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Diffstat (limited to 'kernel/rcu/refscale.c')
-rw-r--r--kernel/rcu/refscale.c67
1 files changed, 35 insertions, 32 deletions
diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c
index f4ea5b1ec068..0db9db73f57f 100644
--- a/kernel/rcu/refscale.c
+++ b/kernel/rcu/refscale.c
@@ -28,6 +28,7 @@
#include <linux/rcupdate_trace.h>
#include <linux/reboot.h>
#include <linux/sched.h>
+#include <linux/seq_buf.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/stat.h>
@@ -134,7 +135,7 @@ struct ref_scale_ops {
const char *name;
};
-static struct ref_scale_ops *cur_ops;
+static const struct ref_scale_ops *cur_ops;
static void un_delay(const int udl, const int ndl)
{
@@ -170,7 +171,7 @@ static bool rcu_sync_scale_init(void)
return true;
}
-static struct ref_scale_ops rcu_ops = {
+static const struct ref_scale_ops rcu_ops = {
.init = rcu_sync_scale_init,
.readsection = ref_rcu_read_section,
.delaysection = ref_rcu_delay_section,
@@ -204,7 +205,7 @@ static void srcu_ref_scale_delay_section(const int nloops, const int udl, const
}
}
-static struct ref_scale_ops srcu_ops = {
+static const struct ref_scale_ops srcu_ops = {
.init = rcu_sync_scale_init,
.readsection = srcu_ref_scale_read_section,
.delaysection = srcu_ref_scale_delay_section,
@@ -231,7 +232,7 @@ static void rcu_tasks_ref_scale_delay_section(const int nloops, const int udl, c
un_delay(udl, ndl);
}
-static struct ref_scale_ops rcu_tasks_ops = {
+static const struct ref_scale_ops rcu_tasks_ops = {
.init = rcu_sync_scale_init,
.readsection = rcu_tasks_ref_scale_read_section,
.delaysection = rcu_tasks_ref_scale_delay_section,
@@ -270,7 +271,7 @@ static void rcu_trace_ref_scale_delay_section(const int nloops, const int udl, c
}
}
-static struct ref_scale_ops rcu_trace_ops = {
+static const struct ref_scale_ops rcu_trace_ops = {
.init = rcu_sync_scale_init,
.readsection = rcu_trace_ref_scale_read_section,
.delaysection = rcu_trace_ref_scale_delay_section,
@@ -309,7 +310,7 @@ static void ref_refcnt_delay_section(const int nloops, const int udl, const int
}
}
-static struct ref_scale_ops refcnt_ops = {
+static const struct ref_scale_ops refcnt_ops = {
.init = rcu_sync_scale_init,
.readsection = ref_refcnt_section,
.delaysection = ref_refcnt_delay_section,
@@ -346,7 +347,7 @@ static void ref_rwlock_delay_section(const int nloops, const int udl, const int
}
}
-static struct ref_scale_ops rwlock_ops = {
+static const struct ref_scale_ops rwlock_ops = {
.init = ref_rwlock_init,
.readsection = ref_rwlock_section,
.delaysection = ref_rwlock_delay_section,
@@ -383,7 +384,7 @@ static void ref_rwsem_delay_section(const int nloops, const int udl, const int n
}
}
-static struct ref_scale_ops rwsem_ops = {
+static const struct ref_scale_ops rwsem_ops = {
.init = ref_rwsem_init,
.readsection = ref_rwsem_section,
.delaysection = ref_rwsem_delay_section,
@@ -418,7 +419,7 @@ static void ref_lock_delay_section(const int nloops, const int udl, const int nd
preempt_enable();
}
-static struct ref_scale_ops lock_ops = {
+static const struct ref_scale_ops lock_ops = {
.readsection = ref_lock_section,
.delaysection = ref_lock_delay_section,
.name = "lock"
@@ -453,7 +454,7 @@ static void ref_lock_irq_delay_section(const int nloops, const int udl, const in
preempt_enable();
}
-static struct ref_scale_ops lock_irq_ops = {
+static const struct ref_scale_ops lock_irq_ops = {
.readsection = ref_lock_irq_section,
.delaysection = ref_lock_irq_delay_section,
.name = "lock-irq"
@@ -489,7 +490,7 @@ static void ref_acqrel_delay_section(const int nloops, const int udl, const int
preempt_enable();
}
-static struct ref_scale_ops acqrel_ops = {
+static const struct ref_scale_ops acqrel_ops = {
.readsection = ref_acqrel_section,
.delaysection = ref_acqrel_delay_section,
.name = "acqrel"
@@ -523,7 +524,7 @@ static void ref_clock_delay_section(const int nloops, const int udl, const int n
stopopts = x;
}
-static struct ref_scale_ops clock_ops = {
+static const struct ref_scale_ops clock_ops = {
.readsection = ref_clock_section,
.delaysection = ref_clock_delay_section,
.name = "clock"
@@ -555,7 +556,7 @@ static void ref_jiffies_delay_section(const int nloops, const int udl, const int
stopopts = x;
}
-static struct ref_scale_ops jiffies_ops = {
+static const struct ref_scale_ops jiffies_ops = {
.readsection = ref_jiffies_section,
.delaysection = ref_jiffies_delay_section,
.name = "jiffies"
@@ -705,9 +706,9 @@ static void refscale_typesafe_ctor(void *rtsp_in)
preempt_enable();
}
-static struct ref_scale_ops typesafe_ref_ops;
-static struct ref_scale_ops typesafe_lock_ops;
-static struct ref_scale_ops typesafe_seqlock_ops;
+static const struct ref_scale_ops typesafe_ref_ops;
+static const struct ref_scale_ops typesafe_lock_ops;
+static const struct ref_scale_ops typesafe_seqlock_ops;
// Initialize for a typesafe test.
