Merge branch 'mm-nonmm-stable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

1 files changed, 20 insertions, 4 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 8a7787d228a6..3614cfe4dcbb 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -63,6 +63,7 @@ my $env_config_dir = 'CHECKPATCH_CONFIG_DIR';
 my $max_line_length = 100;
 my $ignore_perl_version = 0;
 my $spdx_cxx_comments = 0;
+my $userspace;
 my $minimum_perl_version = 5.10.0;
 my $min_conf_desc_length = 4;
 my $spelling_file = "$D/spelling.txt";
@@ -143,6 +144,7 @@ Options:
                              (required by old toolchains), allow also C++
                              comments (//).
                              NOTE: it should *not* be used for Linux mainline.
+  --userspace                Force rules specific for userspace.
   --codespell                Use the codespell dictionary for spelling/typos
                              (default:$codespellfile)
   --codespellfile            Use this codespell dictionary
@@ -358,6 +360,7 @@ GetOptions(
 	'codespell!'	=> \$codespell,
 	'codespellfile=s'	=> \$user_codespellfile,
 	'typedefsfile=s'	=> \$typedefsfile,
+	'userspace!'	=> \$userspace,
 	'color=s'	=> \$color,
 	'no-color'	=> \$color,	#keep old behaviors of -nocolor
 	'nocolor'	=> \$color,	#keep old behaviors of -nocolor
@@ -1206,6 +1209,8 @@ sub seed_camelcase_includes {
 		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";
+	} elsif (not defined $root) {
+		return;
 	} else {
 		my $last_mod_date = 0;
 		$files = `find $root/include -name "*.h"`;
@@ -2665,7 +2670,12 @@ sub exclude_global_initialisers {
 
 sub is_userspace {
     my ($realfile) = @_;
-    return ($realfile =~ m@^tools/@ || $realfile =~ m@^scripts/@);
+
+    return $userspace if (defined $userspace);
+
+    return ($realfile =~ m@^tools/@ ||
+		$realfile =~ m@^scripts/@ ||
+		$realfile =~ m@^arch/.*/tools/@);
 }
 
 sub process {
@@ -5946,6 +5956,8 @@ sub process {
 #Ignore SI style variants like nS, mV and dB
 #(ie: max_uV, regulator_min_uA_show, RANGE_mA_VALUE)
 			    $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
+#Ignore <inttypes.h> format macros (e.g. PRIu64, SCNu64)
+			    (is_userspace($realfile) ? $var !~ /^(?:PRI|SCN)[dioux][A-Z0-9]+$/ : 1) &&
 #Ignore some three character SI units explicitly, like MiB and KHz
 			    $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
 				while ($var =~ m{\b($Ident)}g) {
@@ -6684,7 +6696,8 @@ sub process {
 		}
 
 # prefer usleep_range over udelay
-		if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
+		if (!is_userspace($realfile) &&
+			$line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
 			my $delay = $1;
 			# ignore udelay's < 10, however
 			if (! ($delay < 10) ) {
@@ -6698,7 +6711,8 @@ sub process {
 		}
 
 # warn about unexpectedly long msleep's
-		if ($line =~ /\bmsleep\s*\((\d+)\);/) {
+		if (!is_userspace($realfile) &&
+			$line =~ /\bmsleep\s*\((\d+)\);/) {
 			if ($1 < 20) {
 				WARN("MSLEEP",
 				     "msleep < 20ms can sleep for up to 20ms; see function description of msleep().\n" . $herecurr);
@@ -6920,7 +6934,7 @@ sub process {
 
 # check for c99 types like uint8_t used outside of uapi/ and tools/
 		if ($realfile !~ m@\binclude/uapi/@ &&
-		    $realfile !~ m@\btools/@ &&
+		    !is_userspace($realfile) &&
 		    $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
 			my $type = $1;
 			if ($type =~ /\b($typeC99Typedefs)\b/) {
@@ -7170,6 +7184,7 @@ sub process {
 # check usleep_range arguments
 		if ($perl_version_ok &&
 		    defined $stat &&
+		    !is_userspace($realfile) &&
 		    $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
 			my $min = $1;
 			my $max = $7;
@@ -7413,6 +7428,7 @@ sub process {
 
 # check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
 		if ($realfile !~ m@^include/uapi/@ &&
+		    !is_userspace($realfile) &&
 		    $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
 			my $ull = "";
 			$ull = "_ULL" if (defined($1) && $1 =~ /ll/i);