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x86/mpx: Remove MPX APIs

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MPX is being removed from the kernel due to a lack of support in the
toolchain going forward (gcc).

The first step is to remove the userspace-visible ABIs so that applications
will stop using it.  The most visible one are the enable/disable prctl()s.
Remove them first.

This is the most minimal and least invasive change needed to ensure that
apps stop using MPX with new kernels.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190705175321.DB42F0AD@viggo.jf.intel.com
This commit is contained in:
Dave Hansen
2019-07-05 10:53:21 -07:00
committed by Thomas Gleixner
parent e28df79ae2
commit f240652b60
2 changed files with 3 additions and 15 deletions
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2
include/uapi/linux/prctl.h
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@@ -181,7 +181,7 @@ struct prctl_mm_map {
#define PR_GET_THP_DISABLE 42
/*
* Tell the kernel to start/stop helping userspace manage bounds tables.
* No longer implemented, but left here to ensure the numbers stay reserved:
*/
#define PR_MPX_ENABLE_MANAGEMENT 43
#define PR_MPX_DISABLE_MANAGEMENT 44