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sparc64: fix sparse warnings in perf_event.c

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Fix following sparse warnings:
kernel/perf_event.c:113:1: warning: symbol 'cpu_hw_events' was not declared. Should it be static?
kernel/perf_event.c:1156:6: warning: symbol 'perf_event_grab_pmc' was not declared. Should it be static?
kernel/perf_event.c:1172:6: warning: symbol 'perf_event_release_pmc' was not declared. Should it be static?
kernel/perf_event.c:1672:12: warning: symbol 'init_hw_perf_events' was not declared. Should it be static?
kernel/perf_event.c:1749:52: warning: incorrect type in argument 2 (different address spaces)
kernel/perf_event.c:1772:60: warning: incorrect type in argument 2 (different address spaces)
kernel/perf_event.c:1779:60: warning: incorrect type in argument 2 (different address spaces)

Define the functions static as they are not used outside this file.
Fix it so copy_from_user are supplied with pointers annotated _user

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sam Ravnborg 2014-05-16 23:26:04 +02:00 committed by David S. Miller
parent 2f827ea7ce
commit 265c1ffa59
1 changed files with 13 additions and 10 deletions
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23
arch/sparc/kernel/perf_event.c
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@ -110,7 +110,7 @@ struct cpu_hw_events {
unsigned int group_flag;
};
DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = { .enabled = 1, };
static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = { .enabled = 1, };
/* An event map describes the characteristics of a performance
* counter event. In particular it gives the encoding as well as
@ -1153,7 +1153,7 @@ static void perf_stop_nmi_watchdog(void *unused)
cpuc->pcr[i] = pcr_ops->read_pcr(i);
}
void perf_event_grab_pmc(void)
static void perf_event_grab_pmc(void)
{
if (atomic_inc_not_zero(&active_events))
return;
@ -1169,7 +1169,7 @@ void perf_event_grab_pmc(void)
mutex_unlock(&pmc_grab_mutex);
}
void perf_event_release_pmc(void)
static void perf_event_release_pmc(void)
{
if (atomic_dec_and_mutex_lock(&active_events, &pmc_grab_mutex)) {
if (atomic_read(&nmi_active) == 0)
@ -1669,7 +1669,7 @@ static bool __init supported_pmu(void)
return false;
}
int __init init_hw_perf_events(void)
static int __init init_hw_perf_events(void)
{
pr_info("Performance events: ");
@ -1742,10 +1742,11 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry,
ufp = regs->u_regs[UREG_I6] + STACK_BIAS;
do {
struct sparc_stackf *usf, sf;
struct sparc_stackf __user *usf;
struct sparc_stackf sf;
unsigned long pc;
usf = (struct sparc_stackf *) ufp;
usf = (struct sparc_stackf __user *)ufp;
if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
break;
@ -1765,17 +1766,19 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
unsigned long pc;
if (thread32_stack_is_64bit(ufp)) {
struct sparc_stackf *usf, sf;
struct sparc_stackf __user *usf;
struct sparc_stackf sf;
ufp += STACK_BIAS;
usf = (struct sparc_stackf *) ufp;
usf = (struct sparc_stackf __user *)ufp;
if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
break;
pc = sf.callers_pc & 0xffffffff;
ufp = ((unsigned long) sf.fp) & 0xffffffff;
} else {
struct sparc_stackf32 *usf, sf;
usf = (struct sparc_stackf32 *) ufp;
struct sparc_stackf32 __user *usf;
struct sparc_stackf32 sf;
usf = (struct sparc_stackf32 __user *)ufp;
if (__copy_from_user_inatomic(&sf, usf, sizeof(sf)))
break;
pc = sf.callers_pc;