ARM: idmap: add identity mapping usage note

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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>

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Russell King 2014-07-29 12:18:34 +01:00

parent 811a2407a3

commit c5cc87fa8d

1 changed files with 5 additions and 0 deletions

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arch/arm/mm/idmap.c

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