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| author | Andrey Konovalov <andreyknvl@google.com> | 2023-11-20 18:47:08 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-10 16:51:45 -0800 |
| commit | a5d21f71715a0459e5313881203f86eefbeefb3b (patch) | |
| tree | c8bf7e59f1dfbbd10e8b40ec3703c916e07fcfdb /lib/stackdepot.c | |
| parent | b6a353d3ebc2b5eea3cab81ed81764bb1dd6f4ab (diff) | |
| download | lwn-a5d21f71715a0459e5313881203f86eefbeefb3b.tar.gz lwn-a5d21f71715a0459e5313881203f86eefbeefb3b.zip | |
lib/stackdepot: store next pool pointer in new_pool
Instead of using the last pointer in stack_pools for storing the pointer
to a new pool (which does not yet store any stack records), use a new
new_pool variable.
This a purely code readability change: it seems more logical to store the
pointer to a pool with a special meaning in a dedicated variable.
Link: https://lkml.kernel.org/r/448bc18296c16bef95cb3167697be6583dcc8ce3.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/stackdepot.c')
| -rw-r--r-- | lib/stackdepot.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/stackdepot.c b/lib/stackdepot.c index a38661beab97..68c1ac9aa916 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -85,6 +85,8 @@ static unsigned int stack_hash_mask; /* Array of memory regions that store stack traces. */ static void *stack_pools[DEPOT_MAX_POOLS]; +/* Newly allocated pool that is not yet added to stack_pools. */ +static void *new_pool; /* Currently used pool in stack_pools. */ static int pool_index; /* Offset to the unused space in the currently used pool. */ @@ -241,7 +243,7 @@ static void depot_keep_new_pool(void **prealloc) * as long as we do not exceed the maximum number of pools. */ if (pool_index + 1 < DEPOT_MAX_POOLS) { - stack_pools[pool_index + 1] = *prealloc; + new_pool = *prealloc; *prealloc = NULL; } @@ -272,6 +274,8 @@ static bool depot_update_pools(size_t required_size, void **prealloc) * stack_depot_fetch(). */ WRITE_ONCE(pool_index, pool_index + 1); + stack_pools[pool_index] = new_pool; + new_pool = NULL; pool_offset = 0; /* |