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rcu: Consolidate rcutiny_plugin.h ifdefs
This commit rearranges code in order to allow ifdefs to be consolidated in kernel/rcutiny_plugin.h, simplifying the code. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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1 changed files with 40 additions and 46 deletions
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@ -53,54 +53,10 @@ static struct rcu_ctrlblk rcu_bh_ctrlblk = {
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};
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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#include <linux/kernel_stat.h>
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int rcu_scheduler_active __read_mostly;
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EXPORT_SYMBOL_GPL(rcu_scheduler_active);
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#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
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#ifdef CONFIG_RCU_TRACE
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static void check_cpu_stall(struct rcu_ctrlblk *rcp)
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{
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unsigned long j;
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unsigned long js;
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if (rcu_cpu_stall_suppress)
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return;
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rcp->ticks_this_gp++;
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j = jiffies;
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js = rcp->jiffies_stall;
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if (*rcp->curtail && ULONG_CMP_GE(j, js)) {
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pr_err("INFO: %s stall on CPU (%lu ticks this GP) idle=%llx (t=%lu jiffies q=%ld)\n",
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rcp->name, rcp->ticks_this_gp, rcu_dynticks_nesting,
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jiffies - rcp->gp_start, rcp->qlen);
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dump_stack();
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}
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if (*rcp->curtail && ULONG_CMP_GE(j, js))
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rcp->jiffies_stall = jiffies +
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3 * rcu_jiffies_till_stall_check() + 3;
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else if (ULONG_CMP_GE(j, js))
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rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
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}
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#endif /* #ifdef CONFIG_RCU_TRACE */
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static void reset_cpu_stall_ticks(struct rcu_ctrlblk *rcp)
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{
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#ifdef CONFIG_RCU_TRACE
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rcp->ticks_this_gp = 0;
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rcp->gp_start = jiffies;
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rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
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#endif /* #ifdef CONFIG_RCU_TRACE */
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}
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static void check_cpu_stalls(void)
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{
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RCU_TRACE(check_cpu_stall(&rcu_bh_ctrlblk));
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RCU_TRACE(check_cpu_stall(&rcu_sched_ctrlblk));
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}
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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#include <linux/kernel_stat.h>
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/*
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* During boot, we forgive RCU lockdep issues. After this function is
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@ -179,4 +135,42 @@ MODULE_AUTHOR("Paul E. McKenney");
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MODULE_DESCRIPTION("Read-Copy Update tracing for tiny implementation");
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MODULE_LICENSE("GPL");
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static void check_cpu_stall(struct rcu_ctrlblk *rcp)
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{
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unsigned long j;
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unsigned long js;
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if (rcu_cpu_stall_suppress)
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return;
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rcp->ticks_this_gp++;
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j = jiffies;
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js = rcp->jiffies_stall;
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if (*rcp->curtail && ULONG_CMP_GE(j, js)) {
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pr_err("INFO: %s stall on CPU (%lu ticks this GP) idle=%llx (t=%lu jiffies q=%ld)\n",
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rcp->name, rcp->ticks_this_gp, rcu_dynticks_nesting,
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jiffies - rcp->gp_start, rcp->qlen);
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dump_stack();
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}
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if (*rcp->curtail && ULONG_CMP_GE(j, js))
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rcp->jiffies_stall = jiffies +
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3 * rcu_jiffies_till_stall_check() + 3;
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else if (ULONG_CMP_GE(j, js))
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rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
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}
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#endif /* #ifdef CONFIG_RCU_TRACE */
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static void reset_cpu_stall_ticks(struct rcu_ctrlblk *rcp)
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{
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#ifdef CONFIG_RCU_TRACE
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rcp->ticks_this_gp = 0;
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rcp->gp_start = jiffies;
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rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
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#endif /* #ifdef CONFIG_RCU_TRACE */
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}
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static void check_cpu_stalls(void)
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{
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RCU_TRACE(check_cpu_stall(&rcu_bh_ctrlblk));
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RCU_TRACE(check_cpu_stall(&rcu_sched_ctrlblk));
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}
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