linux-kernel - Re: [PATCH 3.8-rc4-nohz3] kvm: Add missing EXPORT_SYMBOL when CONFIG

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+icZUW9g=GRQWkpHz=AmAvr3AdRxe7-PrJiDC=Vsu0R0bwRTg@mail.gmail.com>
Date:	Wed, 23 Jan 2013 16:25:55 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	"devendra.aaru" <devendra.aaru@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3.8-rc4-nohz3] kvm: Add missing EXPORT_SYMBOL when CONFIG_KVM=m

On Wed, Jan 23, 2013 at 4:20 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> On Wed, Jan 23, 2013 at 4:03 PM, Frederic Weisbecker <fweisbec@...il.com> wrote:
>> 2013/1/23 Sedat Dilek <sedat.dilek@...il.com>:
>>> On Wed, Jan 23, 2013 at 3:02 PM, Frederic Weisbecker <fweisbec@...il.com> wrote:
>>>> 2013/1/23 Steven Rostedt <rostedt@...dmis.org>:
>>>>> On Wed, 2013-01-23 at 14:46 +0100, Frederic Weisbecker wrote:
>>>>>
>>>>>> > Hmmm, yes, but why, clueless, CONFIG_KVM=y as a workaround!
>>>>>>
>>>>>> I believe he pointed out the "{i" to you. Typing mistake?
>>>>>
>>>>> In which case the CONFIG_KVM=y is a work around if that {i is within a
>>>>> #ifndef CONFIG_KVM ;-)
>>>>
>>>> No it's in #ifdef CONFIG_KVM so the right fix is:
>>>>
>>>> diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
>>>> index bbb2c2c..a13b8a3 100644
>>>> --- a/kernel/context_tracking.c
>>>> +++ b/kernel/context_tracking.c
>>>> @@ -111,14 +111,19 @@ void guest_enter(void)
>>>>         else
>>>>                 __guest_enter();
>>>>  }
>>>> +EXPORT_SYMBOL_GPL(guest_enter);
>>>>
>>>>  void guest_exit(void)
>>>>  {
>>>> +#ifndef CONFIG_KVM
>>>> +i
>>>> +#endif
>>>>         if (vtime_accounting_enabled())
>>>>                 vtime_guest_exit(current);
>>>>         else
>>>>                 __guest_exit();
>>>>  }
>>>> +EXPORT_SYMBOL_GPL(guest_exit);
>>>>  #endif
>>>
>>> So, what's the real fix for this issue?
>>
>> So CONFIG_SOMETHING doesn't work when it's a module. Hence we need to
>> remove the ifdef CONFIG_KVM around guest_enter(), guest_exit(),
>> vtime_guest_enter() and vtime_guest_exit(). Also it seems we need
>> <linux/export.h> in context_tracking.c
>
> You mean sth. like this?
>

Isn't vtime.h missing in kvm_host.h as an include?

- Sedat -

> - Sedat -
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/