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    Subject[PATCH tip/core/rcu 14/15] rcu: Use for_each_rcu_flavor() in TREE_RCU tracing
    Date
    From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>

    This commit applies the new for_each_rcu_flavor() macro to the
    kernel/rcutree_trace.c file.

    Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    ---
    kernel/rcutree_trace.c | 95 +++++++++++++++++++-----------------------------
    1 files changed, 38 insertions(+), 57 deletions(-)

    diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
    index 057408b..c618665 100644
    --- a/kernel/rcutree_trace.c
    +++ b/kernel/rcutree_trace.c
    @@ -48,22 +48,18 @@

    static void print_rcubarrier(struct seq_file *m, struct rcu_state *rsp)
    {
    - seq_printf(m, "%c bcc: %d nbd: %lu\n",
    - rsp->rcu_barrier_in_progress ? 'B' : '.',
    + seq_printf(m, "%s: %c bcc: %d nbd: %lu\n",
    + rsp->name, rsp->rcu_barrier_in_progress ? 'B' : '.',
    atomic_read(&rsp->barrier_cpu_count),
    rsp->n_barrier_done);
    }

    static int show_rcubarrier(struct seq_file *m, void *unused)
    {
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - seq_puts(m, "rcu_preempt: ");
    - print_rcubarrier(m, &rcu_preempt_state);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - seq_puts(m, "rcu_sched: ");
    - print_rcubarrier(m, &rcu_sched_state);
    - seq_puts(m, "rcu_bh: ");
    - print_rcubarrier(m, &rcu_bh_state);
    + struct rcu_state *rsp;
    +
    + for_each_rcu_flavor(rsp)
    + print_rcubarrier(m, rsp);
    return 0;
    }

    @@ -129,24 +125,16 @@ static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp)
    rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted);
    }

    -#define PRINT_RCU_DATA(name, func, m) \
    - do { \
    - int _p_r_d_i; \
    - \
    - for_each_possible_cpu(_p_r_d_i) \
    - func(m, &per_cpu(name, _p_r_d_i)); \
    - } while (0)
    -
    static int show_rcudata(struct seq_file *m, void *unused)
    {
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - seq_puts(m, "rcu_preempt:\n");
    - PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data, m);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - seq_puts(m, "rcu_sched:\n");
    - PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data, m);
    - seq_puts(m, "rcu_bh:\n");
    - PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data, m);
    + int cpu;
    + struct rcu_state *rsp;
    +
    + for_each_rcu_flavor(rsp) {
    + seq_printf(m, "%s:\n", rsp->name);
    + for_each_possible_cpu(cpu)
    + print_one_rcu_data(m, per_cpu_ptr(rsp->rda, cpu));
    + }
    return 0;
    }

    @@ -200,6 +188,9 @@ static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp)

    static int show_rcudata_csv(struct seq_file *m, void *unused)
    {
    + int cpu;
    + struct rcu_state *rsp;
    +
    seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pgp\",\"pq\",");
    seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\",");
    seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\"");
    @@ -207,14 +198,11 @@ static int show_rcudata_csv(struct seq_file *m, void *unused)
    seq_puts(m, "\"kt\",\"ktl\"");
    #endif /* #ifdef CONFIG_RCU_BOOST */
    seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n");
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - seq_puts(m, "\"rcu_preempt:\"\n");
    - PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data_csv, m);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - seq_puts(m, "\"rcu_sched:\"\n");
    - PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data_csv, m);
    - seq_puts(m, "\"rcu_bh:\"\n");
    - PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data_csv, m);
    + for_each_rcu_flavor(rsp) {
    + seq_printf(m, "\"%s:\"\n", rsp->name);
    + for_each_possible_cpu(cpu)
    + print_one_rcu_data_csv(m, per_cpu_ptr(rsp->rda, cpu));
    + }
    return 0;
    }

    @@ -304,9 +292,9 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
    struct rcu_node *rnp;

    gpnum = rsp->gpnum;
    - seq_printf(m, "c=%lu g=%lu s=%d jfq=%ld j=%x "
    + seq_printf(m, "%s: c=%lu g=%lu s=%d jfq=%ld j=%x "
    "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld/%ld\n",
    - rsp->completed, gpnum, rsp->fqs_state,
    + rsp->name, rsp->completed, gpnum, rsp->fqs_state,
    (long)(rsp->jiffies_force_qs - jiffies),
    (int)(jiffies & 0xffff),
    rsp->n_force_qs, rsp->n_force_qs_ngp,
    @@ -329,14 +317,10 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)

    static int show_rcuhier(struct seq_file *m, void *unused)
    {
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - seq_puts(m, "rcu_preempt:\n");
    - print_one_rcu_state(m, &rcu_preempt_state);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - seq_puts(m, "rcu_sched:\n");
    - print_one_rcu_state(m, &rcu_sched_state);
    - seq_puts(m, "rcu_bh:\n");
    - print_one_rcu_state(m, &rcu_bh_state);
    + struct rcu_state *rsp;
    +
    + for_each_rcu_flavor(rsp)
    + print_one_rcu_state(m, rsp);
    return 0;
    }

    @@ -377,11 +361,10 @@ static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp)

    static int show_rcugp(struct seq_file *m, void *unused)
    {
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - show_one_rcugp(m, &rcu_preempt_state);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - show_one_rcugp(m, &rcu_sched_state);
    - show_one_rcugp(m, &rcu_bh_state);
    + struct rcu_state *rsp;
    +
    + for_each_rcu_flavor(rsp)
    + show_one_rcugp(m, rsp);
    return 0;
    }

    @@ -430,14 +413,12 @@ static void print_rcu_pendings(struct seq_file *m, struct rcu_state *rsp)

    static int show_rcu_pending(struct seq_file *m, void *unused)
    {
    -#ifdef CONFIG_TREE_PREEMPT_RCU
    - seq_puts(m, "rcu_preempt:\n");
    - print_rcu_pendings(m, &rcu_preempt_state);
    -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
    - seq_puts(m, "rcu_sched:\n");
    - print_rcu_pendings(m, &rcu_sched_state);
    - seq_puts(m, "rcu_bh:\n");
    - print_rcu_pendings(m, &rcu_bh_state);
    + struct rcu_state *rsp;
    +
    + for_each_rcu_flavor(rsp) {
    + seq_printf(m, "%s:\n", rsp->name);
    + print_rcu_pendings(m, rsp);
    + }
    return 0;
    }

    --
    1.7.8


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