From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, x86@kernel.org, Dave Hansen <dave@sr71.net>,
dave.hansen@linux.intel.com
Subject: [RFC][PATCH 3/8] x86, mpx: we do not allocate the bounds directory
Date: Fri, 12 Dec 2014 11:12:17 -0800 [thread overview]
Message-ID: <20141212191217.ED102A0C@viggo.jf.intel.com> (raw)
In-Reply-To: <20141212191213.579887D2@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 2014-12-12 11:11:39.858982368 -0800
+++ b/arch/x86/mm/mpx.c 2014-12-12 11:11:39.861982503 -0800
@@ -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:[~2014-12-12 19:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 19:12 [RFC][PATCH 0/8] x86, mpx: Support 32-bit binaries on 64-bit kernels Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 1/8] x86: make is_64bit_mm() widely available Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 2/8] x86: make __VIRTUAL_MASK safe to use on 32 bit Dave Hansen
2014-12-12 19:12 ` Dave Hansen [this message]
2014-12-12 19:12 ` [RFC][PATCH 4/8] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 5/8] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 6/8] x86, mpx: new directory entry to addr helper Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 7/8] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2014-12-12 19:12 ` [RFC][PATCH 8/8] x86, mpx: support 32bit binaries on 64bit kernel Dave Hansen
2014-12-12 20:22 ` [RFC][PATCH 0/8] x86, mpx: Support 32-bit binaries on 64-bit kernels Andy Lutomirski
2014-12-12 20:27 ` Dave Hansen
2014-12-12 20:48 ` Andy Lutomirski
2014-12-12 21:41 ` Dave Hansen
2014-12-12 23:04 ` Andy Lutomirski
2014-12-12 23:16 ` Dave Hansen
2014-12-13 0:11 ` Andy Lutomirski
2014-12-13 0:23 ` Dave Hansen
2014-12-13 1:45 ` Andy Lutomirski
2014-12-13 15:50 ` Dave Hansen
2014-12-12 20:27 ` Andy Lutomirski
2014-12-12 20:35 ` Dave Hansen
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