Re: [PATCH 2/2] checkpatch.pl: forbid strerrorname_np()

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 24/4/24 11:47, Daniel Henrique Barboza wrote:
> Commit d424db2354 removed an instance of strerrorname_np() because it
> was breaking building with musl libc. A recent RISC-V patch ended up
> re-introducing it again by accident.
> 
> Put this function in the baddies list in checkpatch.pl to avoid this
> situation again. This is what it will look like next time:
> 
>   $ ./scripts/checkpatch.pl 0001-temp-test.patch
>   ERROR: use strerror() instead of strerrorname_np()
>   #22: FILE: target/riscv/kvm/kvm-cpu.c:1058:
>   +                         strerrorname_np(errno));
> 
>   total: 1 errors, 0 warnings, 10 lines checked
> 
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
>   scripts/checkpatch.pl | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 7026895074..be0982246d 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -3056,6 +3056,10 @@ sub process {
>   		}
>   	}
>   
> +	if ($line =~ /\bstrerrorname_np\(/) {
> +		ERROR("use strerror() instead of strerrorname_np()\n" . $herecurr);
> +	}
> +
>   # check for non-portable libc calls that have portable alternatives in QEMU

This should be added here in the "non-portable libc calls" section.

>   		if ($line =~ /\bffs\(/) {
>   			ERROR("use ctz32() instead of ffs()\n" . $herecurr);