Merge branch 'mlog_replace_for_39' of git://repo.or.cz/taoma-kernel into ocfs2-merge-window-fix

1 files changed, 19 insertions, 2 deletions

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index c9a16ab..291228e 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -309,12 +309,18 @@ static void do_config_file(const char *filename)
 	close(fd);
 }
 
+/*
+ * Important: The below generated source_foo.o and deps_foo.o variable
+ * assignments are parsed not only by make, but also by the rather simple
+ * parser in scripts/mod/sumversion.c.
+ */
 static void parse_dep_file(void *map, size_t len)
 {
 	char *m = map;
 	char *end = m + len;
 	char *p;
 	char s[PATH_MAX];
+	int first;
 
 	p = strchr(m, ':');
 	if (!p) {
@@ -322,11 +328,11 @@ static void parse_dep_file(void *map, size_t len)
 		exit(1);
 	}
 	memcpy(s, m, p-m); s[p-m] = 0;
-	printf("deps_%s := \\\n", target);
 	m = p+1;
 
 	clear_config();
 
+	first = 1;
 	while (m < end) {
 		while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
 			m++;
@@ -340,9 +346,20 @@ static void parse_dep_file(void *map, size_t len)
 		if (strrcmp(s, "include/generated/autoconf.h") &&
 		    strrcmp(s, "arch/um/include/uml-config.h") &&
 		    strrcmp(s, ".ver")) {
-			printf("  %s \\\n", s);
+			/*
+			 * Do not list the source file as dependency, so that
+			 * kbuild is not confused if a .c file is rewritten
+			 * into .S or vice versa. Storing it in source_* is
+			 * needed for modpost to compute srcversions.
+			 */
+			if (first) {
+				printf("source_%s := %s\n\n", target, s);
+				printf("deps_%s := \\\n", target);
+			} else
+				printf("  %s \\\n", s);
 			do_config_file(s);
 		}
+		first = 0;
 		m = p + 1;
 	}
 	printf("\n%s: $(deps_%s)\n\n", target, target);