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debugobjects: Fix the compilation attributes of some global variables

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1. Both debug_objects_pool_min_level and debug_objects_pool_size are
   read-only after initialization, change attribute '__read_mostly' to
   '__ro_after_init', and remove '__data_racy'.

2. Many global variables are read in the debug_stats_show() function, but
   didn't mask KCSAN's detection. Add '__data_racy' for them.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240904133944.2124-2-thunder.leizhen@huawei.com
This commit is contained in:
Zhen Lei 2024-09-04 21:39:39 +08:00 committed by Thomas Gleixner
parent 431c1646e1
commit e4757c710b
1 changed files with 7 additions and 7 deletions
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14
lib/debugobjects.c
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@ -70,10 +70,10 @@ static HLIST_HEAD(obj_to_free);
* made at debug_stats_show(). Both obj_pool_min_free and obj_pool_max_used
* can be off.
*/
static int obj_pool_min_free = ODEBUG_POOL_SIZE;
static int obj_pool_free = ODEBUG_POOL_SIZE;
static int __data_racy obj_pool_min_free = ODEBUG_POOL_SIZE;
static int __data_racy obj_pool_free = ODEBUG_POOL_SIZE;
static int obj_pool_used;
static int obj_pool_max_used;
static int __data_racy obj_pool_max_used;
static bool obj_freeing;
/* The number of objs on the global free list */
static int obj_nr_tofree;
@ -84,9 +84,9 @@ static int __data_racy debug_objects_fixups __read_mostly;
static int __data_racy debug_objects_warnings __read_mostly;
static int __data_racy debug_objects_enabled __read_mostly
= CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT;
static int __data_racy debug_objects_pool_size __read_mostly
static int debug_objects_pool_size __ro_after_init
= ODEBUG_POOL_SIZE;
static int __data_racy debug_objects_pool_min_level __read_mostly
static int debug_objects_pool_min_level __ro_after_init
= ODEBUG_POOL_MIN_LEVEL;
static const struct debug_obj_descr *descr_test __read_mostly;
@ -95,8 +95,8 @@ static struct kmem_cache *obj_cache __ro_after_init;
/*
* Track numbers of kmem_cache_alloc()/free() calls done.
*/
static int debug_objects_allocated;
static int debug_objects_freed;
static int __data_racy debug_objects_allocated;
static int __data_racy debug_objects_freed;
static void free_obj_work(struct work_struct *work);
static DECLARE_DELAYED_WORK(debug_obj_work, free_obj_work);