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authorDave Hansen <dave.hansen@linux.intel.com>2019-07-05 20:53:21 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-07-22 12:54:57 +0300
commitf240652b6032b48ad7fa35c5e701cc4c8d697c0b (patch)
tree5b1c833f37071a7a8c4547502c9aa276afd6d943 /kernel/sys.c
parente28df79ae2dfebf18e08dc66c0948b7950e4368a (diff)
downloadlinux-f240652b6032b48ad7fa35c5e701cc4c8d697c0b.tar.xz
x86/mpx: Remove MPX APIs
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
Diffstat (limited to 'kernel/sys.c')
-rw-r--r--kernel/sys.c16
1 files changed, 2 insertions, 14 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 2969304c29fe..384b000b7865 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -103,12 +103,6 @@
#ifndef SET_TSC_CTL
# define SET_TSC_CTL(a) (-EINVAL)
#endif
-#ifndef MPX_ENABLE_MANAGEMENT
-# define MPX_ENABLE_MANAGEMENT() (-EINVAL)
-#endif
-#ifndef MPX_DISABLE_MANAGEMENT
-# define MPX_DISABLE_MANAGEMENT() (-EINVAL)
-#endif
#ifndef GET_FP_MODE
# define GET_FP_MODE(a) (-EINVAL)
#endif
@@ -2456,15 +2450,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
up_write(&me->mm->mmap_sem);
break;
case PR_MPX_ENABLE_MANAGEMENT:
- if (arg2 || arg3 || arg4 || arg5)
- return -EINVAL;
- error = MPX_ENABLE_MANAGEMENT();
- break;
case PR_MPX_DISABLE_MANAGEMENT:
- if (arg2 || arg3 || arg4 || arg5)
- return -EINVAL;
- error = MPX_DISABLE_MANAGEMENT();
- break;
+ /* No longer implemented: */
+ return -EINVAL;
case PR_SET_FP_MODE:
error = SET_FP_MODE(me, arg2);
break;