Min_low_pfn and max_low_pfn were used in pfn_valid macro if defined CONFIG_FLATMEM. When the functions that use the pfn_valid is used in driver module, max_low_pfn and min_low_pfn is to undefined, and fail to build. ERROR: "min_low_pfn" [drivers/block/aoe/aoe.ko] undefined! ERROR: "max_low_pfn" [drivers/block/aoe/aoe.ko] undefined! make[2]: *** [__modpost] Error 1 make[1]: *** [modules] Error 2 This patch fix this problem. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@xxxxxxxxxxx> Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxx> Cc: Paul Mundt <lethal@xxxxxxxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/sh/kernel/sh_ksyms_32.c | 5 +++++ 1 file changed, 5 insertions(+) diff -puN arch/sh/kernel/sh_ksyms_32.c~sh-add-export_symbolmin_low_pfn-and-export_symbolmax_low_pfn-to-sh_ksyms_32c arch/sh/kernel/sh_ksyms_32.c --- a/arch/sh/kernel/sh_ksyms_32.c~sh-add-export_symbolmin_low_pfn-and-export_symbolmax_low_pfn-to-sh_ksyms_32c +++ a/arch/sh/kernel/sh_ksyms_32.c @@ -20,6 +20,11 @@ EXPORT_SYMBOL(csum_partial_copy_generic) EXPORT_SYMBOL(copy_page); EXPORT_SYMBOL(__clear_user); EXPORT_SYMBOL(empty_zero_page); +#ifdef CONFIG_FLATMEM +/* need in pfn_valid macro */ +EXPORT_SYMBOL(min_low_pfn); +EXPORT_SYMBOL(max_low_pfn); +#endif #define DECLARE_EXPORT(name) \ extern void name(void);EXPORT_SYMBOL(name) _ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html