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 3/9] x86, mpx: we do not allocate the bounds directory
Date: Mon, 02 Feb 2015 13:31:31 -0800 [thread overview]
Message-ID: <20150202213131.B1547BE2@viggo.jf.intel.com> (raw)
In-Reply-To: <20150202213127.0171DBC1@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 2015-01-30 10:16:12.955450664 -0800
+++ b/arch/x86/mm/mpx.c 2015-01-30 10:16:12.959450844 -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:[~2015-02-02 21:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 21:31 [PATCH 0/9] x86, mpx: Support 32-bit binaries on 64-bit kernels Dave Hansen
2015-02-02 21:31 ` [PATCH 1/9] x86: make is_64bit_mm() widely available Dave Hansen
2015-02-02 21:31 ` [PATCH 2/9] x86: make __VIRTUAL_MASK safe to use on 32 bit Dave Hansen
2015-02-02 21:31 ` Dave Hansen [this message]
2015-02-02 21:31 ` [PATCH 4/9] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-02-02 21:31 ` [PATCH 5/9] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-02-02 21:31 ` [PATCH 6/9] x86, mpx: new directory entry to addr helper Dave Hansen
2015-02-02 21:31 ` [PATCH 7/9] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-02-02 21:31 ` [PATCH 8/9] x86, mpx: support 32bit binaries on 64bit kernel Dave Hansen
2015-02-02 21:31 ` [PATCH 9/9] x86, mpx: allow mixed binaries again Dave Hansen
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