kbuild: do not print extra logs for V=2

Some scripts increase the verbose level when V=1, but others when
not V=0.

I think the former is correct because V=2 is not a log level but
a switch to print the reason for rebuilding.

Signed-off-by: Masahiro Yamada <[e-mail]>
Reviewed-by: Nicolas Schier <[e-mail]>

Documentation/Makefile

···
 PDFLATEX      = xelatex
 LATEXOPTS     = -interaction=batchmode -no-shell-escape
 
-ifeq ($(KBUILD_VERBOSE),0)
+ifeq ($(findstring 1, $(KBUILD_VERBOSE)),)
 SPHINXOPTS    += "-q"
 endif
 

arch/powerpc/kernel/prom_init_check.sh

···
 	# a leading . on the name, so strip it off here.
 	UNDEF="${UNDEF#.}"
 
-	if [ $KBUILD_VERBOSE ]; then
-		if [ $KBUILD_VERBOSE -ne 0 ]; then
-			echo "Checking prom_init.o symbol '$UNDEF'"
-		fi
-	fi
+	case "$KBUILD_VERBOSE" in
+	*1*)
+		echo "Checking prom_init.o symbol '$UNDEF'" ;;
+	esac
 
 	OK=0
 	for WHITE in $WHITELIST

certs/extract-cert.c

···
 static const char *key_pass;
 static BIO *wb;
 static char *cert_dst;
-static int kbuild_verbose;
+static bool verbose;
 
 static void write_cert(X509 *x509)
 {
···
 	}
 	X509_NAME_oneline(X509_get_subject_name(x509), buf, sizeof(buf));
 	ERR(!i2d_X509_bio(wb, x509), "%s", cert_dst);
-	if (kbuild_verbose)
+	if (verbose)
 		fprintf(stderr, "Extracted cert: %s\n", buf);
 }
 
 int main(int argc, char **argv)
 {
 	char *cert_src;
+	char *verbose_env;
 
 	OpenSSL_add_all_algorithms();
 	ERR_load_crypto_strings();
 	ERR_clear_error();
 
-	kbuild_verbose = atoi(getenv("KBUILD_VERBOSE")?:"0");
+	verbose_env = getenv("KBUILD_VERBOSE");
+	if (verbose_env && strchr(verbose_env, '1'))
+		verbose = true;
 
         key_pass = getenv("KBUILD_SIGN_PIN");
 

scripts/asn1_compiler.c

···
 	int fd;
 
 	kbuild_verbose = getenv("KBUILD_VERBOSE");
-	if (kbuild_verbose)
-		verbose_opt = atoi(kbuild_verbose);
+	if (kbuild_verbose && strchr(kbuild_verbose, '1'))
+		verbose_opt = true;
 
 	while (argc > 4) {
 		if (strcmp(argv[1], "-v") == 0)

scripts/kernel-doc

···
 my ($type, $declaration_name, $return_type);
 my ($newsection, $newcontents, $prototype, $brcount, %source_map);
 
-if (defined($ENV{'KBUILD_VERBOSE'})) {
-	$verbose = "$ENV{'KBUILD_VERBOSE'}";
+if (defined($ENV{'KBUILD_VERBOSE'}) && $ENV{'KBUILD_VERBOSE'} =~ '1') {
+	$verbose = 1;
 }
 
 if (defined($ENV{'KCFLAGS'})) {