2 files changed, 21 insertions, 3 deletions

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 4d03a7efc689..4db60b2e2a76 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -210,7 +210,7 @@ endif
 
 ifdef CONFIG_FTRACE_MCOUNT_RECORD
 ifdef BUILD_C_RECORDMCOUNT
-cmd_record_mcount = $(srctree)/scripts/recordmcount "$(@)";
+cmd_record_mcount = $(objtree)/scripts/recordmcount "$(@)";
 else
 cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index 7f7f7180fe24..26e1271259ba 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -313,12 +313,30 @@ do_file(char const *const fname)
 int
 main(int argc, char const *argv[])
 {
+        const char ftrace[] = "kernel/trace/ftrace.o";
+        int ftrace_size = sizeof(ftrace) - 1;
         int n_error = 0;  /* gcc-4.3.0 false positive complaint */
-        if (argc <= 1)
+
+        if (argc <= 1) {
                 fprintf(stderr, "usage: recordmcount file.o...\n");
-        else  /* Process each file in turn, allowing deep failure. */
+                return 0;
+        }
+
+        /* Process each file in turn, allowing deep failure. */
         for (--argc, ++argv; 0 < argc; --argc, ++argv) {
                 int const sjval = setjmp(jmpenv);
+                int len;
+
+                /*
+                 * The file kernel/trace/ftrace.o references the mcount
+                 * function but does not call it. Since ftrace.o should
+                 * not be traced anyway, we just skip it.
+                 */
+                len = strlen(argv[0]);
+                if (len >= ftrace_size &&
+                    strcmp(argv[0] + (len - ftrace_size), ftrace) == 0)
+                        continue;
+
                 switch (sjval) {
                 default: {
                         fprintf(stderr, "internal error: %s\n", argv[0]);