From 50a212ec906f7524620675f0c57357691c26c81f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 16 Oct 2024 01:20:19 +0000
Subject: [PATCH] 修改GPIO导出默认初始值
---
kernel/arch/um/kernel/skas/mmu.c | 23 +++++++++++++++--------
1 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/kernel/arch/um/kernel/skas/mmu.c b/kernel/arch/um/kernel/skas/mmu.c
index 7a1f2a9..d996116 100644
--- a/kernel/arch/um/kernel/skas/mmu.c
+++ b/kernel/arch/um/kernel/skas/mmu.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <linux/mm.h>
@@ -9,7 +9,6 @@
#include <linux/slab.h>
#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
#include <asm/sections.h>
#include <as-layout.h>
#include <os.h>
@@ -19,14 +18,20 @@
unsigned long kernel)
{
pgd_t *pgd;
+ p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
pgd = pgd_offset(mm, proc);
- pud = pud_alloc(mm, pgd, proc);
- if (!pud)
+
+ p4d = p4d_alloc(mm, pgd, proc);
+ if (!p4d)
goto out;
+
+ pud = pud_alloc(mm, p4d, proc);
+ if (!pud)
+ goto out_pud;
pmd = pmd_alloc(mm, pud, proc);
if (!pmd)
@@ -44,6 +49,8 @@
pmd_free(mm, pmd);
out_pmd:
pud_free(mm, pud);
+ out_pud:
+ p4d_free(mm, p4d);
out:
return -ENOMEM;
}
@@ -63,12 +70,12 @@
if (current->mm != NULL && current->mm != &init_mm)
from_mm = ¤t->mm->context;
- block_signals();
+ block_signals_trace();
if (from_mm)
to_mm->id.u.pid = copy_context_skas0(stack,
from_mm->id.u.pid);
else to_mm->id.u.pid = start_userspace(stack);
- unblock_signals();
+ unblock_signals_trace();
if (to_mm->id.u.pid < 0) {
ret = to_mm->id.u.pid;
@@ -107,7 +114,7 @@
mm->context.stub_pages[0] = virt_to_page(__syscall_stub_start);
mm->context.stub_pages[1] = virt_to_page(mm->context.id.stack);
- /* dup_mmap already holds mmap_sem */
+ /* dup_mmap already holds mmap_lock */
err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START,
VM_READ | VM_MAYREAD | VM_EXEC |
VM_MAYEXEC | VM_DONTCOPY | VM_PFNMAP,
@@ -119,7 +126,7 @@
return;
out:
- force_sigsegv(SIGSEGV, current);
+ force_sigsegv(SIGSEGV);
}
void arch_exit_mmap(struct mm_struct *mm)
--
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