_VERSION); -struct efivar_operations { - efi_get_variable_t *get_variable; - efi_get_next_variable_t *get_next_variable; - efi_set_variable_t *set_variable; -}; - -struct efivars { - /* - * ->lock protects two things: - * 1) ->list - adds, removals, reads, writes - * 2) ops.[gs]et_variable() calls. - * It must not be held when creating sysfs entries or calling kmalloc. - * ops.get_next_variable() is only called from register_efivars(), - * which is protected by the BKL, so that path is safe. - */ - spinlock_t lock; - struct list_head list; - struct kset *kset; - struct bin_attribute *new_var, *del_var; - const struct efivar_operations *ops; -}; - /* * The maximum size of VariableName + Data = 1024 * Therefore, it's reasonable to save that much @@ -706,7 +684,7 @@ out_free: return error; } -static void unregister_efivars(struct efivars *efivars) +void unregister_efivars(struct efivars *efivars) { struct efivar_entry *entry, *n; @@ -724,10 +702,11 @@ static void unregister_efivars(struct efivars *efivars) kfree(efivars->del_var); kset_unregister(efivars->kset); } +EXPORT_SYMBOL_GPL(unregister_efivars); -static int register_efivars(struct efivars *efivars, - const struct efivar_operations *ops, - struct kobject *parent_kobj) +int register_efivars(struct efivars *efivars, + const struct efivar_operations *ops, + struct kobject *parent_kobj) { efi_status_t status = EFI_NOT_FOUND; efi_guid_t vendor_guid; @@ -789,6 +768,7 @@ out: return error; } +EXPORT_SYMBOL_GPL(register_efivars); static struct efivars __efivars; static struct efivar_operations ops; @@ -810,7 +790,7 @@ efivars_init(void) EFIVARS_DATE); if (!efi_enabled) - return -ENODEV; + return 0; /* For now we'll register the efi directory at /sys/firmware/efi */ efi_kobj = kobject_create_and_add("efi", firmware_kobj); diff --git a/include/linux/efi.h b/include/linux/efi.h index fb737bc19a8c..33fa1203024e 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -397,4 +397,41 @@ static inline void memrange_efi_to_native(u64 *addr, u64 *npages) *addr &= PAGE_MASK; } +#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) +/* + * EFI Variable support. + * + * Different firmware drivers can expose their EFI-like variables using + * the following. + */ + +struct efivar_operations { + efi_get_variable_t *get_variable; + efi_get_next_variable_t *get_next_variable; + efi_set_variable_t *set_variable; +}; + +struct efivars { + /* + * ->lock protects two things: + * 1) ->list - adds, removals, reads, writes + * 2) ops.[gs]et_variable() calls. + * It must not be held when creating sysfs entries or calling kmalloc. + * ops.get_next_variable() is only called from register_efivars(), + * which is protected by the BKL, so that path is safe. + */ + spinlock_t lock; + struct list_head list; + struct kset *kset; + struct bin_attribute *new_var, *del_var; + const struct efivar_operations *ops; +}; + +int register_efivars(struct efivars *efivars, + const struct efivar_operations *ops, + struct kobject *parent_kobj); +void unregister_efivars(struct efivars *efivars); + +#endif /* CONFIG_EFI_VARS */ + #endif /* _LINUX_EFI_H */ |