iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/vdso: Use CONFIG_X86_X32_ABI to enable vdso prctl

Browse Source 
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 <vlee@freedesktop.org>
Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/1474073513-6656-1-git-send-email-vlee@freedesktop.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Vinson Lee 2016-09-17 00:51:53 +00:00 committed by Thomas Gleixner
parent 3947f49302
commit 6e68b08728
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/process_64.c
View File

@ -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