From 244b2c5ca8b14627e4a17755e5922221e121c771 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:15:07 +0000
Subject: [PATCH] change system file
---
kernel/drivers/firmware/efi/efivars.c | 124 ++--------------------------------------
1 files changed, 8 insertions(+), 116 deletions(-)
diff --git a/kernel/drivers/firmware/efi/efivars.c b/kernel/drivers/firmware/efi/efivars.c
index 6529add..e6b16b3 100644
--- a/kernel/drivers/firmware/efi/efivars.c
+++ b/kernel/drivers/firmware/efi/efivars.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Originally from efivars.c,
*
@@ -6,63 +7,6 @@
*
* This code takes all variables accessible from EFI runtime and
* exports them via sysfs
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Changelog:
- *
- * 17 May 2004 - Matt Domsch <Matt_Domsch@dell.com>
- * remove check for efi_enabled in exit
- * add MODULE_VERSION
- *
- * 26 Apr 2004 - Matt Domsch <Matt_Domsch@dell.com>
- * minor bug fixes
- *
- * 21 Apr 2004 - Matt Tolentino <matthew.e.tolentino@intel.com)
- * converted driver to export variable information via sysfs
- * and moved to drivers/firmware directory
- * bumped revision number to v0.07 to reflect conversion & move
- *
- * 10 Dec 2002 - Matt Domsch <Matt_Domsch@dell.com>
- * fix locking per Peter Chubb's findings
- *
- * 25 Mar 2002 - Matt Domsch <Matt_Domsch@dell.com>
- * move uuid_unparse() to include/asm-ia64/efi.h:efi_guid_to_str()
- *
- * 12 Feb 2002 - Matt Domsch <Matt_Domsch@dell.com>
- * use list_for_each_safe when deleting vars.
- * remove ifdef CONFIG_SMP around include <linux/smp.h>
- * v0.04 release to linux-ia64@linuxia64.org
- *
- * 20 April 2001 - Matt Domsch <Matt_Domsch@dell.com>
- * Moved vars from /proc/efi to /proc/efi/vars, and made
- * efi.c own the /proc/efi directory.
- * v0.03 release to linux-ia64@linuxia64.org
- *
- * 26 March 2001 - Matt Domsch <Matt_Domsch@dell.com>
- * At the request of Stephane, moved ownership of /proc/efi
- * to efi.c, and now efivars lives under /proc/efi/vars.
- *
- * 12 March 2001 - Matt Domsch <Matt_Domsch@dell.com>
- * Feedback received from Stephane Eranian incorporated.
- * efivar_write() checks copy_from_user() return value.
- * efivar_read/write() returns proper errno.
- * v0.02 release to linux-ia64@linuxia64.org
- *
- * 26 February 2001 - Matt Domsch <Matt_Domsch@dell.com>
- * v0.01 release to linux-ia64@linuxia64.org
*/
#include <linux/efi.h>
@@ -78,10 +22,8 @@
MODULE_DESCRIPTION("sysfs interface to EFI Variables");
MODULE_LICENSE("GPL");
MODULE_VERSION(EFIVARS_VERSION);
-MODULE_ALIAS("platform:efivars");
-LIST_HEAD(efivar_sysfs_list);
-EXPORT_SYMBOL_GPL(efivar_sysfs_list);
+static LIST_HEAD(efivar_sysfs_list);
static struct kset *efivars_kset;
@@ -238,14 +180,6 @@
return 0;
}
-static inline bool is_compat(void)
-{
- if (IS_ENABLED(CONFIG_COMPAT) && in_compat_syscall())
- return true;
-
- return false;
-}
-
static void
copy_out_compat(struct efi_variable *dst, struct compat_efi_variable *src)
{
@@ -275,7 +209,7 @@
if (!entry || !buf)
return -EINVAL;
- if (is_compat()) {
+ if (in_compat_syscall()) {
struct compat_efi_variable *compat;
if (count != sizeof(*compat))
@@ -338,7 +272,7 @@
if (ret)
return -EIO;
- if (is_compat()) {
+ if (in_compat_syscall()) {
compat = (struct compat_efi_variable *)buf;
size = sizeof(*compat);
@@ -432,7 +366,7 @@
struct compat_efi_variable *compat = (struct compat_efi_variable *)buf;
struct efi_variable *new_var = (struct efi_variable *)buf;
struct efivar_entry *new_entry;
- bool need_compat = is_compat();
+ bool need_compat = in_compat_syscall();
efi_char16_t *name;
unsigned long size;
u32 attributes;
@@ -509,7 +443,7 @@
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- if (is_compat()) {
+ if (in_compat_syscall()) {
if (count != sizeof(*compat))
return -EINVAL;
@@ -655,42 +589,6 @@
return error;
}
-static int efivar_update_sysfs_entry(efi_char16_t *name, efi_guid_t vendor,
- unsigned long name_size, void *data)
-{
- struct efivar_entry *entry = data;
-
- if (efivar_entry_find(name, vendor, &efivar_sysfs_list, false))
- return 0;
-
- memcpy(entry->var.VariableName, name, name_size);
- memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t));
-
- return 1;
-}
-
-static void efivar_update_sysfs_entries(struct work_struct *work)
-{
- struct efivar_entry *entry;
- int err;
-
- /* Add new sysfs entries */
- while (1) {
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return;
-
- err = efivar_init(efivar_update_sysfs_entry, entry,
- false, &efivar_sysfs_list);
- if (!err)
- break;
-
- efivar_create_sysfs_entry(entry);
- }
-
- kfree(entry);
-}
-
static int efivars_sysfs_callback(efi_char16_t *name, efi_guid_t vendor,
unsigned long name_size, void *data)
{
@@ -739,16 +637,13 @@
kset_unregister(efivars_kset);
}
-int efivars_sysfs_init(void)
+static int efivars_sysfs_init(void)
{
struct kobject *parent_kobj = efivars_kobject();
int error = 0;
- if (!efi_enabled(EFI_RUNTIME_SERVICES))
- return -ENODEV;
-
/* No efivars has been registered yet */
- if (!parent_kobj)
+ if (!parent_kobj || !efivar_supports_writes())
return 0;
printk(KERN_INFO "EFI Variables Facility v%s %s\n", EFIVARS_VERSION,
@@ -768,11 +663,8 @@
return error;
}
- INIT_WORK(&efivar_work, efivar_update_sysfs_entries);
-
return 0;
}
-EXPORT_SYMBOL_GPL(efivars_sysfs_init);
module_init(efivars_sysfs_init);
module_exit(efivars_sysfs_exit);
--
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