Stafford Horne 313a5257b8 openrisc: fix boot oops when DEBUG_VM is enabled ... Since v5.8-rc1 OpenRISC Linux fails to boot when DEBUG_VM is enabled. This has been bisected to commit 42fc541404 ("mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked()"). The added locking checks exposed the issue that OpenRISC was not taking this mmap lock when during page walks for DMA operations. This patch locks and unlocks the mmap lock for page walking. Link: http://lkml.kernel.org/r/20200617090247.1680188-1-shorne@gmail.com Fixes: 42fc541404 ("mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked()" Signed-off-by: Stafford Horne <shorne@gmail.com> Reviewed-by: Michel Lespinasse <walken@google.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Steven Price <steven.price@arm.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-06-26 00:27:36 -07:00
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boot/dts	or1k: dts: Add ethoc device to SMP devicetree	2019-08-31 11:56:19 +09:00
configs	openrisc: configs: Cleanup CONFIG_CROSS_COMPILE	2020-01-31 22:10:58 +09:00
include	mm: consolidate pte_index() and pte_offset_*() definitions	2020-06-09 09:39:14 -07:00
kernel	openrisc: fix boot oops when DEBUG_VM is enabled	2020-06-26 00:27:36 -07:00
lib	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
mm	mmap locking API: convert mmap_sem API comments	2020-06-09 09:39:14 -07:00
Kconfig	OpenRISC updates for 5.6	2020-04-07 12:33:37 -07:00
Kconfig.debug	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	openrisc: remove unneeded code in arch/openrisc/Makefile	2019-01-17 23:42:59 +09:00