From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/arch/arm64/include/asm/futex.h | 31 ++++++++-----------------------
1 files changed, 8 insertions(+), 23 deletions(-)
diff --git a/kernel/arch/arm64/include/asm/futex.h b/kernel/arch/arm64/include/asm/futex.h
index 232917e..8e41faa 100644
--- a/kernel/arch/arm64/include/asm/futex.h
+++ b/kernel/arch/arm64/include/asm/futex.h
@@ -1,22 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_FUTEX_H
#define __ASM_FUTEX_H
-
-#ifdef __KERNEL__
#include <linux/futex.h>
#include <linux/uaccess.h>
@@ -29,7 +16,7 @@
do { \
unsigned int loops = FUTEX_MAX_LOOPS; \
\
- uaccess_enable(); \
+ uaccess_enable_privileged(); \
asm volatile( \
" prfm pstl1strm, %2\n" \
"1: ldxr %w1, %2\n" \
@@ -52,7 +39,7 @@
"+r" (loops) \
: "r" (oparg), "Ir" (-EFAULT), "Ir" (-EAGAIN) \
: "memory"); \
- uaccess_disable(); \
+ uaccess_disable_privileged(); \
} while (0)
static inline int
@@ -61,7 +48,8 @@
int oldval = 0, ret, tmp;
u32 __user *uaddr = __uaccess_mask_ptr(_uaddr);
- pagefault_disable();
+ if (!access_ok(_uaddr, sizeof(u32)))
+ return -EFAULT;
switch (op) {
case FUTEX_OP_SET:
@@ -88,8 +76,6 @@
ret = -ENOSYS;
}
- pagefault_enable();
-
if (!ret)
*oval = oldval;
@@ -105,11 +91,11 @@
u32 val, tmp;
u32 __user *uaddr;
- if (!access_ok(VERIFY_WRITE, _uaddr, sizeof(u32)))
+ if (!access_ok(_uaddr, sizeof(u32)))
return -EFAULT;
uaddr = __uaccess_mask_ptr(_uaddr);
- uaccess_enable();
+ uaccess_enable_privileged();
asm volatile("// futex_atomic_cmpxchg_inatomic\n"
" prfm pstl1strm, %2\n"
"1: ldxr %w1, %2\n"
@@ -132,7 +118,7 @@
: "+r" (ret), "=&r" (val), "+Q" (*uaddr), "=&r" (tmp), "+r" (loops)
: "r" (oldval), "r" (newval), "Ir" (-EFAULT), "Ir" (-EAGAIN)
: "memory");
- uaccess_disable();
+ uaccess_disable_privileged();
if (!ret)
*uval = val;
@@ -140,5 +126,4 @@
return ret;
}
-#endif /* __KERNEL__ */
#endif /* __ASM_FUTEX_H */
--
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