Am 24.03.2012 11:30, schrieb Anton Vorontsov: > Checking for task->mm is dangerous as ->mm might disappear (exit_mm() > assigns NULL under task_lock(), so tasklist lock is not enough). > > We can't use get_task_mm()/mmput() pair as mmput() might sleep, > so let's take the task lock while we care about its mm. > > Note that we should also use find_lock_task_mm() to check all process' > threads for a valid mm, but for uml we'll do it in a separate patch. > > Signed-off-by: Anton Vorontsov <anton.vorontsov@xxxxxxxxxx> Acked-by: Richard Weinberger <richard@xxxxxx> Thanks, //richard
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