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authorGustavo A. R. Silva <gustavo@embeddedor.com>2020-02-11 14:53:56 -0600
committerDavid S. Miller <davem@davemloft.net>2020-02-16 18:33:00 -0800
commit1f4c51de3361f3d9223f7662b9567844e9fb7ca8 (patch)
tree4d4c628d7e223aed6d8eb8aec5330cb876dedb00
parentptp_qoriq: drop the code of alarm (diff)
downloadlinux-dev-1f4c51de3361f3d9223f7662b9567844e9fb7ca8.tar.xz
linux-dev-1f4c51de3361f3d9223f7662b9567844e9fb7ca8.zip
lib: objagg: Replace zero-length arrays with flexible-array member
The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertenly introduced[3] to the codebase from now on. This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--lib/objagg.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/objagg.c b/lib/objagg.c
index 55621fb82e0a..5e1676ccdadd 100644
--- a/lib/objagg.c
+++ b/lib/objagg.c
@@ -28,7 +28,7 @@ struct objagg_hints_node {
struct objagg_hints_node *parent;
unsigned int root_id;
struct objagg_obj_stats_info stats_info;
- unsigned long obj[0];
+ unsigned long obj[];
};
static struct objagg_hints_node *
@@ -66,7 +66,7 @@ struct objagg_obj {
* including nested objects
*/
struct objagg_obj_stats stats;
- unsigned long obj[0];
+ unsigned long obj[];
};
static unsigned int objagg_obj_ref_inc(struct objagg_obj *objagg_obj)