kernel_optimize_test/drivers/nfc
Gustavo A. R. Silva da60fbe7ef NFC: 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: David S. Miller <davem@davemloft.net>
2020-02-27 12:06:20 -08:00
..
fdp NFC: Replace zero-length array with flexible-array member 2020-02-27 12:06:20 -08:00
microread treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 399 2019-06-05 17:37:12 +02:00
nfcmrvl nfc: Fix Kconfig indentation 2019-11-20 12:30:40 -08:00
nxp-nci NFC: nxp-nci: Fix probing without ACPI 2019-12-09 20:15:17 -08:00
pn533 Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2020-01-19 22:10:04 +01:00
pn544 nfc: pn544: Fix occasional HW initialization failure 2020-02-19 11:09:27 -08:00
s3fwrn5 nfc: s3fwrn5: replace the assertion with a WARN_ON 2019-12-19 17:33:23 -08:00
st-nci st_nci_hci_connectivity_event_received: null check the allocation 2019-07-25 11:48:06 -07:00
st21nfca NFC: Replace zero-length array with flexible-array member 2020-02-27 12:06:20 -08:00
st95hf NFC: st95hf: clean up indentation issue 2019-09-27 20:31:18 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mei_phy.c nfc/mei: convert to SPDX license tags 2019-03-28 02:07:54 +09:00
mei_phy.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfcsim.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
port100.c NFC: port100: Convert cpu_to_le16(le16_to_cpu(E1) + E2) to use le16_add_cpu(). 2019-12-09 14:27:26 -08:00
trf7970a.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 417 2019-06-05 17:37:15 +02:00