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From: Dave Hansen <dave.hansen@intel.com>
To: Ram Pai <linuxram@us.ibm.com>, Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
shakeelb@google.com, stable@kernel.org, tglx@linutronix.de,
mpe@ellerman.id.au, mingo@kernel.org, akpm@linux-foundation.org,
shuah@kernel.org
Subject: Re: [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC
Date: Fri, 6 Apr 2018 17:47:29 -0700 [thread overview]
Message-ID: <6e3f8e1c-afed-64de-9815-8478e18532aa@intel.com> (raw)
In-Reply-To: <20180407000943.GA15890@ram.oc3035372033.ibm.com>
On 04/06/2018 05:09 PM, Ram Pai wrote:
>> - /*
>> - * Look for a protection-key-drive execute-only mapping
>> - * which is now being given permissions that are not
>> - * execute-only. Move it back to the default pkey.
>> - */
>> - if (vma_is_pkey_exec_only(vma) &&
>> - (prot & (PROT_READ|PROT_WRITE))) {
>> - return 0;
>> - }
>> +
> Dave,
> this can be simply:
>
> if ((vma_is_pkey_exec_only(vma) && (prot != PROT_EXEC))
> return ARCH_DEFAULT_PKEY;
Yes, but we're removing that code entirely. :)
next prev parent reply other threads:[~2018-04-07 0:47 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-26 17:27 [PATCH 0/9] [v2] x86, pkeys: two protection keys bug fixes Dave Hansen
2018-03-26 17:27 ` [PATCH 1/9] x86, pkeys: do not special case protection key 0 Dave Hansen
2018-03-26 17:47 ` Shuah Khan
2018-03-26 17:53 ` Dave Hansen
2018-03-26 17:58 ` Shuah Khan
2018-03-26 17:27 ` [PATCH 2/9] x86, pkeys, selftests: save off 'prot' for allocations Dave Hansen
2018-03-26 17:27 ` [PATCH 3/9] x86, pkeys, selftests: add a test for pkey 0 Dave Hansen
2018-03-26 17:27 ` [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC Dave Hansen
2018-04-07 0:09 ` Ram Pai
2018-04-07 0:47 ` Dave Hansen [this message]
2018-04-07 1:09 ` Ram Pai
2018-04-26 17:57 ` Dave Hansen
2018-04-30 7:51 ` Ram Pai
2018-04-30 16:36 ` Dave Hansen
2018-04-25 22:10 ` Shakeel Butt
2018-04-26 8:55 ` Thomas Gleixner
2018-04-26 18:17 ` Dave Hansen
2018-03-26 17:27 ` [PATCH 5/9] x86, pkeys, selftests: fix pointer math Dave Hansen
2018-03-26 17:27 ` [PATCH 6/9] x86, pkeys, selftests: fix pkey exhaustion test off-by-one Dave Hansen
2018-03-26 17:27 ` [PATCH 7/9] x86, pkeys, selftests: factor out "instruction page" Dave Hansen
2018-03-26 17:27 ` [PATCH 8/9] x86, pkeys, selftests: add allow faults on unknown keys Dave Hansen
2018-03-26 17:27 ` [PATCH 9/9] x86, pkeys, selftests: add PROT_EXEC test Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2018-04-27 17:45 [PATCH 0/9] [v3] x86, pkeys: two protection keys bug fixes Dave Hansen
2018-04-27 17:45 ` [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC Dave Hansen
2018-03-23 18:09 [PATCH 0/9] x86, pkeys: two protection keys bug fixes Dave Hansen
2018-03-23 18:09 ` [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC Dave Hansen
2018-03-23 19:15 ` Shakeel Butt
2018-03-23 19:23 ` Dave Hansen
2018-03-23 19:27 ` Shakeel Butt
2018-03-23 19:29 ` Dave Hansen
2018-03-23 19:38 ` Thomas Gleixner
2018-03-23 19:45 ` Thomas Gleixner
2018-03-23 19:48 ` Dave Hansen
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