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SubjectRe: [PATCH] Remove GP_REPLAY state from rcu_sync
Hi "Joel,

I love your patch! Yet something to improve:

[auto build test ERROR on rcu/dev]
[cannot apply to v5.4-rc1 next-20191004]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Joel-Fernandes-Google/Remove-GP_REPLAY-state-from-rcu_sync/20191005-024257
base: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

kernel/rcu/sync.c: In function 'rcu_sync_dtor':
>> kernel/rcu/sync.c:187:23: error: 'GP_REPLAY' undeclared (first use in this function)
if (rsp->gp_state == GP_REPLAY)
^~~~~~~~~
kernel/rcu/sync.c:187:23: note: each undeclared identifier is reported only once for each function it appears in

vim +/GP_REPLAY +187 kernel/rcu/sync.c

07899a6e5f5613 Oleg Nesterov 2015-08-21 174
07899a6e5f5613 Oleg Nesterov 2015-08-21 175 /**
07899a6e5f5613 Oleg Nesterov 2015-08-21 176 * rcu_sync_dtor() - Clean up an rcu_sync structure
07899a6e5f5613 Oleg Nesterov 2015-08-21 177 * @rsp: Pointer to rcu_sync structure to be cleaned up
07899a6e5f5613 Oleg Nesterov 2015-08-21 178 */
07899a6e5f5613 Oleg Nesterov 2015-08-21 179 void rcu_sync_dtor(struct rcu_sync *rsp)
07899a6e5f5613 Oleg Nesterov 2015-08-21 180 {
89da3b94bb9741 Oleg Nesterov 2019-04-25 181 int gp_state;
07899a6e5f5613 Oleg Nesterov 2015-08-21 182
89da3b94bb9741 Oleg Nesterov 2019-04-25 183 WARN_ON_ONCE(READ_ONCE(rsp->gp_count));
89da3b94bb9741 Oleg Nesterov 2019-04-25 184 WARN_ON_ONCE(READ_ONCE(rsp->gp_state) == GP_PASSED);
07899a6e5f5613 Oleg Nesterov 2015-08-21 185
07899a6e5f5613 Oleg Nesterov 2015-08-21 186 spin_lock_irq(&rsp->rss_lock);
89da3b94bb9741 Oleg Nesterov 2019-04-25 @187 if (rsp->gp_state == GP_REPLAY)

:::::: The code at line 187 was first introduced by commit
:::::: 89da3b94bb97417ca2c5b0ce3a28643819030247 rcu/sync: Simplify the state machine

:::::: TO: Oleg Nesterov <oleg@redhat.com>
:::::: CC: Paul E. McKenney <paulmck@linux.ibm.com>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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