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ftrace: Cleanup of global variables ftrace_new_pgs and ftrace_update_cnt 

Some of them can be local to functions, so make them local and pass
them as parameters where needed:
* __start_mcount_loc+__stop_mcount_loc are local to ftrace_init
* ftrace_new_pgs -> new_pgs/start_pg
* ftrace_update_cnt -> local update_cnt in ftrace_update_code

Link: http://lkml.kernel.org/r/1393268401-24379-1-git-send-email-jslaby@suse.cz

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Slaby 2014-02-24 19:59:56 +01:00 коммит произвёл Steven Rostedt
Родитель 114e7b52de
Коммит 1dc43cf0be
1 изменённых файлов: 8 добавлений и 17 удалений
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25
kernel/trace/ftrace.c
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@ -1174,8 +1174,6 @@ struct ftrace_page {
int size;
};
static struct ftrace_page *ftrace_new_pgs;
#define ENTRY_SIZE sizeof(struct dyn_ftrace)
#define ENTRIES_PER_PAGE (PAGE_SIZE / ENTRY_SIZE)
@ -2246,7 +2244,6 @@ static void ftrace_shutdown_sysctl(void)
}
static cycle_t ftrace_update_time;
static unsigned long ftrace_update_cnt;
unsigned long ftrace_update_tot_cnt;
static inline int ops_traces_mod(struct ftrace_ops *ops)
@ -2302,11 +2299,12 @@ static int referenced_filters(struct dyn_ftrace *rec)
return cnt;
}
static int ftrace_update_code(struct module *mod)
static int ftrace_update_code(struct module *mod, struct ftrace_page *new_pgs)
{
struct ftrace_page *pg;
struct dyn_ftrace *p;
cycle_t start, stop;
unsigned long update_cnt = 0;
unsigned long ref = 0;
bool test = false;
int i;
@ -2332,9 +2330,8 @@ static int ftrace_update_code(struct module *mod)
}
start = ftrace_now(raw_smp_processor_id());
ftrace_update_cnt = 0;
for (pg = ftrace_new_pgs; pg; pg = pg->next) {
for (pg = new_pgs; pg; pg = pg->next) {
for (i = 0; i < pg->index; i++) {
int cnt = ref;
@ -2355,7 +2352,7 @@ static int ftrace_update_code(struct module *mod)
if (!ftrace_code_disable(mod, p))
break;
ftrace_update_cnt++;
update_cnt++;
/*
* If the tracing is enabled, go ahead and enable the record.
@ -2374,11 +2371,9 @@ static int ftrace_update_code(struct module *mod)
}
}
ftrace_new_pgs = NULL;
stop = ftrace_now(raw_smp_processor_id());
ftrace_update_time = stop - start;
ftrace_update_tot_cnt += ftrace_update_cnt;
ftrace_update_tot_cnt += update_cnt;
return 0;
}
@ -4270,9 +4265,6 @@ static int ftrace_process_locs(struct module *mod,
/* Assign the last page to ftrace_pages */
ftrace_pages = pg;
/* These new locations need to be initialized */
ftrace_new_pgs = start_pg;
/*
* We only need to disable interrupts on start up
* because we are modifying code that an interrupt
@ -4283,7 +4275,7 @@ static int ftrace_process_locs(struct module *mod,
*/
if (!mod)
local_irq_save(flags);
ftrace_update_code(mod);
ftrace_update_code(mod, start_pg);
if (!mod)
local_irq_restore(flags);
ret = 0;
@ -4392,11 +4384,10 @@ struct notifier_block ftrace_module_exit_nb = {
.priority = INT_MIN, /* Run after anything that can remove kprobes */
};
extern unsigned long __start_mcount_loc[];
extern unsigned long __stop_mcount_loc[];
void __init ftrace_init(void)
{
extern unsigned long __start_mcount_loc[];
extern unsigned long __stop_mcount_loc[];
unsigned long count, addr, flags;
int ret;