Vineet Gupta 9c41f4eeb9 ARC: Incorrect mm reference used in vmalloc fault handler ... A vmalloc fault needs to sync up PGD/PTE entry from init_mm to current task's "active_mm". ARC vmalloc fault handler however was using mm. A vmalloc fault for non user task context (actually pre-userland, from init thread's open for /dev/console) caused the handler to deref NULL mm (for mm->pgd) The reasons it worked so far is amazing: 1. By default (!SMP), vmalloc fault handler uses a cached value of PGD. In SMP that MMU register is repurposed hence need for mm pointer deref. 2. In pre-3.12 SMP kernel, the problem triggering vmalloc didn't exist in pre-userland code path - it was introduced with commit 20bafb3d23 "n_tty: Move buffers into n_tty_data" Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Gilad Ben-Yossef <gilad@benyossef.com> Cc: Noam Camus <noamc@ezchip.com> Cc: stable@vger.kernel.org #3.10 and 3.11 Cc: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-11-02 10:27:04 -07:00
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Makefile	ARC: [mm] Aliasing VIPT dcache support 4/4	2013-05-09 22:00:57 +05:30
cache_arc700.c	ARC: Code cosmetics (Nothing semantical)	2013-08-29 17:51:15 +05:30
dma.c	ARC: I/O and DMA Mappings	2013-02-15 23:15:54 +05:30
extable.c	ARC: Fix coding style issues	2013-04-09 12:21:14 +05:30
fault.c	ARC: Incorrect mm reference used in vmalloc fault handler	2013-11-02 10:27:04 -07:00
init.c	of: Specify initrd location using 64-bit	2013-07-24 11:10:01 +01:00
ioremap.c	ARC: Use <linux/*> headers instead of <asm/*>	2013-04-09 12:21:14 +05:30
mmap.c	ARC: [mm] Aliasing VIPT dcache support 4/4	2013-05-09 22:00:57 +05:30
tlb.c	ARC: [ASID] Track ASID allocation cycles/generations	2013-08-30 21:42:19 +05:30
tlbex.S	ARC: [ASID] Track ASID allocation cycles/generations	2013-08-30 21:42:19 +05:30