powerpc: Fix ioremap_flags() with book3e pte definition

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commit 55052eeca6 upstream.

We can't just clear the user read permission in book3e pte, because
that will also clear supervisor read permission.  This surely isn't
desired.  Fix the problem by adding the supervisor read back.

BenH: Slightly simplified the ifdef and applied to ppc64 too

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

...

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Benjamin Herrenschmidt 2010-04-07 14:39:36 +10:00 • committed by Greg Kroah-Hartman

parent f7055d7153

commit 71f530c0cb

2 changed files with 16 additions and 0 deletions

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arch/powerpc/mm/pgtable_32.c

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8

arch/powerpc/mm/pgtable_64.c

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