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authorSong Liu <songliubraving@fb.com>2021-02-25 17:22:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 09:41:04 -0800
commit5b8f82e1a17695c9e5fec5842b234967782d7e5b (patch)
tree7ef5c6657edb5ad54f7a3172b98956da6f611546 /scripts
parent263afd39c06f5939ef943e0d535380d4b8e56484 (diff)
checkpatch: do not apply "initialise globals to 0" check to BPF progs
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: Link: https://lkml.kernel.org/r/20210209211954.490077-1-songliubraving@fb.com Signed-off-by: Song Liu <songliubraving@fb.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/checkpatch.pl12
1 files changed, 11 insertions, 1 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 75c93316547b..df8b23dc1eb0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2453,6 +2453,15 @@ 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 $realfile =~ m@^tools/testing/selftests/bpf/progs/.*\.c$@ ||
+ $realfile =~ m@^samples/bpf/.*_kern\.c$@ ||
+ $realfile =~ m@/bpf/.*\.bpf\.c$@;
+}
+
sub process {
my $filename = shift;
@@ -4358,7 +4367,8 @@ sub process {
}
# check for global initialisers.
- if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) {
+ if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/ &&
+ !exclude_global_initialisers($realfile)) {
if (ERROR("GLOBAL_INITIALISERS",
"do not initialise globals to $1\n" . $herecurr) &&
$fix) {