mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
mtd: spi-nor: controllers: aspeed-smc: 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
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 7649773293
("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
This commit is contained in:
parent
e0fe5339d4
commit
5bb783cc92
1 changed files with 1 additions and 1 deletions
|
@ -109,7 +109,7 @@ struct aspeed_smc_controller {
|
|||
void __iomem *ahb_base; /* per-chip windows resource */
|
||||
u32 ahb_window_size; /* full mapping window size */
|
||||
|
||||
struct aspeed_smc_chip *chips[0]; /* pointers to attached chips */
|
||||
struct aspeed_smc_chip *chips[]; /* pointers to attached chips */
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
Loading…
Reference in a new issue