kbuild: use warn()/fatal() consistent in modpost

modpost.c provides warn() and fatal() - so use them all over the place.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
index 43271a1..5c07545 100644
--- a/scripts/mod/sumversion.c
+++ b/scripts/mod/sumversion.c
@@ -316,8 +316,7 @@
 
 	file = grab_file(cmd, &flen);
 	if (!file) {
-		fprintf(stderr, "Warning: could not find %s for %s\n",
-			cmd, objfile);
+		warn("could not find %s for %s\n", cmd, objfile);
 		goto out;
 	}
 
@@ -355,9 +354,8 @@
 		/* Check if this file is in same dir as objfile */
 		if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
 			if (!parse_file(line, md)) {
-				fprintf(stderr,
-					"Warning: could not open %s: %s\n",
-					line, strerror(errno));
+				warn("could not open %s: %s\n",
+				     line, strerror(errno));
 				goto out_file;
 			}
 
@@ -397,23 +395,20 @@
 
 	file = grab_file(filelist, &len);
 	if (!file) {
-		fprintf(stderr, "Warning: could not find versions for %s\n",
-			filelist);
+		warn("could not find versions for %s\n", filelist);
 		return;
 	}
 
 	sources = strchr(file, '\n');
 	if (!sources) {
-		fprintf(stderr, "Warning: malformed versions file for %s\n",
-			modname);
+		warn("malformed versions file for %s\n", modname);
 		goto release;
 	}
 
 	sources++;
 	end = strchr(sources, '\n');
 	if (!end) {
-		fprintf(stderr, "Warning: bad ending versions file for %s\n",
-			modname);
+		warn("bad ending versions file for %s\n", modname);
 		goto release;
 	}
 	*end = '\0';
@@ -438,19 +433,19 @@
 
 	fd = open(filename, O_RDWR);
 	if (fd < 0) {
-		fprintf(stderr, "Warning: changing sum in %s failed: %s\n",
+		warn("changing sum in %s failed: %s\n",
 			filename, strerror(errno));
 		return;
 	}
 
 	if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
-		fprintf(stderr, "Warning: changing sum in %s:%lu failed: %s\n",
+		warn("changing sum in %s:%lu failed: %s\n",
 			filename, offset, strerror(errno));
 		goto out;
 	}
 
 	if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) {
-		fprintf(stderr, "Warning: writing sum in %s failed: %s\n",
+		warn("writing sum in %s failed: %s\n",
 			filename, strerror(errno));
 		goto out;
 	}