add led

hc

2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/arch/um/include/asm/mmu_context.h
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@@ -1,6 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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 /* 
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  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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- * Licensed under the GPL
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  */
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 #ifndef __UM_MMU_CONTEXT_H
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@@ -8,6 +8,7 @@
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 #include <linux/sched.h>
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 #include <linux/mm_types.h>
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+#include <linux/mmap_lock.h>
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 #include <asm/mmu.h>
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@@ -22,15 +23,9 @@
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 }
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 extern void arch_exit_mmap(struct mm_struct *mm);
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 static inline void arch_unmap(struct mm_struct *mm,
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-			struct vm_area_struct *vma,
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 			unsigned long start, unsigned long end)
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 {
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 }
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-static inline void arch_bprm_mm_init(struct mm_struct *mm,
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-				     struct vm_area_struct *vma)
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-{
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-}
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-
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 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
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 		bool write, bool execute, bool foreign)
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 {
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@@ -53,9 +48,9 @@
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 	 * when the new ->mm is used for the first time.
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 	 */
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 	__switch_mm(&new->context.id);
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-	down_write_nested(&new->mmap_sem, 1);
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+	mmap_write_lock_nested(new, SINGLE_DEPTH_NESTING);
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 	uml_setup_stubs(new);
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-	up_write(&new->mmap_sem);
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+	mmap_write_unlock(new);
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 }
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 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,