From: Frank Rowand <frank.row...@sony.com> x86_flattree_get_config() is incorrectly protected by ifdef CONFIG_OF_FLATTREE. It uses of_get_flat_dt_size(), which only exists if CONFIG_OF_EARLY_FLATTREE. This issue has not been exposed previously because OF_FLATTREE did not occur unless it was selected by OF_EARLY_FLATTREE. A devicetree overlay change is selecting OF_FLATTREE directly instead of indirectly enabling it by selecting OF_EARLY_FLATTREE.
This problem was exposed by a randconfig generated by the kbuild test robot, where Platform OLPC was enabled. OLPC selects OF_PROMTREE instead of OF_EARLY_FLATREE. The only other x86 platform that selects OF is X86_INTEL_CE, which does select OF_EARLY_FLATTREE. Signed-off-by: Frank Rowand <frank.row...@sony.com> --- The devicetree overlay change is in patch 1/4 of the series: https://lkml.org/lkml/2018/3/2/979 The pull request for the patch series that triggered the kbuild test robot is: https://lkml.org/lkml/2018/3/2/1065 arch/x86/kernel/devicetree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index 25de5f6ca997..45416826f6ee 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -259,7 +259,7 @@ static void __init dtb_apic_setup(void) dtb_ioapic_setup(); } -#ifdef CONFIG_OF_FLATTREE +#ifdef CONFIG_OF_EARLY_FLATTREE static void __init x86_flattree_get_config(void) { u32 size, map_len; -- Frank Rowand <frank.row...@sony.com>
