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[3/6] fixdep: remove unneeded memcpy() in parse_dep_file()

Message ID 1515486650-1141-3-git-send-email-yamada.masahiro@socionext.com
State Superseded
Headers show
Series [1/6] fixdep: use malloc() and read() to load dep_file to buffer | expand

Commit Message

Masahiro Yamada Jan. 9, 2018, 8:30 a.m. UTC 
Each token in the depfile is copied to the temporary buffer 's' to
terminate the token with zero.  We do not need to do this any more
because the parsed buffer is now writable.  Insert '\0' directly in
the buffer without calling memcpy().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

 scripts/basic/fixdep.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

-- 
2.7.4
diff mbox series

Patch

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index f954f226..bc2364e 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -306,7 +306,6 @@  static void *load_file(const char *filename)
 static void parse_dep_file(char *m)
 {
 	char *p;
-	char s[PATH_MAX];
 	int is_last, is_target;
 	int saw_any_target = 0;
 	int is_first_dep = 0;
@@ -332,16 +331,14 @@  static void parse_dep_file(char *m)
 			/* The /next/ file is the first dependency */
 			is_first_dep = 1;
 		} else {
-			/* Save this token/filename */
-			memcpy(s, m, p-m);
-			s[p - m] = 0;
+			*p = '\0';
 
 			/* Ignore certain dependencies */
-			if (strrcmp(s, "include/generated/autoconf.h") &&
-			    strrcmp(s, "include/generated/autoksyms.h") &&
-			    strrcmp(s, "arch/um/include/uml-config.h") &&
-			    strrcmp(s, "include/linux/kconfig.h") &&
-			    strrcmp(s, ".ver")) {
+			if (strrcmp(m, "include/generated/autoconf.h") &&
+			    strrcmp(m, "include/generated/autoksyms.h") &&
+			    strrcmp(m, "arch/um/include/uml-config.h") &&
+			    strrcmp(m, "include/linux/kconfig.h") &&
+			    strrcmp(m, ".ver")) {
 				/*
 				 * Do not list the source file as dependency,
 				 * so that kbuild is not confused if a .c file
@@ -362,15 +359,15 @@  static void parse_dep_file(char *m)
 					if (!saw_any_target) {
 						saw_any_target = 1;
 						printf("source_%s := %s\n\n",
-							target, s);
+							target, m);
 						printf("deps_%s := \\\n",
 							target);
 					}
 					is_first_dep = 0;
 				} else
-					printf("  %s \\\n", s);
+					printf("  %s \\\n", m);
 
-				buf = load_file(s);
+				buf = load_file(m);
 				parse_config_file(buf);
 				free(buf);
 			}