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authorJoe Perches <joe@perches.com>2019-12-04 16:52:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-04 19:44:13 -0800
commitcd28b119047b9928ddae914dd747f032ab929cc6 (patch)
tree370538dee17f0b9deec26ccd13a70a01c91b50bc /scripts/checkpatch.pl
parentd439e6a5d78b93a85c0f93ea559548fc109ccc1a (diff)
downloadlinux-stericsson-cd28b119047b9928ddae914dd747f032ab929cc6.tar.gz
checkpatch: reduce is_maintained_obsolete lookup runtime
The is_maintained_obsolete function can be called twice using the same filename. This function spawns a process using get_maintainer.pl. Store the status of each filename when spawned and use the stored result to eliminate the spawning of unnecessary duplicate child processes. Example: old: $ time ./scripts/checkpatch.pl hp100-Move-to-staging.patch > /dev/null real 0m1.767s user 0m1.634s sys 0m0.141s new: $ time ./scripts/checkpatch.pl hp100-Move-to-staging.patch > /dev/null real 0m1.184s user 0m1.085s sys 0m0.103s Link: http://lkml.kernel.org/r/b982566a2b9b4825badce36fdfc3032bd0005151.camel@perches.com Signed-off-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/checkpatch.pl')
-rwxr-xr-xscripts/checkpatch.pl8
1 files changed, 6 insertions, 2 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index da330b3ce140..7cbe6e72e363 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -874,14 +874,18 @@ sub seed_camelcase_file {
}
}
+our %maintained_status = ();
+
sub is_maintained_obsolete {
my ($filename) = @_;
return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl"));
- my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
+ if (!exists($maintained_status{$filename})) {
+ $maintained_status{$filename} = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
+ }
- return $status =~ /obsolete/i;
+ return $maintained_status{$filename} =~ /obsolete/i;
}
sub is_SPDX_License_valid {