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x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*

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Add API to change vdso blob type with arch_prctl.
As this is usefull only by needs of CRIU, expose
this interface under CONFIG_CHECKPOINT_RESTORE.

Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: 0x7f454c46@gmail.com
Cc: oleg@redhat.com
Cc: linux-mm@kvack.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-4-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Dmitry Safonov
2016-09-05 16:33:05 +03:00
committed by Thomas Gleixner
parent 576ebfefd3
commit 2eefd87896
6 changed files with 78 additions and 10 deletions
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6
arch/x86/include/uapi/asm/prctl.h
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@@ -6,4 +6,10 @@
#define ARCH_GET_FS 0x1003
#define ARCH_GET_GS 0x1004
#ifdef CONFIG_CHECKPOINT_RESTORE
# define ARCH_MAP_VDSO_X32 0x2001
# define ARCH_MAP_VDSO_32 0x2002
# define ARCH_MAP_VDSO_64 0x2003
#endif
#endif /* _ASM_X86_PRCTL_H */