Hi all, This is another resend of several task->mm fixes, the bugs I found during LMK code audit. Architectures were traverse the tasklist in an unsafe manner, plus there are a few cases of unsafe access to task->mm in general. There were no objections on the previous resend, and the final words were somewhere along "the patches are fine" line. In v3: - Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch; - Reword arm and sh commit messages, per Oleg Nesterov's suggestions; - Added an optimization trick in clear_tasks_mm_cpumask(): take only the rcu read lock, no need for the whole tasklist_lock. Suggested by Peter Zijlstra. In v2: - introduced a small helper in cpu.c: most arches duplicate the same [buggy] code snippet, so it's better to fix it and move the logic into a common function. Thanks, -- Anton Vorontsov Email: cbouatmailru@xxxxxxxxx -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>