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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2020-02-12 02:20:09 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-02-14 15:08:49 +0300 |
| commit | 3084ea9ea88906576d0bfc0d66cb1735045266c8 (patch) | |
| tree | e3f6100c5550a98c55e9eb75c787ae0f37561485 /drivers/thunderbolt | |
| parent | c2a9fca17e4c021e526cc52b78e0f30105024b82 (diff) | |
| download | linux-3084ea9ea88906576d0bfc0d66cb1735045266c8.tar.xz | |
thunderbolt: icm: Replace zero-length array 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>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/icm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index 13e88109742e..fbbe32ca1e69 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -114,7 +114,7 @@ struct icm_notification { struct ep_name_entry { u8 len; u8 type; - u8 data[0]; + u8 data[]; }; #define EP_NAME_INTEL_VSS 0x10 |