rcu: Make rcu_gp_init() be bool rather than int

The return value from rcu_gp_init() is always used as a bool, so
this commit makes it be a bool.

Reported-by: Iftekhar Ahmed <ahmedi@oregonstate.edu>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 87b604d..01a90a3 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1814,9 +1814,9 @@ static void rcu_gp_slow(struct rcu_state *rsp, int delay)
 }
 
 /*
- * Initialize a new grace period.  Return 0 if no grace period required.
+ * Initialize a new grace period.  Return false if no grace period required.
  */
-static int rcu_gp_init(struct rcu_state *rsp)
+static bool rcu_gp_init(struct rcu_state *rsp)
 {
        unsigned long oldmask;
        struct rcu_data *rdp;
@@ -1827,7 +1827,7 @@ static int rcu_gp_init(struct rcu_state *rsp)
        if (!READ_ONCE(rsp->gp_flags)) {
                /* Spurious wakeup, tell caller to go back to sleep.  */
                raw_spin_unlock_irq(&rnp->lock);
-               return 0;
+               return false;
        }
        WRITE_ONCE(rsp->gp_flags, 0); /* Clear all flags: New grace period. */
 
@@ -1837,7 +1837,7 @@ static int rcu_gp_init(struct rcu_state *rsp)
                 * Not supposed to be able to happen.
                 */
                raw_spin_unlock_irq(&rnp->lock);
-               return 0;
+               return false;
        }
 
        /* Advance to a new grace period and initialize state. */
@@ -1929,7 +1929,7 @@ static int rcu_gp_init(struct rcu_state *rsp)
                WRITE_ONCE(rsp->gp_activity, jiffies);
        }
 
-       return 1;
+       return true;
 }
 
 /*