From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/arch/hexagon/mm/vm_fault.c | 42 +++++++++++++-----------------------------
1 files changed, 13 insertions(+), 29 deletions(-)
diff --git a/kernel/arch/hexagon/mm/vm_fault.c b/kernel/arch/hexagon/mm/vm_fault.c
index eb263e6..ef32c5a 100644
--- a/kernel/arch/hexagon/mm/vm_fault.c
+++ b/kernel/arch/hexagon/mm/vm_fault.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Memory fault handling for Hexagon
*
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
*/
/*
@@ -24,7 +11,6 @@
* execptions.
*/
-#include <asm/pgtable.h>
#include <asm/traps.h>
#include <linux/uaccess.h>
#include <linux/mm.h>
@@ -32,6 +18,7 @@
#include <linux/signal.h>
#include <linux/extable.h>
#include <linux/hardirq.h>
+#include <linux/perf_event.h>
/*
* Decode of hardware exception sends us to one of several
@@ -54,7 +41,7 @@
int si_code = SEGV_MAPERR;
vm_fault_t fault;
const struct exception_table_entry *fixup;
- unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
+ unsigned int flags = FAULT_FLAG_DEFAULT;
/*
* If we're in an interrupt or have no user context,
@@ -67,8 +54,10 @@
if (user_mode(regs))
flags |= FAULT_FLAG_USER;
+
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
vma = find_vma(mm, address);
if (!vma)
goto bad_area;
@@ -102,30 +91,25 @@
break;
}
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, regs);
- if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ if (fault_signal_pending(fault, regs))
return;
/* The most common case -- we are done. */
if (likely(!(fault & VM_FAULT_ERROR))) {
if (flags & FAULT_FLAG_ALLOW_RETRY) {
- if (fault & VM_FAULT_MAJOR)
- current->maj_flt++;
- else
- current->min_flt++;
if (fault & VM_FAULT_RETRY) {
- flags &= ~FAULT_FLAG_ALLOW_RETRY;
flags |= FAULT_FLAG_TRIED;
goto retry;
}
}
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
return;
}
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
/* Handle copyin/out exception cases */
if (!user_mode(regs))
@@ -148,14 +132,14 @@
si_signo = SIGSEGV;
si_code = SEGV_ACCERR;
}
- force_sig_fault(si_signo, si_code, (void __user *)address, current);
+ force_sig_fault(si_signo, si_code, (void __user *)address);
return;
bad_area:
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
if (user_mode(regs)) {
- force_sig_fault(SIGSEGV, si_code, (void __user *)address, current);
+ force_sig_fault(SIGSEGV, si_code, (void __user *)address);
return;
}
/* Kernel-mode fault falls through */
--
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