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mm/kmemleak: move the initialisation of object to __link_object

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In patch (mm: kmemleak: split __create_object into two functions), the
initialisation of object has been splited in two places.  Catalin said it
feels a bit weird and error prone.  So leave __alloc_object() to just do
the actual allocation and let __link_object() do the full initialisation.

Link: https://lkml.kernel.org/r/20231023025125.90972-1-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liu Shixin 2023-10-23 10:51:25 +08:00 committed by Andrew Morton
parent 5e4fc577db
commit 245245c2ff
1 changed files with 17 additions and 19 deletions
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36
mm/kmemleak.c
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@ -642,16 +642,32 @@ static struct kmemleak_object *__alloc_object(gfp_t gfp)
if (!object) {
pr_warn("Cannot allocate a kmemleak_object structure\n");
kmemleak_disable();
return NULL;
}
return object;
}
static int __link_object(struct kmemleak_object *object, unsigned long ptr,
size_t size, int min_count, bool is_phys)
{
struct kmemleak_object *parent;
struct rb_node **link, *rb_parent;
unsigned long untagged_ptr;
unsigned long untagged_objp;
INIT_LIST_HEAD(&object->object_list);
INIT_LIST_HEAD(&object->gray_list);
INIT_HLIST_HEAD(&object->area_list);
raw_spin_lock_init(&object->lock);
atomic_set(&object->use_count, 1);
object->flags = OBJECT_ALLOCATED | (is_phys ? OBJECT_PHYS : 0);
object->pointer = ptr;
object->size = kfence_ksize((void *)ptr) ?: size;
object->excess_ref = 0;
object->min_count = min_count;
object->count = 0; /* white color initially */
object->jiffies = jiffies;
object->checksum = 0;
object->del_state = 0;
@ -676,24 +692,6 @@ static struct kmemleak_object *__alloc_object(gfp_t gfp)
/* kernel backtrace */
object->trace_handle = set_track_prepare();
return object;
}
static int __link_object(struct kmemleak_object *object, unsigned long ptr,
size_t size, int min_count, bool is_phys)
{
struct kmemleak_object *parent;
struct rb_node **link, *rb_parent;
unsigned long untagged_ptr;
unsigned long untagged_objp;
object->flags = OBJECT_ALLOCATED | (is_phys ? OBJECT_PHYS : 0);
object->pointer = ptr;
object->size = kfence_ksize((void *)ptr) ?: size;
object->min_count = min_count;
object->jiffies = jiffies;
untagged_ptr = (unsigned long)kasan_reset_tag((void *)ptr);
/*
* Only update min_addr and max_addr with object