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rcu-tasks: Fix warning for unused tasks_rcu_exit_srcu 

The tasks_rcu_exit_srcu variable is used only by kernels built
with CONFIG_TASKS_RCU=y, but is defined for all kernesl with
CONFIG_TASKS_RCU_GENERIC=y.  Therefore, in kernels built with
CONFIG_TASKS_RCU_GENERIC=y but CONFIG_TASKS_RCU=n, this gives
a "defined but not used" warning.

This commit therefore moves this variable under CONFIG_TASKS_RCU.

Link: https://lore.kernel.org/oe-kbuild-all/202303191536.XzMSyzTl-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Tested-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2023-03-19 17:29:20 -07:00
parent fe15c26ee2
commit 2b4be54830
1 changed files with 2 additions and 0 deletions
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2
kernel/rcu/tasks.h
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@ -136,8 +136,10 @@ static struct rcu_tasks rt_name = \
.kname = #rt_name, \
}
#ifdef CONFIG_TASKS_RCU
/* Track exiting tasks in order to allow them to be waited for. */
DEFINE_STATIC_SRCU(tasks_rcu_exit_srcu);
#endif
/* Avoid IPIing CPUs early in the grace period. */
#define RCU_TASK_IPI_DELAY (IS_ENABLED(CONFIG_TASKS_TRACE_RCU_READ_MB) ? HZ / 2 : 0)