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authorJohannes Berg <johannes.berg@intel.com>2021-05-06 18:04:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-07 00:26:32 -0700
commit3180c44fe1baf14fc876a4cdad77ea7b51ddc387 (patch)
treee1de9e0ae4e4559ea91788ecf79e771289151973
parent7a1d55b987dfcbddecdb67eecc76fe555d4348ba (diff)
downloadlinux-3180c44fe1baf14fc876a4cdad77ea7b51ddc387.tar.bz2
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>
-rw-r--r--kernel/gcov/fs.c24
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);
}
/**