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samples: ftrace: Make some global variables static

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smatch reports this representative issue
samples/ftrace/ftrace-ops.c:15:14: warning: symbol 'nr_function_calls' was not declared. Should it be static?

The nr_functions_calls and several other global variables are only
used in ftrace-ops.c, so they should be static.
Remove the instances of initializing static int to 0.

Link: https://lore.kernel.org/linux-trace-kernel/20230130193708.1378108-1-trix@redhat.com

Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Tom Rix 2023-01-30 11:37:08 -08:00 committed by Steven Rostedt (Google)
parent f94fe7048a
commit aef70ebd62
1 changed files with 12 additions and 12 deletions
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24
samples/ftrace/ftrace-ops.c
View File

@ -12,7 +12,7 @@
* Arbitrary large value chosen to be sufficiently large to minimize noise but
* sufficiently small to complete quickly.
*/
unsigned int nr_function_calls = 100000;
static unsigned int nr_function_calls = 100000;
module_param(nr_function_calls, uint, 0);
MODULE_PARM_DESC(nr_function_calls, "How many times to call the relevant tracee");
@ -21,7 +21,7 @@ MODULE_PARM_DESC(nr_function_calls, "How many times to call the relevant tracee"
* be called directly or whether it's necessary to go via the list func, which
* can be significantly more expensive.
*/
unsigned int nr_ops_relevant = 1;
static unsigned int nr_ops_relevant = 1;
module_param(nr_ops_relevant, uint, 0);
MODULE_PARM_DESC(nr_ops_relevant, "How many ftrace_ops to associate with the relevant tracee");
@ -30,7 +30,7 @@ MODULE_PARM_DESC(nr_ops_relevant, "How many ftrace_ops to associate with the rel
* tracers enabled for distinct functions can force the use of the list func
* and incur overhead for all call sites.
*/
unsigned int nr_ops_irrelevant = 0;
static unsigned int nr_ops_irrelevant;
module_param(nr_ops_irrelevant, uint, 0);
MODULE_PARM_DESC(nr_ops_irrelevant, "How many ftrace_ops to associate with the irrelevant tracee");
@ -38,15 +38,15 @@ MODULE_PARM_DESC(nr_ops_irrelevant, "How many ftrace_ops to associate with the i
* On architectures with DYNAMIC_FTRACE_WITH_REGS, saving the full pt_regs can
* be more expensive than only saving the minimal necessary regs.
*/
bool save_regs = false;
static bool save_regs;
module_param(save_regs, bool, 0);
MODULE_PARM_DESC(save_regs, "Register ops with FTRACE_OPS_FL_SAVE_REGS (save all registers in the trampoline)");
bool assist_recursion = false;
static bool assist_recursion;
module_param(assist_recursion, bool, 0);
MODULE_PARM_DESC(assist_reursion, "Register ops with FTRACE_OPS_FL_RECURSION");
bool assist_rcu = false;
static bool assist_rcu;
module_param(assist_rcu, bool, 0);
MODULE_PARM_DESC(assist_reursion, "Register ops with FTRACE_OPS_FL_RCU");
@ -55,7 +55,7 @@ MODULE_PARM_DESC(assist_reursion, "Register ops with FTRACE_OPS_FL_RCU");
* overhead. Sometimes a consistency check using a more expensive tracer is
* desireable.
*/
bool check_count = false;
static bool check_count;
module_param(check_count, bool, 0);
MODULE_PARM_DESC(check_count, "Check that tracers are called the expected number of times\n");
@ -64,7 +64,7 @@ MODULE_PARM_DESC(check_count, "Check that tracers are called the expected number
* runs, but sometimes it can be useful to leave them registered so that they
* can be inspected through the tracefs 'enabled_functions' file.
*/
bool persist = false;
static bool persist;
module_param(persist, bool, 0);
MODULE_PARM_DESC(persist, "Successfully load module and leave ftrace ops registered after test completes\n");
@ -114,8 +114,8 @@ static void ops_func_count(unsigned long ip, unsigned long parent_ip,
self->count++;
}
struct sample_ops *ops_relevant;
struct sample_ops *ops_irrelevant;
static struct sample_ops *ops_relevant;
static struct sample_ops *ops_irrelevant;
static struct sample_ops *ops_alloc_init(void *tracee, ftrace_func_t func,
unsigned long flags, int nr)
@ -163,8 +163,8 @@ static void ops_check(struct sample_ops *ops, int nr,
}
}
ftrace_func_t tracer_relevant = ops_func_nop;
ftrace_func_t tracer_irrelevant = ops_func_nop;
static ftrace_func_t tracer_relevant = ops_func_nop;
static ftrace_func_t tracer_irrelevant = ops_func_nop;
static int __init ftrace_ops_sample_init(void)
{