On Tue, 2021-02-09 at 10:33 -0800, Song Liu wrote:
> BPF programs explicitly initialise global variables to 0 to make sure
> clang (v10 or older) do not put the variables in the common section.
> Skip "initialise globals to 0" check for BPF programs to elimiate error
> messages like:
>
> ERROR: do not initialise globals to 0
> #19: FILE: samples/bpf/tracex1_kern.c:21:
>
> Cc: Andy Whitcroft <apw@xxxxxxxxxxxxx>
> Cc: Joe Perches <joe@xxxxxxxxxxx>
> Signed-off-by: Song Liu <songliubraving@xxxxxx>
>
> ---
> Changes v2 => v3:
> 1. Fix regex.
Unfortunately, this has broken regexes...
> Changes v1 => v2:
> 1. Add function exclude_global_initialisers() to keep the code clean.
> ---
> scripts/checkpatch.pl | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -2428,6 +2428,15 @@ sub get_raw_comment {
> return $comment;
> }
>
> +sub exclude_global_initialisers {
> + my ($realfile) = @_;
> +
> + # Do not check for BPF programs (tools/testing/selftests/bpf/progs/*.c, samples/bpf/*_kern.c, *.bpf.c).
> + return $realfile =~ m@/^tools\/testing\/selftests\/bpf\/progs\/.*\.c@ ||
You don't need to escape the / when using m@@, and this doesn't work
given the leading / after @, and it should use a trailing $
return $realfile =~ m@^tools/testing/selftests/bpf/progs/.*\.c$@ ||
> + $realfile =~ m@^samples\/bpf\/.*_kern.c@ ||
This is still missing an escape on the . before c@, and there's no
trailing $ between c and @
$realfile =~ m@^samples/bpf/.*_kern\.c$@ ||
> + $realfile =~ m@/bpf/.*\.bpf\.c$@;
I believe I showed the correct regexes in my earlier reply.
