diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2021-05-06 18:04:48 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-07 00:26:32 -0700 |
| commit | 3180c44fe1baf14fc876a4cdad77ea7b51ddc387 (patch) | |
| tree | e1de9e0ae4e4559ea91788ecf79e771289151973 /kernel | |
| parent | gcov: combine common code (diff) | |
| download | linux-dev-3180c44fe1baf14fc876a4cdad77ea7b51ddc387.tar.xz linux-dev-3180c44fe1baf14fc876a4cdad77ea7b51ddc387.zip | |
gcov: simplify buffer allocation
Use just a single vmalloc() with struct_size() instead of a separate
kmalloc() for the iter struct.
Link: https://lkml.kernel.org/r/20210315235453.b6de4a92096e.Iac40a5166589cefbff8449e466bd1b38ea7a17af@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/gcov/fs.c | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c index 2d29e1d1225d..40ea81c0475b 100644 --- a/kernel/gcov/fs.c +++ b/kernel/gcov/fs.c @@ -97,9 +97,9 @@ __setup("gcov_persist=", gcov_persist_setup); */ struct gcov_iterator { struct gcov_info *info; - void *buffer; size_t size; loff_t pos; + char buffer[]; }; /** @@ -111,25 +111,20 @@ struct gcov_iterator { static struct gcov_iterator *gcov_iter_new(struct gcov_info *info) { struct gcov_iterator *iter; + size_t size; + + /* Dry-run to get the actual buffer size. */ + size = convert_to_gcda(NULL, info); - iter = kzalloc(sizeof(struct gcov_iterator), GFP_KERNEL); + iter = vmalloc(struct_size(iter, buffer, size)); if (!iter) - goto err_free; + return NULL; iter->info = info; - /* Dry-run to get the actual buffer size. */ - iter->size = convert_to_gcda(NULL, info); - iter->buffer = vmalloc(iter->size); - if (!iter->buffer) - goto err_free; - + iter->size = size; convert_to_gcda(iter->buffer, info); return iter; - -err_free: - kfree(iter); - return NULL; } @@ -139,8 +134,7 @@ err_free: */ static void gcov_iter_free(struct gcov_iterator *iter) { - vfree(iter->buffer); - kfree(iter); + vfree(iter); } /** |