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Unverified Commit 6433bd75 authored by Alexander Winkowski's avatar Alexander Winkowski Committed by basamaryan
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Revert "ANDROID: mm: assert that mmap_lock is taken exclusively in vm_write_begin" 



This reverts commit b144c416.

Change-Id: Iacc9012268a5e7aedfe38afd8766e84a042a30b5
Signed-off-by: default avatarAlexander Winkowski <dereference23@outlook.com>
parent 33c1fad3

include/linux/mm.h

+0 −7
Original line number Original line Diff line number Diff line
@@ -1488,13 +1488,6 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping, 
#ifdef CONFIG_SPECULATIVE_PAGE_FAULT

#ifdef CONFIG_SPECULATIVE_PAGE_FAULT

static inline void vm_write_begin(struct vm_area_struct *vma)

static inline void vm_write_begin(struct vm_area_struct *vma)

{

{

	/*

	 * Isolated vma might be freed without exclusive mmap_lock but

	 * speculative page fault handler still needs to know it was changed.

	 */

	if (!RB_EMPTY_NODE(&vma->vm_rb))

		WARN_ON_ONCE(!rwsem_is_locked(&(vma->vm_mm)->mmap_sem));



	write_seqcount_begin(&vma->vm_sequence);

	write_seqcount_begin(&vma->vm_sequence);

}

}

static inline void vm_write_begin_nested(struct vm_area_struct *vma,

static inline void vm_write_begin_nested(struct vm_area_struct *vma,