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mei: bus: 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 7649773293
("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20200211210822.GA31368@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
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1 changed files with 2 additions and 2 deletions
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@ -91,7 +91,7 @@ struct mkhi_rule_id {
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struct mkhi_fwcaps {
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struct mkhi_rule_id id;
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u8 len;
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u8 data[0];
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u8 data[];
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} __packed;
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struct mkhi_fw_ver_block {
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@ -119,7 +119,7 @@ struct mkhi_msg_hdr {
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struct mkhi_msg {
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struct mkhi_msg_hdr hdr;
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u8 data[0];
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u8 data[];
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} __packed;
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#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
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