rcutorture: Move SRCU status printing to SRCU implementations

This commit gets rid of some ugly #ifdefs in rcutorture.c by moving
the SRCU status printing to the SRCU implementations.

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

diff --git a/include/linux/srcutiny.h b/include/linux/srcutiny.h
index cfbfc54..261471f 100644 (file)
--- a/include/linux/srcutiny.h
+++ b/include/linux/srcutiny.h
@@ -87,4 +87,17 @@ static inline void srcu_barrier(struct srcu_struct *sp)
        synchronize_srcu(sp);
 }
 
+/* Defined here to avoid size increase for non-torture kernels. */
+static inline void srcu_torture_stats_print(struct srcu_struct *sp,
+                                           char *tt, char *tf)
+{
+       int idx;
+
+       idx = READ_ONCE(sp->srcu_idx) & 0x1;
+       pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%hd,%hd)\n",
+                tt, tf, idx,
+                READ_ONCE(sp->srcu_lock_nesting[!idx]),
+                READ_ONCE(sp->srcu_lock_nesting[idx]));
+}
+
 #endif

diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h
index 42973f7..7886356 100644 (file)
--- a/include/linux/srcutree.h
+++ b/include/linux/srcutree.h
@@ -141,5 +141,6 @@ void process_srcu(struct work_struct *work);
 
 void synchronize_srcu_expedited(struct srcu_struct *sp);
 void srcu_barrier(struct srcu_struct *sp);
+void srcu_torture_stats_print(struct srcu_struct *sp, char *tt, char *tf);
 
 #endif

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index b8f7f8c..aedc8f2 100644 (file)
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -561,44 +561,7 @@ static void srcu_torture_barrier(void)
 
 static void srcu_torture_stats(void)
 {
-       int __maybe_unused cpu;
-       int idx;
-
-#ifdef CONFIG_TREE_SRCU
-       idx = srcu_ctlp->srcu_idx & 0x1;
-       pr_alert("%s%s Tree SRCU per-CPU(idx=%d):",
-                torture_type, TORTURE_FLAG, idx);
-       for_each_possible_cpu(cpu) {
-               unsigned long l0, l1;
-               unsigned long u0, u1;
-               long c0, c1;
-               struct srcu_data *counts;
-
-               counts = per_cpu_ptr(srcu_ctlp->sda, cpu);
-               u0 = counts->srcu_unlock_count[!idx];
-               u1 = counts->srcu_unlock_count[idx];
-
-               /*
-                * Make sure that a lock is always counted if the corresponding
-                * unlock is counted.
-                */
-               smp_rmb();
-
-               l0 = counts->srcu_lock_count[!idx];
-               l1 = counts->srcu_lock_count[idx];
-
-               c0 = l0 - u0;
-               c1 = l1 - u1;
-               pr_cont(" %d(%ld,%ld)", cpu, c0, c1);
-       }
-       pr_cont("\n");
-#elif defined(CONFIG_TINY_SRCU)
-       idx = READ_ONCE(srcu_ctlp->srcu_idx) & 0x1;
-       pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%hd,%hd)\n",
-                torture_type, TORTURE_FLAG, idx,
-                READ_ONCE(srcu_ctlp->srcu_lock_nesting[!idx]),
-                READ_ONCE(srcu_ctlp->srcu_lock_nesting[idx]));
-#endif
+       srcu_torture_stats_print(srcu_ctlp, torture_type, TORTURE_FLAG);
 }
 
 static void srcu_torture_synchronize_expedited(void)

diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
index d0ca524..8f6fd11 100644 (file)
--- a/kernel/rcu/srcutree.c
+++ b/kernel/rcu/srcutree.c
@@ -1217,6 +1217,40 @@ void srcutorture_get_gp_data(enum rcutorture_type test_type,
 }
 EXPORT_SYMBOL_GPL(srcutorture_get_gp_data);
 
+void srcu_torture_stats_print(struct srcu_struct *sp, char *tt, char *tf)
+{
+       int cpu;
+       int idx;
+
+       idx = sp->srcu_idx & 0x1;
+       pr_alert("%s%s Tree SRCU per-CPU(idx=%d):", tt, tf, idx);
+       for_each_possible_cpu(cpu) {
+               unsigned long l0, l1;
+               unsigned long u0, u1;
+               long c0, c1;
+               struct srcu_data *counts;
+
+               counts = per_cpu_ptr(sp->sda, cpu);
+               u0 = counts->srcu_unlock_count[!idx];
+               u1 = counts->srcu_unlock_count[idx];
+
+               /*
+                * Make sure that a lock is always counted if the corresponding
+                * unlock is counted.
+                */
+               smp_rmb();
+
+               l0 = counts->srcu_lock_count[!idx];
+               l1 = counts->srcu_lock_count[idx];
+
+               c0 = l0 - u0;
+               c1 = l1 - u1;
+               pr_cont(" %d(%ld,%ld)", cpu, c0, c1);
+       }
+       pr_cont("\n");
+}
+EXPORT_SYMBOL_GPL(srcu_torture_stats_print);
+
 static int __init srcu_bootup_announce(void)
 {
        pr_info("Hierarchical SRCU implementation.\n");