arm64: Initialise high_memory global variable earlier

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commit f24e5834a2 upstream.

The high_memory global variable is used by
cma_declare_contiguous(.) before it is defined.

We don't notice this as we compute __pa(high_memory - 1), and it looks
like we're processing a VA from the direct linear map.

This problem becomes apparent when we flip the kernel virtual address
space and the linear map is moved to the bottom of the kernel VA space.

This patch moves the initialisation of high_memory before it used.

Fixes: f7426b983a ("mm: cma: adjust address limit to avoid hitting low/high memory boundary")
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Steve Capper 2017-12-04 14:13:05 +00:00 • committed by Greg Kroah-Hartman

parent 76fcdc8cbb

commit bb95f1caee

1 changed files with 1 additions and 1 deletions

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arch/arm64/mm/init.c

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