Date: Mon, 07 Mar 2016 03:28:12 +0000 (GMT)
From: Daeho Jeong <daeho.jeong@samsung.com>
Subject: Question about percpu_free_rwsem function
To: "paulmck@linux.vnet.ibm.com" <paulmck@linux.vnet.ibm.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: Daeho Jeong <daeho.jeong@samsung.com>
Reply-to: daeho.jeong@samsung.com
MIME-version: 1.0
Msgkey: 20160307032737673@daeho.jeong
Content-type: text/plain; charset=utf-8
MIME-version: 1.0
Message-id: <37141218.258171457321291665.JavaMail.weblogic@ep2mlwas02b>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org
Content-Transfer-Encoding: 8bit
Content-Length: 594
Lines: 13

Hi,

I got a trouble while I am developing a patch for EXT4 filesytem.
Actually, I used a percpu rw semaphore in my patch and there was no
problem when I built EXT4 filesystem as built-in mode. However, when
kbuild auto build robot built EXT4 filesystem with my patch as a "module",
a bulid error occurred because percpu_free_rwsem() function is not exported.

I noticed that other functions except percpu_free_rwsem() were exported in 2015.
Is there any reason for percpu_free_rwsem() not to be exported?
If I need the function to be exported, should I do that in my patch? :-)

Best Regards,