Re: [PATCH tip/core/rcu 20/21] checkpatch: Add warnings for {smp_,}read_barrier_depends()

[Joe Perches]

On Fri, 2017-12-01 at 11:51 -0800, Paul E. McKenney wrote:
> Now that both smp_read_barrier_depends() and read_barrier_depends()
> are being de-emphasized, warn if any are added.

This would also warn on existing files when run
with ./scripts/checkpatch.pl -f <file>

Do you want it to check new patches only?

If so the test could become "if (!$file && etc...)

> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 95cda3ecc66b..25f7098e2ad3 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -5586,6 +5586,12 @@ sub process {
>  			}
>  		}
>  
> +# check for smp_read_barrier_depends and read_barrier_depends
> +		if ($line =~ /\b(smp_|)read_barrier_depends\(/) {

Must become

+		if ($line =~ /\b(smp_|)read_barrier_depends\s*\(/) {

similar to the lines above this as there are sometimes
spaces between function name and argument parentheses.