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Subject[PATCH] smp/up: Modify the 'wait' variable from 'int' to 'bool'
Date
In smp_call_function_single() and its caller,the 'wait' variable is only
0 and 1,a bool is a more appropriate definition.

Fix kernel/up.c: when CONFIG_SMP is not set
>>kernel/up.c:12:5: error: conflicting types for 'smp_call_function_single'
12 | int smp_call_function_single(int cpu, void (*func) (void *info),
void *info,
>> kernel/up.c:39:6: error: conflicting types for 'on_each_cpu'
39 | void on_each_cpu(smp_call_func_t func, void *info, int wait)

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Yejune Deng <yejune.deng@gmail.com>
---
include/linux/smp.h | 10 +++++-----
kernel/smp.c | 8 ++++----
kernel/up.c | 6 +++---
3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/smp.h b/include/linux/smp.h
index 70c6f6284dcf..5f27ebd504e2 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -48,12 +48,12 @@ extern void __smp_call_single_queue(int cpu, struct llist_node *node);
extern unsigned int total_cpus;

int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
- int wait);
+ bool wait);

/*
* Call a function on all processors
*/
-void on_each_cpu(smp_call_func_t func, void *info, int wait);
+void on_each_cpu(smp_call_func_t func, void *info, bool wait);

/*
* Call a function on processors specified by mask, which might include
@@ -117,12 +117,12 @@ extern void smp_cpus_done(unsigned int max_cpus);
/*
* Call a function on all other processors
*/
-void smp_call_function(smp_call_func_t func, void *info, int wait);
+void smp_call_function(smp_call_func_t func, void *info, bool wait);
void smp_call_function_many(const struct cpumask *mask,
smp_call_func_t func, void *info, bool wait);

int smp_call_function_any(const struct cpumask *mask,
- smp_call_func_t func, void *info, int wait);
+ smp_call_func_t func, void *info, bool wait);

void kick_all_cpus_sync(void);
void wake_up_all_idle_cpus(void);
@@ -174,7 +174,7 @@ static inline void call_function_init(void) { }

static inline int
smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
- void *info, int wait)
+ void *info, bool wait)
{
return smp_call_function_single(0, func, info, wait);
}
diff --git a/kernel/smp.c b/kernel/smp.c
index 1b6070bf97bb..c72e474d53ab 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -461,7 +461,7 @@ void flush_smp_call_function_from_idle(void)
* Returns 0 on success, else a negative status code.
*/
int smp_call_function_single(int cpu, smp_call_func_t func, void *info,
- int wait)
+ bool wait)
{
call_single_data_t *csd;
call_single_data_t csd_stack = {
@@ -576,7 +576,7 @@ EXPORT_SYMBOL_GPL(smp_call_function_single_async);
* 3) any other online cpu in @mask
*/
int smp_call_function_any(const struct cpumask *mask,
- smp_call_func_t func, void *info, int wait)
+ smp_call_func_t func, void *info, bool wait)
{
unsigned int cpu;
const struct cpumask *nodemask;
@@ -727,7 +727,7 @@ EXPORT_SYMBOL(smp_call_function_many);
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler.
*/
-void smp_call_function(smp_call_func_t func, void *info, int wait)
+void smp_call_function(smp_call_func_t func, void *info, bool wait)
{
preempt_disable();
smp_call_function_many(cpu_online_mask, func, info, wait);
@@ -824,7 +824,7 @@ void __init smp_init(void)
* early_boot_irqs_disabled is set. Use local_irq_save/restore() instead
* of local_irq_disable/enable().
*/
-void on_each_cpu(smp_call_func_t func, void *info, int wait)
+void on_each_cpu(smp_call_func_t func, void *info, bool wait)
{
unsigned long flags;

diff --git a/kernel/up.c b/kernel/up.c
index c6f323dcd45b..722ceec09417 100644
--- a/kernel/up.c
+++ b/kernel/up.c
@@ -9,8 +9,8 @@
#include <linux/smp.h>
#include <linux/hypervisor.h>

-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
- int wait)
+int smp_call_function_single(int cpu, void (*func) (void *info),
+ void *info, bool wait)
{
unsigned long flags;

@@ -36,7 +36,7 @@ int smp_call_function_single_async(int cpu, call_single_data_t *csd)
}
EXPORT_SYMBOL(smp_call_function_single_async);

-void on_each_cpu(smp_call_func_t func, void *info, int wait)
+void on_each_cpu(smp_call_func_t func, void *info, bool wait)
{
unsigned long flags;

--
2.29.0

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