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| author |   Dave Hansen <dave.hansen@linux.intel.com> | 2019-07-05 10:53:21 -0700 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 11:54:57 +0200 |
| commit | f240652b6032b48ad7fa35c5e701cc4c8d697c0b (patch) | |
| tree | 5b1c833f37071a7a8c4547502c9aa276afd6d943 /kernel/sys.c | |
| parent | x86/mpx: Remove selftests themselves (diff) | |
| download | linux-dev-f240652b6032b48ad7fa35c5e701cc4c8d697c0b.tar.xz linux-dev-f240652b6032b48ad7fa35c5e701cc4c8d697c0b.zip | |
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.c | 16 |
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; |