From 75a9cac430a1bd2a5219c74508ca01b0ddfddc9a Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Wed, 23 Jun 2010 20:27:00 -0400 Subject: [PATCH] x86, olpc: Add comment about implicit optimization barrier Signed-off-by: Andres Salomon Cc: H. Peter Anvin LKML-Reference: <20100618174653.7755a39a@dev.queued.net> Signed-off-by: Ingo Molnar --- arch/x86/kernel/olpc_ofw.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/olpc_ofw.c b/arch/x86/kernel/olpc_ofw.c index 469ee4384295..f5d499fbe74f 100644 --- 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); } -- 2.39.2