checkpatch: make git output use LANGUAGE=en_US.utf8

git output parsing depends on the language being en_US english.

Make the backtick execution of all `git <foo>` commands set the
LANGUAGE of the process to en_US.utf8 before executing the actual
command using `export LANGUAGE=en_US.utf8; git <foo>`.

Because the command is executed in a child process, the parent
LANGUAGE is unchanged.

Link: http://lkml.kernel.org/r/bb9f29988f3258281956680ff39c3e19e37dc0b8.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Tested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4b25a94cfc36..4eb355d8ae73 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -62,6 +62,8 @@ my $conststructsfile = "$D/const_structs.checkpatch";
 my $typedefsfile = "";
 my $color = "auto";
 my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
+# git output parsing needs US English output, so first set backtick child process LANGUAGE
+my $git_command ='export LANGUAGE=en_US.UTF-8; git';
 
 sub help {
         my ($exitcode) = @_;
@@ -904,7 +906,7 @@ sub seed_camelcase_includes {
         $camelcase_seeded = 1;
 
         if (-e ".git") {
-                my $git_last_include_commit = `git log --no-merges --pretty=format:"%h%n" -1 -- include`;
+                my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`;
                 chomp $git_last_include_commit;
                 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
         } else {
@@ -932,7 +934,7 @@ sub seed_camelcase_includes {
         }
 
         if (-e ".git") {
-                $files = `git ls-files "include/*.h"`;
+                $files = `${git_command} ls-files "include/*.h"`;
                 @include_files = split('\n', $files);
         }
 
@@ -956,7 +958,7 @@ sub git_commit_info {
 
         return ($id, $desc) if ((which("git") eq "") || !(-e ".git"));
 
-        my $output = `git log --no-color --format='%H %s' -1 $commit 2>&1`;
+        my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`;
         $output =~ s/^\s*//gm;
         my @lines = split("\n", $output);
 
@@ -1006,7 +1008,7 @@ if ($git) {
                 } else {
                         $git_range = "-1 $commit_expr";
                 }
-                my $lines = `git log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
+                my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
                 foreach my $line (split(/\n/, $lines)) {
                         $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
                         next if (!defined($1) || !defined($2));