From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Rothwell <sfr@canb.auug.org.au>
Subject: linux-next: build failure after merge of the rcu tree
Date: Wed, 19 Apr 2017 13:50:16 +1000
Message-ID: <20170419135016.259c2d59@canb.auug.org.au>
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To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Linux-Next Mailing List <linux-next@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>

Hi Paul,

After merging the rcu tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

kernel/rcu/rcutorture.c: In function 'rcu_torture_stats_print':
kernel/rcu/rcutorture.c:1369:3: error: implicit declaration of function 'srcutorture_get_gp_data' [-Werror=implicit-function-declaration]
   srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
   ^

Caused by commit

  b4d55cac0a93 ("srcu: Make rcutorture writer stalls print SRCU GP state")

This config has CONFIG_CLASSIC_SRCU=y and CONFIG_RCU_TORTURE_TEST=m, so
CONFIG_RCU_TORTURE_TEST is not defined - CONFIG_RCU_TORTURE_TEST_MODULE
is defined.  You probably want to protect srcutorture_get_gp_data() with
IS_ENABLED(CONFIG_RCU_TORTURE_TEST) instead.

I have used the rcu tree from next-20170418 for today.

-- 
Cheers,
Stephen Rothwell