Gustavo A. R. Silva 95e486f551 xdp: 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> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Acked-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2020-02-28 12:08:37 -08:00
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Kconfig
Makefile
xdp_umem.c	mm, tree-wide: rename put_user_page*() to unpin_user_page*()	2020-01-31 10:30:38 -08:00
xdp_umem.h
xsk.c	xsk: Publish global consumer pointers when NAPI is finished	2020-02-11 15:51:11 +01:00
xsk.h
xsk_diag.c
xsk_queue.c	xsk: Use struct_size() helper	2019-12-20 16:00:09 -08:00
xsk_queue.h	xdp: Replace zero-length array with flexible-array member	2020-02-28 12:08:37 -08:00