static bool typesafe_init(void)
@@ -768,7 +769,7 @@ static void typesafe_cleanup(void)
}
// The typesafe_init() function distinguishes these structures by address.
-static struct ref_scale_ops typesafe_ref_ops = {
+static const struct ref_scale_ops typesafe_ref_ops = {
.init = typesafe_init,
.cleanup = typesafe_cleanup,
.readsection = typesafe_read_section,
@@ -776,7 +777,7 @@ static struct ref_scale_ops typesafe_ref_ops = {
.name = "typesafe_ref"
};
-static struct ref_scale_ops typesafe_lock_ops = {
+static const struct ref_scale_ops typesafe_lock_ops = {
.init = typesafe_init,
.cleanup = typesafe_cleanup,
.readsection = typesafe_read_section,
@@ -784,7 +785,7 @@ static struct ref_scale_ops typesafe_lock_ops = {
.name = "typesafe_lock"
};
-static struct ref_scale_ops typesafe_seqlock_ops = {
+static const struct ref_scale_ops typesafe_seqlock_ops = {
.init = typesafe_init,
.cleanup = typesafe_cleanup,
.readsection = typesafe_read_section,
@@ -891,32 +892,34 @@ static u64 process_durations(int n)
{
int i;
struct reader_task *rt;
- char buf1[64];
+ struct seq_buf s;
char *buf;
u64 sum = 0;
buf = kmalloc(800 + 64, GFP_KERNEL);
if (!buf)
return 0;
- buf[0] = 0;
- sprintf(buf, "Experiment #%d (Format: <THREAD-NUM>:<Total loop time in ns>)",
- exp_idx);
+ seq_buf_init(&s, buf, 800 + 64);
+
+ seq_buf_printf(&s, "Experiment #%d (Format: <THREAD-NUM>:<Total loop time in ns>)",
+ exp_idx);
for (i = 0; i < n && !torture_must_stop(); i++) {
rt = &(reader_tasks[i]);
- sprintf(buf1, "%d: %llu\t", i, rt->last_duration_ns);
if (i % 5 == 0)
- strcat(buf, "\n");
- if (strlen(buf) >= 800) {
- pr_alert("%s", buf);
- buf[0] = 0;
+ seq_buf_putc(&s, '\n');
+
+ if (seq_buf_used(&s) >= 800) {
+ pr_alert("%s", seq_buf_str(&s));
+ seq_buf_clear(&s);
}
- strcat(buf, buf1);
+
+ seq_buf_printf(&s, "%d: %llu\t", i, rt->last_duration_ns);
sum += rt->last_duration_ns;
}
- pr_alert("%s\n", buf);
+ pr_alert("%s\n", seq_buf_str(&s));
kfree(buf);
return sum;
@@ -1023,7 +1026,7 @@ end:
}
static void
-ref_scale_print_module_parms(struct ref_scale_ops *cur_ops, const char *tag)
+ref_scale_print_module_parms(const struct ref_scale_ops *cur_ops, const char *tag)
{
pr_alert("%s" SCALE_FLAG
"--- %s: verbose=%d verbose_batched=%d shutdown=%d holdoff=%d lookup_instances=%ld loops=%ld nreaders=%d nruns=%d readdelay=%d\n", scale_type, tag,
@@ -1078,7 +1081,7 @@ ref_scale_init(void)
{
long i;
int firsterr = 0;
- static struct ref_scale_ops *scale_ops[] = {
+ static const struct ref_scale_ops *scale_ops[] = {
&rcu_ops, &srcu_ops, RCU_TRACE_OPS RCU_TASKS_OPS &refcnt_ops, &rwlock_ops,
&rwsem_ops, &lock_ops, &lock_irq_ops, &acqrel_ops, &clock_ops, &jiffies_ops,
&typesafe_ref_ops, &typesafe_lock_ops, &typesafe_seqlock_ops,
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-22 13:37:56 +0000