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x86, olpc: Add comment about implicit optimization barrier
author
Andres Salomon
<dilinger@queued.net>
Thu, 24 Jun 2010 00:27:00 +0000
(20:27 -0400)
committer
Ingo Molnar
<mingo@elte.hu>
Thu, 24 Jun 2010 09:40:47 +0000
(11:40 +0200)
Signed-off-by: Andres Salomon <dilinger@queued.net>
Cc: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <
20100618174653
.
7755a39a
@dev.queued.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/olpc_ofw.c
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diff --git
a/arch/x86/kernel/olpc_ofw.c
b/arch/x86/kernel/olpc_ofw.c
index
469ee43
..
f5d499f
100644
(file)
--- a/
arch/x86/kernel/olpc_ofw.c
+++ b/
arch/x86/kernel/olpc_ofw.c
@@
-35,6
+35,8
@@
void __init setup_olpc_ofw_pgd(void)
/* install OFW's PDE permanently into the kernel's pgtable */
set_pgd(&swapper_pg_dir[OLPC_OFW_PDE_NR], *ofw_pde);
+ /* implicit optimization barrier here due to uninline function return */
+
early_iounmap(base, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
}