From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen <dave@sr71.net>,
dave.hansen@linux.intel.com
Subject: [PATCH 06/19] x86, mpx: we do not allocate the bounds directory
Date: Fri, 08 May 2015 11:59:51 -0700 [thread overview]
Message-ID: <20150508185951.971F11F2@viggo.jf.intel.com> (raw)
In-Reply-To: <20150508185948.4C19F4B0@viggo.jf.intel.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
The comment and code here are confusing. We do not currently
allocate the bounds directory in the kernel.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
---
b/arch/x86/mm/mpx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN arch/x86/mm/mpx.c~x86-mpx-we-do-not-allocate-the-bounds-directory arch/x86/mm/mpx.c
--- a/arch/x86/mm/mpx.c~x86-mpx-we-do-not-allocate-the-bounds-directory 2015-05-08 11:46:12.671657450 -0700
+++ b/arch/x86/mm/mpx.c 2015-05-08 11:46:12.675657630 -0700
@@ -47,8 +47,8 @@ static unsigned long mpx_mmap(unsigned l
vm_flags_t vm_flags;
struct vm_area_struct *vma;
- /* Only bounds table and bounds directory can be allocated here */
- if (len != MPX_BD_SIZE_BYTES && len != MPX_BT_SIZE_BYTES)
+ /* Only bounds table can be allocated here */
+ if (len != MPX_BT_SIZE_BYTES)
return -EINVAL;
down_write(&mm->mmap_sem);
_
next prev parent reply other threads:[~2015-05-08 18:59 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-08 18:59 [PATCH 00/19] x86, mpx updates for 4.2 (take 6) Dave Hansen
2015-05-08 18:59 ` [PATCH 01/19] x86, mpx, xsave: fix up bad get_xsave_addr() assumptions Dave Hansen
2015-05-18 19:34 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 03/19] x86, mpx: use new tsk_get_xsave_addr() Dave Hansen
2015-05-18 20:36 ` Thomas Gleixner
2015-05-19 0:01 ` Dave Hansen
2015-05-08 18:59 ` [PATCH 02/19] x86, fpu: wrap get_xsave_addr() to make it safer Dave Hansen
2015-05-18 19:38 ` Thomas Gleixner
2015-05-18 19:42 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 04/19] x86, mpx: cleanup: do not pass task around when unnecessary Dave Hansen
2015-05-18 20:38 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 05/19] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-05-18 20:38 ` Thomas Gleixner
2015-05-08 18:59 ` Dave Hansen [this message]
2015-05-18 20:43 ` [PATCH 06/19] x86, mpx: we do not allocate the bounds directory Thomas Gleixner
2015-05-08 18:59 ` [PATCH 07/19] x86, mpx: boot-time disable Dave Hansen
2015-05-18 20:45 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 08/19] x86, mpx: trace #BR exceptions Dave Hansen
2015-05-18 21:00 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 09/19] x86, mpx: trace entry to bounds exception paths Dave Hansen
2015-05-18 20:58 ` Thomas Gleixner
2015-05-18 23:06 ` Dave Hansen
2015-05-18 23:35 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 10/19] x86, mpx: trace ranged MPX operations Dave Hansen
2015-05-18 21:04 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 12/19] x86: make is_64bit_mm() widely available Dave Hansen
2015-05-18 21:06 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 11/19] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-05-18 21:04 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 13/19] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-05-18 21:07 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 14/19] x86, mpx: new directory entry to addr helper Dave Hansen
2015-05-18 21:10 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 15/19] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-05-18 21:22 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 16/19] x86, mpx: support 32-bit binaries on 64-bit kernel Dave Hansen
2015-05-18 21:53 ` Thomas Gleixner
2015-05-18 23:29 ` Dave Hansen
2015-05-18 23:37 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 17/19] x86, mpx: rewrite unmap code Dave Hansen
2015-05-18 21:55 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 18/19] x86, mpx: do not count MPX VMAs as neighbors when unmapping Dave Hansen
2015-05-18 21:54 ` Thomas Gleixner
2015-05-08 18:59 ` [PATCH 19/19] x86, mpx: allow mixed binaries again Dave Hansen
2015-05-18 21:55 ` Thomas Gleixner
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