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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
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
Lastly, fix checkpatch.pl warning
WARNING: __aligned(size) is preferred over __attribute__((aligned(size)))
in net/bridge/netfilter/ebtables.c
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
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|---|---|---|
| .. | ||
| ip_set_bitmap_gen.h | ||
| ip_set_bitmap_ip.c | ||
| ip_set_bitmap_ipmac.c | ||
| ip_set_bitmap_port.c | ||
| ip_set_core.c | ||
| ip_set_getport.c | ||
| ip_set_hash_gen.h | ||
| ip_set_hash_ip.c | ||
| ip_set_hash_ipmac.c | ||
| ip_set_hash_ipmark.c | ||
| ip_set_hash_ipport.c | ||
| ip_set_hash_ipportip.c | ||
| ip_set_hash_ipportnet.c | ||
| ip_set_hash_mac.c | ||
| ip_set_hash_net.c | ||
| ip_set_hash_netiface.c | ||
| ip_set_hash_netnet.c | ||
| ip_set_hash_netport.c | ||
| ip_set_hash_netportnet.c | ||
| ip_set_list_set.c | ||
| Kconfig | ||
| Makefile | ||
| pfxlen.c | ||