From: Meng Tang <tangmeng@xxxxxxxxxxxxx>
> Sent: 24 February 2022 10:53
>
> Previously, arrays defined by struct ctl_path is terminated
> with an empty one. For example, when we actually only register
> one ctl_path, we've gone from 8 bytes to 16 bytes.
>
...
> diff --git a/arch/csky/abiv1/alignment.c b/arch/csky/abiv1/alignment.c
> index 2df115d0e210..b9290a252d84 100644
> --- a/arch/csky/abiv1/alignment.c
> +++ b/arch/csky/abiv1/alignment.c
> @@ -340,14 +340,14 @@ static struct ctl_table sysctl_table[2] = {
> {}
> };
>
> -static struct ctl_path sysctl_path[2] = {
> - {.procname = "csky"},
> - {}
> +static struct ctl_path sysctl_path[1] = {
> + {.procname = "csky"}
> };
> +#define SYSCTL_PATH_NUM ARRAY_SIZE(sysctl_path)
>
> static int __init csky_alignment_init(void)
> {
> - (sysctl_path, sysctl_table);
> + register_sysctl_paths(sysctl_path, SYSCTL_PATH_NUM, sysctl_table);
> return 0;
> }
That is horribly error prone.
What might work is to add the ctl_path_num parameter but leave in the
check for NULL.
Then add:
#define register_sysctl_paths(p, t) register_sysctl_paths(p, ARRAY_SIZE(t), t)
in the header file after the prototype.
Put the function name in () in the definition to stop the macro expansion.
David
-
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