Heiko Carstens b4d70a6134 s390/mm: use invalid asce for user space when switching to init_mm ... Currently only idle_task_exit() explicitly switches (switch_mm) to init_mm. This causes the kernel asce to be loaded into cr7 and therefore it would be used for potential user space accesses. This is currently no problem since idle_task_exit() is nearly the last thing a CPU executes before it is taken down. However things might change - and therefore make sure that always the invalid asce is used for cr7 when active_mm is init_mm. This makes sure that all potential user space accesses will fail, instead of accessing kernel address space. Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>		2020-12-09 21:02:08 +01:00
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asm	s390/mm: use invalid asce for user space when switching to init_mm	2020-12-09 21:02:08 +01:00
uapi/asm	s390/sie: fix typo in SIGP code description	2020-10-07 21:50:02 +02:00