[PATCH 2/9] ftrace, ia64: explictly ignore a file in recordmcount.pl

Steven Rostedt
2009-01-13T06:12:56Z

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From: Shaohua Li <shaohua.li@intel.com>

In IA64, a function pointer isn't a 'unsigned long' but a
'struct {unsigned long ip, unsigned long gp}'. MCOUNT_ADDR is determined
at link time not compile time, so explictly ignore kernel/trace/ftrace.o
in recordmcount.pl.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
kernel/trace/ftrace.c | 10 +---------
scripts/recordmcount.pl | 5 +++++
2 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 9e54a6c..76bb884 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -263,14 +263,6 @@ static void ftrace_update_pid_func(void)
# error Dynamic ftrace depends on MCOUNT_RECORD
#endif

-/*
- * Since MCOUNT_ADDR may point to mcount itself, we do not want
- * to get it confused by reading a reference in the code as we
- * are parsing on objcopy output of text. Use a variable for
- * it instead.
- */
-static unsigned long mcount_addr = MCOUNT_ADDR;
-
enum {
FTRACE_ENABLE_CALLS = (1 << 0),
FTRACE_DISABLE_CALLS = (1 << 1),
@@ -575,7 +567,7 @@ ftrace_code_disable(struct module *mod, struct dyn_ftrace *rec)

ip = rec->ip;

- ret = ftrace_make_nop(mod, rec, mcount_addr);
+ ret = ftrace_make_nop(mod, rec, MCOUNT_ADDR);
if (ret) {
ftrace_bug(ret, ip);
rec->flags |= FTRACE_FL_FAILED;
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index 282485a..070042b 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -109,6 +109,11 @@ if ($#ARGV < 7) {
my ($arch, $bits, $objdump, $objcopy, $cc,
$ld, $nm, $rm, $mv, $is_module, $inputfile) = @ARGV;

+# This file refers to mcount and shouldn't be ftraced, so lets' ignore it
+if ($inputfile eq "kernel/trace/ftrace.o") {
+ exit(0);
+}
+
# Acceptable sections to record.
my %text_sections = (
".text" => 1,
--
1.5.6.5

--