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misc: bcm-vk: Replace zero-length array with flexible array member

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There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

Also, make use of the struct_size() helper in kzalloc().

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.10/process/deprecated.html#zero-length-and-one-element-arrays

Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210514230801.GA35863@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2021-05-14 18:08:01 -05:00 committed by Greg Kroah-Hartman
parent d9eb95845d
commit 208012f051
2 changed files with 2 additions and 3 deletions
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3
drivers/misc/bcm-vk/bcm_vk_msg.c
View file

@ -701,8 +701,7 @@ int bcm_vk_send_shutdown_msg(struct bcm_vk *vk, u32 shut_type,
return -EINVAL;
}
entry = kzalloc(sizeof(*entry) +
sizeof(struct vk_msg_blk), GFP_KERNEL);
entry = kzalloc(struct_size(entry, to_v_msg, 1), GFP_KERNEL);
if (!entry)
return -ENOMEM;

2
drivers/misc/bcm-vk/bcm_vk_msg.h
View file

@ -116,7 +116,7 @@ struct bcm_vk_wkent {
u32 usr_msg_id;
u32 to_v_blks;
u32 seq_num;
struct vk_msg_blk to_v_msg[0];
struct vk_msg_blk to_v_msg[];
};
/* queue stats counters */