mmap locking API: convert nested write lock sites

Add API for nested write locks and convert the few call sites doing that.

Michel Lespinasse committed 6 years ago

Commit aaa2cc51 parent 89154dd3 files · +8 −2Browse files

Showing the changes to include/linux (1 of 3 files). Show all

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@@ -11,6 +11,11 @@ static inline void mmap_write_lock(struct mm_struct *mm) · 10 unmodified lines
11	11	down_write(&mm->mmap_sem);
12	12	}
13	13
	14	+static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
	15	+{
	16	+ down_write_nested(&mm->mmap_sem, subclass);
	17	+}
	18	+
14	19	static inline int mmap_write_lock_killable(struct mm_struct *mm)
15	20	{
16	21	return down_write_killable(&mm->mmap_sem);