scripts: get_abi.pl: ignore some sysfs nodes earlier

When checking for undefined symbols, some nodes aren't easy
or don't make sense to be checked right now. Prevent allocating
memory for those, as they'll be ignored anyway.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/5228789cbef8241d44504ad29fca5cab356cdc53.1632411447.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/scripts/get_abi.pl b/scripts/get_abi.pl
index 3c0063d..42eb16e 100755 (executable)
--- a/scripts/get_abi.pl
+++ b/scripts/get_abi.pl
@@ -628,6 +628,14 @@ sub parse_existing_sysfs {
        # Ignore cgroup and firmware
        return if ($file =~ m#^/sys/(fs/cgroup|firmware)/#);
 
+       # Ignore some sysfs nodes
+       return if ($file =~ m#/(sections|notes)/#);
+
+       # Would need to check at
+       # Documentation/admin-guide/kernel-parameters.txt, but this
+       # is not easily parseable.
+       return if ($file =~ m#/parameters/#);
+
        my $mode = (lstat($file))[2];
        my $abs_file = abs_path($file);
 
@@ -709,14 +717,6 @@ sub check_undefined_symbols {
 
                next if ($exact);
 
-               # Ignore some sysfs nodes
-               next if ($file =~ m#/(sections|notes)/#);
-
-               # Would need to check at
-               # Documentation/admin-guide/kernel-parameters.txt, but this
-               # is not easily parseable.
-               next if ($file =~ m#/parameters/#);
-
                if ($hint && $defined && (!$search_string || $found_string)) {
                        $what =~ s/\xac/\n\t/g;
                        if ($leave ne "others") {