rcu: Make cpu_needs_another_gp() be bool

The cpu_needs_another_gp() function is currently of type int, but only
returns zero or one.  Bow to reality and make it be of type bool.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 9a4c8c0..d6863bc 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -597,25 +597,25 @@ static int rcu_future_needs_gp(struct rcu_state *rsp)
  * The caller must have disabled interrupts to prevent races with
  * normal callback registry.
  */
-static int
+static bool
 cpu_needs_another_gp(struct rcu_state *rsp, struct rcu_data *rdp)
 {
        int i;
 
        if (rcu_gp_in_progress(rsp))
-               return 0;  /* No, a grace period is already in progress. */
+               return false;  /* No, a grace period is already in progress. */
        if (rcu_future_needs_gp(rsp))
-               return 1;  /* Yes, a no-CBs CPU needs one. */
+               return true;  /* Yes, a no-CBs CPU needs one. */
        if (!rdp->nxttail[RCU_NEXT_TAIL])
-               return 0;  /* No, this is a no-CBs (or offline) CPU. */
+               return false;  /* No, this is a no-CBs (or offline) CPU. */
        if (*rdp->nxttail[RCU_NEXT_READY_TAIL])
-               return 1;  /* Yes, this CPU has newly registered callbacks. */
+               return true;  /* Yes, CPU has newly registered callbacks. */
        for (i = RCU_WAIT_TAIL; i < RCU_NEXT_TAIL; i++)
                if (rdp->nxttail[i - 1] != rdp->nxttail[i] &&
                    ULONG_CMP_LT(READ_ONCE(rsp->completed),
                                 rdp->nxtcompleted[i]))
-                       return 1;  /* Yes, CBs for future grace period. */
-       return 0; /* No grace period needed. */
+                       return true;  /* Yes, CBs for future grace period. */
+       return false; /* No grace period needed. */
 }
 
 /*