diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2023-02-10 22:15:55 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-16 20:43:49 -0800 |
| commit | 0d249ac0e07680960929a2d4f7b32be505c8c7a1 (patch) | |
| tree | e00ad066d3b9bd94c7fd70b42404ff450032958e /lib | |
| parent | c60324fbf05d9b1dd3231f5373d4bf31cc23db07 (diff) | |
lib/stackdepot: reorder and annotate global variables
Group stack depot global variables by their purpose:
1. Hash table-related variables,
2. Slab-related variables,
and add comments.
Also clean up comments for hash table-related constants.
Link: https://lkml.kernel.org/r/5606a6c70659065a25bee59cd10e57fc60bb4110.1676063693.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/stackdepot.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 3c713f70b0a3..de1afe3fb24d 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -75,24 +75,31 @@ static bool stack_depot_disabled; static bool __stack_depot_early_init_requested __initdata = IS_ENABLED(CONFIG_STACKDEPOT_ALWAYS_INIT); static bool __stack_depot_early_init_passed __initdata; -static void *stack_slabs[STACK_ALLOC_MAX_SLABS]; - -static int depot_index; -static int next_slab_inited; -static size_t depot_offset; -static DEFINE_RAW_SPINLOCK(depot_lock); - -/* one hash table bucket entry per 16kB of memory */ +/* Use one hash table bucket per 16 KB of memory. */ #define STACK_HASH_SCALE 14 -/* limited between 4k and 1M buckets */ +/* Limit the number of buckets between 4K and 1M. */ #define STACK_HASH_ORDER_MIN 12 #define STACK_HASH_ORDER_MAX 20 +/* Initial seed for jhash2. */ #define STACK_HASH_SEED 0x9747b28c +/* Hash table of pointers to stored stack traces. */ +static struct stack_record **stack_table; +/* Fixed order of the number of table buckets. Used when KASAN is enabled. */ static unsigned int stack_hash_order; +/* Hash mask for indexing the table. */ static unsigned int stack_hash_mask; -static struct stack_record **stack_table; +/* Array of memory regions that store stack traces. */ +static void *stack_slabs[STACK_ALLOC_MAX_SLABS]; +/* Currently used slab in stack_slabs. */ +static int depot_index; +/* Offset to the unused space in the currently used slab. */ +static size_t depot_offset; +/* Lock that protects the variables above. */ +static DEFINE_RAW_SPINLOCK(depot_lock); +/* Whether the next slab is initialized. */ +static int next_slab_inited; static int __init disable_stack_depot(char *str) { |