mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 07:13:34 +00:00
5bb783cc92
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]
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
|
||
---|---|---|
.. | ||
controllers | ||
atmel.c | ||
catalyst.c | ||
core.c | ||
core.h | ||
eon.c | ||
esmt.c | ||
everspin.c | ||
fujitsu.c | ||
gigadevice.c | ||
intel.c | ||
issi.c | ||
Kconfig | ||
macronix.c | ||
Makefile | ||
micron-st.c | ||
sfdp.c | ||
sfdp.h | ||
spansion.c | ||
sst.c | ||
winbond.c | ||
xilinx.c | ||
xmc.c |