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| author |   Andres Salomon <dilinger@queued.net> | 2010-06-23 20:27:00 -0400 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2010-06-24 11:40:47 +0200 |
| commit | 75a9cac430a1bd2a5219c74508ca01b0ddfddc9a (patch) | |
| tree | 3d30fc26b4119d99aaaa1300da5ca2d6bd4299ab | |
| parent | x86, olpc: Add support for calling into OpenFirmware (diff) | |
| download | linux-dev-75a9cac430a1bd2a5219c74508ca01b0ddfddc9a.tar.xz linux-dev-75a9cac430a1bd2a5219c74508ca01b0ddfddc9a.zip | |
x86, olpc: Add comment about implicit optimization barrier
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>
| -rw-r--r-- | arch/x86/kernel/olpc_ofw.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); } |