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kmemleak: change some global variables to int
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They don't have to be atomic_t, because they are simple boolean toggles.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Li Zefan authored and Linus Torvalds committed Apr 3, 2014
1 parent 5f3bf19 commit 8910ae8
Showing 1 changed file with 40 additions and 40 deletions.
80 changes: 40 additions & 40 deletions mm/kmemleak.c
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Original file line number Diff line number Diff line change
Expand Up @@ -192,15 +192,15 @@ static struct kmem_cache *object_cache;
static struct kmem_cache *scan_area_cache;

/* set if tracing memory operations is enabled */
static atomic_t kmemleak_enabled = ATOMIC_INIT(0);
static int kmemleak_enabled;
/* set in the late_initcall if there were no errors */
static atomic_t kmemleak_initialized = ATOMIC_INIT(0);
static int kmemleak_initialized;
/* enables or disables early logging of the memory operations */
static atomic_t kmemleak_early_log = ATOMIC_INIT(1);
static int kmemleak_early_log = 1;
/* set if a kmemleak warning was issued */
static atomic_t kmemleak_warning = ATOMIC_INIT(0);
static int kmemleak_warning;
/* set if a fatal kmemleak error has occurred */
static atomic_t kmemleak_error = ATOMIC_INIT(0);
static int kmemleak_error;

/* minimum and maximum address that may be valid pointers */
static unsigned long min_addr = ULONG_MAX;
Expand Down Expand Up @@ -268,7 +268,7 @@ static void kmemleak_disable(void);
#define kmemleak_warn(x...) do { \
pr_warning(x); \
dump_stack(); \
atomic_set(&kmemleak_warning, 1); \
kmemleak_warning = 1; \
} while (0)

/*
Expand Down Expand Up @@ -806,7 +806,7 @@ static void __init log_early(int op_type, const void *ptr, size_t size,
unsigned long flags;
struct early_log *log;

if (atomic_read(&kmemleak_error)) {
if (kmemleak_error) {
/* kmemleak stopped recording, just count the requests */
crt_early_log++;
return;
Expand Down Expand Up @@ -841,7 +841,7 @@ static void early_alloc(struct early_log *log)
unsigned long flags;
int i;

if (!atomic_read(&kmemleak_enabled) || !log->ptr || IS_ERR(log->ptr))
if (!kmemleak_enabled || !log->ptr || IS_ERR(log->ptr))
return;

/*
Expand Down Expand Up @@ -894,9 +894,9 @@ void __ref kmemleak_alloc(const void *ptr, size_t size, int min_count,
{
pr_debug("%s(0x%p, %zu, %d)\n", __func__, ptr, size, min_count);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
create_object((unsigned long)ptr, size, min_count, gfp);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_ALLOC, ptr, size, min_count);
}
EXPORT_SYMBOL_GPL(kmemleak_alloc);
Expand All @@ -920,11 +920,11 @@ void __ref kmemleak_alloc_percpu(const void __percpu *ptr, size_t size)
* Percpu allocations are only scanned and not reported as leaks
* (min_count is set to 0).
*/
if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
for_each_possible_cpu(cpu)
create_object((unsigned long)per_cpu_ptr(ptr, cpu),
size, 0, GFP_KERNEL);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_ALLOC_PERCPU, ptr, size, 0);
}
EXPORT_SYMBOL_GPL(kmemleak_alloc_percpu);
Expand All @@ -940,9 +940,9 @@ void __ref kmemleak_free(const void *ptr)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
delete_object_full((unsigned long)ptr);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_FREE, ptr, 0, 0);
}
EXPORT_SYMBOL_GPL(kmemleak_free);
Expand All @@ -960,9 +960,9 @@ void __ref kmemleak_free_part(const void *ptr, size_t size)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
delete_object_part((unsigned long)ptr, size);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_FREE_PART, ptr, size, 0);
}
EXPORT_SYMBOL_GPL(kmemleak_free_part);
Expand All @@ -980,11 +980,11 @@ void __ref kmemleak_free_percpu(const void __percpu *ptr)

pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
for_each_possible_cpu(cpu)
delete_object_full((unsigned long)per_cpu_ptr(ptr,
cpu));
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_FREE_PERCPU, ptr, 0, 0);
}
EXPORT_SYMBOL_GPL(kmemleak_free_percpu);
Expand All @@ -1000,9 +1000,9 @@ void __ref kmemleak_not_leak(const void *ptr)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
make_gray_object((unsigned long)ptr);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_NOT_LEAK, ptr, 0, 0);
}
EXPORT_SYMBOL(kmemleak_not_leak);
Expand All @@ -1020,9 +1020,9 @@ void __ref kmemleak_ignore(const void *ptr)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
make_black_object((unsigned long)ptr);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_IGNORE, ptr, 0, 0);
}
EXPORT_SYMBOL(kmemleak_ignore);
Expand All @@ -1042,9 +1042,9 @@ void __ref kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && size && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && size && !IS_ERR(ptr))
add_scan_area((unsigned long)ptr, size, gfp);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_SCAN_AREA, ptr, size, 0);
}
EXPORT_SYMBOL(kmemleak_scan_area);
Expand All @@ -1062,9 +1062,9 @@ void __ref kmemleak_no_scan(const void *ptr)
{
pr_debug("%s(0x%p)\n", __func__, ptr);

if (atomic_read(&kmemleak_enabled) && ptr && !IS_ERR(ptr))
if (kmemleak_enabled && ptr && !IS_ERR(ptr))
object_no_scan((unsigned long)ptr);
else if (atomic_read(&kmemleak_early_log))
else if (kmemleak_early_log)
log_early(KMEMLEAK_NO_SCAN, ptr, 0, 0);
}
EXPORT_SYMBOL(kmemleak_no_scan);
Expand All @@ -1089,7 +1089,7 @@ static bool update_checksum(struct kmemleak_object *object)
*/
static int scan_should_stop(void)
{
if (!atomic_read(&kmemleak_enabled))
if (!kmemleak_enabled)
return 1;

/*
Expand Down Expand Up @@ -1630,14 +1630,14 @@ static ssize_t kmemleak_write(struct file *file, const char __user *user_buf,
return ret;

if (strncmp(buf, "clear", 5) == 0) {
if (atomic_read(&kmemleak_enabled))
if (kmemleak_enabled)
kmemleak_clear();
else
__kmemleak_do_cleanup();
goto out;
}

if (!atomic_read(&kmemleak_enabled)) {
if (!kmemleak_enabled) {
ret = -EBUSY;
goto out;
}
Expand Down Expand Up @@ -1726,14 +1726,14 @@ static DECLARE_WORK(cleanup_work, kmemleak_do_cleanup);
static void kmemleak_disable(void)
{
/* atomically check whether it was already invoked */
if (atomic_cmpxchg(&kmemleak_error, 0, 1))
if (cmpxchg(&kmemleak_error, 0, 1))
return;

/* stop any memory operation tracing */
atomic_set(&kmemleak_enabled, 0);
kmemleak_enabled = 0;

/* check whether it is too early for a kernel thread */
if (atomic_read(&kmemleak_initialized))
if (kmemleak_initialized)
schedule_work(&cleanup_work);

pr_info("Kernel memory leak detector disabled\n");
Expand Down Expand Up @@ -1775,9 +1775,10 @@ void __init kmemleak_init(void)
int i;
unsigned long flags;

kmemleak_early_log = 0;

#ifdef CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF
if (!kmemleak_skip_disable) {
atomic_set(&kmemleak_early_log, 0);
kmemleak_disable();
return;
}
Expand All @@ -1795,12 +1796,11 @@ void __init kmemleak_init(void)

/* the kernel is still in UP mode, so disabling the IRQs is enough */
local_irq_save(flags);
atomic_set(&kmemleak_early_log, 0);
if (atomic_read(&kmemleak_error)) {
if (kmemleak_error) {
local_irq_restore(flags);
return;
} else
atomic_set(&kmemleak_enabled, 1);
kmemleak_enabled = 1;
local_irq_restore(flags);

/*
Expand Down Expand Up @@ -1844,9 +1844,9 @@ void __init kmemleak_init(void)
log->op_type);
}

if (atomic_read(&kmemleak_warning)) {
if (kmemleak_warning) {
print_log_trace(log);
atomic_set(&kmemleak_warning, 0);
kmemleak_warning = 0;
}
}
}
Expand All @@ -1858,9 +1858,9 @@ static int __init kmemleak_late_init(void)
{
struct dentry *dentry;

atomic_set(&kmemleak_initialized, 1);
kmemleak_initialized = 1;

if (atomic_read(&kmemleak_error)) {
if (kmemleak_error) {
/*
* Some error occurred and kmemleak was disabled. There is a
* small chance that kmemleak_disable() was called immediately
Expand Down

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