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-rw-r--r--include/trace/events/iocost.h2
-rw-r--r--kernel/trace/Kconfig3
-rw-r--r--kernel/trace/trace.c11
-rw-r--r--kernel/trace/trace_events_hist.c2
-rw-r--r--samples/fprobe/fprobe_example.c2
-rw-r--r--samples/kprobes/kprobe_example.c5
-rw-r--r--samples/kprobes/kretprobe_example.c5
7 files changed, 16 insertions, 14 deletions
diff --git a/include/trace/events/iocost.h b/include/trace/events/iocost.h
index e282ce02fa2d..6d1626e7a4ce 100644
--- a/include/trace/events/iocost.h
+++ b/include/trace/events/iocost.h
@@ -160,7 +160,7 @@ TRACE_EVENT(iocost_ioc_vrate_adj,
TP_fast_assign(
__assign_str(devname, ioc_name(ioc));
- __entry->old_vrate = atomic64_read(&ioc->vtime_rate);;
+ __entry->old_vrate = atomic64_read(&ioc->vtime_rate);
__entry->new_vrate = new_vrate;
__entry->busy_level = ioc->busy_level;
__entry->read_missed_ppm = missed_ppm[READ];
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index debbbb083286..ccd6a5ade3e9 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -194,7 +194,8 @@ config FUNCTION_TRACER
sequence is then dynamically patched into a tracer call when
tracing is enabled by the administrator. If it's runtime disabled
(the bootup default), then the overhead of the instructions is very
- small and not measurable even in micro-benchmarks.
+ small and not measurable even in micro-benchmarks (at least on
+ x86, but may have impact on other architectures).
config FUNCTION_GRAPH_TRACER
bool "Kernel Function Graph Tracer"
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a8cfac0611bc..b8dd54627075 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -9864,6 +9864,12 @@ void trace_init_global_iter(struct trace_iterator *iter)
/* Output in nanoseconds only if we are using a clock in nanoseconds. */
if (trace_clocks[iter->tr->clock_id].in_ns)
iter->iter_flags |= TRACE_FILE_TIME_IN_NS;
+
+ /* Can not use kmalloc for iter.temp and iter.fmt */
+ iter->temp = static_temp_buf;
+ iter->temp_size = STATIC_TEMP_BUF_SIZE;
+ iter->fmt = static_fmt_buf;
+ iter->fmt_size = STATIC_FMT_BUF_SIZE;
}
void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
@@ -9896,11 +9902,6 @@ void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
/* Simulate the iterator */
trace_init_global_iter(&iter);
- /* Can not use kmalloc for iter.temp and iter.fmt */
- iter.temp = static_temp_buf;
- iter.temp_size = STATIC_TEMP_BUF_SIZE;
- iter.fmt = static_fmt_buf;
- iter.fmt_size = STATIC_FMT_BUF_SIZE;
for_each_tracing_cpu(cpu) {
atomic_inc(&per_cpu_ptr(iter.array_buffer->data, cpu)->disabled);
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 48e82e141d54..e87a46794079 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -4430,6 +4430,8 @@ static int parse_var_defs(struct hist_trigger_data *hist_data)
s = kstrdup(field_str, GFP_KERNEL);
if (!s) {
+ kfree(hist_data->attrs->var_defs.name[n_vars]);
+ hist_data->attrs->var_defs.name[n_vars] = NULL;
ret = -ENOMEM;
goto free;
}
diff --git a/samples/fprobe/fprobe_example.c b/samples/fprobe/fprobe_example.c
index 18b1e5c4b431..e22da8573116 100644
--- a/samples/fprobe/fprobe_example.c
+++ b/samples/fprobe/fprobe_example.c
@@ -20,7 +20,7 @@
#define BACKTRACE_DEPTH 16
#define MAX_SYMBOL_LEN 4096
-struct fprobe sample_probe;
+static struct fprobe sample_probe;
static unsigned long nhit;
static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
diff --git a/samples/kprobes/kprobe_example.c b/samples/kprobes/kprobe_example.c
index f991a66b5b02..fd346f58ddba 100644
--- a/samples/kprobes/kprobe_example.c
+++ b/samples/kprobes/kprobe_example.c
@@ -16,9 +16,8 @@
#include <linux/module.h>
#include <linux/kprobes.h>
-#define MAX_SYMBOL_LEN 64
-static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
-module_param_string(symbol, symbol, sizeof(symbol), 0644);
+static char symbol[KSYM_NAME_LEN] = "kernel_clone";
+module_param_string(symbol, symbol, KSYM_NAME_LEN, 0644);
/* For each probe you need to allocate a kprobe structure */
static struct kprobe kp = {
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c
index 228321ecb161..cbf16542d84e 100644
--- a/samples/kprobes/kretprobe_example.c
+++ b/samples/kprobes/kretprobe_example.c
@@ -23,11 +23,10 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/ktime.h>
-#include <linux/limits.h>
#include <linux/sched.h>
-static char func_name[NAME_MAX] = "kernel_clone";
-module_param_string(func, func_name, NAME_MAX, S_IRUGO);
+static char func_name[KSYM_NAME_LEN] = "kernel_clone";
+module_param_string(func, func_name, KSYM_NAME_LEN, 0644);
MODULE_PARM_DESC(func, "Function to kretprobe; this module will report the"
" function's execution time");