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(parent: 67610e6) | patch
ARM: idmap: add identity mapping usage note
authorRussell King <rmk+kernel@arm.linux.org.uk>
Tue, 29 Jul 2014 11:18:34 +0000 (12:18 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Sat, 2 Aug 2014 14:20:26 +0000 (15:20 +0100)
commita6f620f2ee3b97edd87aaeb5fa139f0da7eb447a
tree58fbb35b4c2fe14941c7d8c21f2053cf46addbd7tree | snapshot
parent67610e6d95591746aef38b4eaa95be19c8866983commit | diff
ARM: idmap: add identity mapping usage note

Add a note about the usage of the identity mapping; we do not support
accesses outside of the identity map region and kernel image while a
CPU is using the identity map.  This is because the identity mapping
may overwrite vmalloc space, IO mappings, the vectors pages, etc.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/mm/idmap.c diff | blob | history
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