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android/lowmemorykiller: Ignore tasks with freed mm

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A killed task can stay in the task list long after its
memory has been returned to the system, therefore
ignore any tasks whose mm struct has been freed.

Change-Id: I76394b203b4ab2312437c839976f0ecb7b6dde4e
CRs-fixed: 450383
Signed-off-by: Liam Mark <lmark@codeaurora.org>
This commit is contained in:
Liam Mark
2013-02-07 14:31:36 -08:00
committed by Iliyan Malchev
parent 8eb221e7d3
commit 19ac1a8740
5 changed files with 19 additions and 6 deletions
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2
include/linux/sched.h
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@@ -2304,7 +2304,7 @@ static inline void mmdrop(struct mm_struct * mm)
}
/* mmput gets rid of the mappings and all user-space */
extern void mmput(struct mm_struct *);
extern int mmput(struct mm_struct *);
/* Grab a reference to a task's mm, if it is not already going away */
extern struct mm_struct *get_task_mm(struct task_struct *task);
/*