From 6e68b08728ce3365c713f8663c6b05a79e2bbca1 Mon Sep 17 00:00:00 2001 From: Vinson Lee Date: Sat, 17 Sep 2016 00:51:53 +0000 Subject: [PATCH] x86/vdso: Use CONFIG_X86_X32_ABI to enable vdso prctl The prctl code which references vdso_image_x32 is built when CONFIG_X86_X32 is set. This results in the following build failure: LD init/built-in.o arch/x86/built-in.o: In function `do_arch_prctl': (.text+0x27466): undefined reference to `vdso_image_x32' vdso_image_x32 depends on CONFIG_X86_X32_ABI. So we need to make the prctl depend on that as well. [ tglx: Massaged changelog ] Fixes: 2eefd8789698 ("x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*") Signed-off-by: Vinson Lee Reviewed-by: Dmitry Safonov Cc: Andy Lutomirski Cc: Brian Gerst Cc: Borislav Petkov Cc: Dmitry Vyukov Link: http://lkml.kernel.org/r/1474073513-6656-1-git-send-email-vlee@freedesktop.org Signed-off-by: Thomas Gleixner --- arch/x86/kernel/process_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index b26a0092a01d..b4603b71a659 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -592,7 +592,7 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr) } #ifdef CONFIG_CHECKPOINT_RESTORE -# ifdef CONFIG_X86_X32 +# ifdef CONFIG_X86_X32_ABI case ARCH_MAP_VDSO_X32: return prctl_map_vdso(&vdso_image_x32, addr); # endif -- 2.20.1