Vineet Gupta 8aa9e85ada ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe ... There was a very small race window where resume to kernel mode from a Exception Path (or pure kernel mode which is true for most of ARC exceptions anyways), was not disabling interrupts in restore_regs, clobbering the exception regs Anton found the culprit call flow (after many sleepless nights) | 1. we got a Trap from user land | 2. started to service it. | 3. While doing some stuff on user-land memory (I think it is padzero()), | we got a DataTlbMiss | 4. On return from it we are taking "resume_kernel_mode" path | 5. NEED_RESHED is not set, so we go to "return from exception" path in | restore regs. | 6. there seems to be IRQ happening Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: <stable@vger.kernel.org> #3.10, 3.12, 3.13, 3.14 Cc: Anton Kolesov <Anton.Kolesov@synopsys.com> Cc: Francois Bedard <Francois.Bedard@synopsys.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-04-30 08:21:43 -07:00
..
boot	ARC: [nsimosci] Unbork console	2014-04-05 18:36:51 +05:30
configs	ARC: [nsimosci] Unbork console	2014-04-05 18:36:51 +05:30
include	ARC: Delete stale barrier.h	2014-04-18 13:49:15 -07:00
kernel	ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe	2014-04-30 08:21:43 -07:00
lib	ARC: switch to generic ENTRY/END assembler annotations	2014-03-26 14:31:28 +05:30
mm	ARC: [SMP] General Fixes	2014-04-05 14:46:42 +05:30
oprofile
plat-arcfpga	ARC: Remove ARC_HAS_COH_RTSC	2014-03-26 14:31:28 +05:30
plat-tb10x	ARC: [TB10x] Updates for GPIO and pinctrl	2013-11-11 09:57:44 +05:30
Kbuild
Kconfig	Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP	2014-04-07 16:36:11 -07:00
Kconfig.debug
Makefile