x86, mm: Ensure correct alignment of the fixmap

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The early_ioremap code requires that its buffers not span a PMD
boundary.  The logic for ensuring that only works if the fixmap is
aligned, so assert that it's aligned correctly.

To make this work reliably, reserve_top_address needs to be
adjusted.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/e59a5f4362661f75dd4841fa74e1f2448045e245.1399317206.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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Andy Lutomirski 2014-05-05 12:19:31 -07:00 • committed by H. Peter Anvin

parent 89ca3b8819

commit 73159fdcdb

2 changed files with 9 additions and 3 deletions

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6

arch/x86/mm/ioremap.c

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6

arch/x86/mm/pgtable.c

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