init/main.c: fix warning: 'calltime.tv64' may be used uninitialized

Using:

	gcc (GCC) 4.5.0 20100610 (prerelease)

The following warning appears:

	init/main.c: In function `do_one_initcall':
	init/main.c:730:10: warning: `calltime.tv64' may be used uninitialized in this function

This warning is actually correct, as the global initcall_debug could
arguably be changed by the initcall.

Correct this warning by extracting a new function, do_one_initcall_debug,
that performs the initcall for the debug case.

Signed-off-by: Kevin Winchester <kjwinchester@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 20 insertions, 14 deletions

diff --git a/init/main.c b/init/main.c
index b8b6effe9ff4..dbee132923c5 100644
--- a/init/main.c
+++ b/init/main.c
@@ -721,27 +721,33 @@ core_param(initcall_debug, initcall_debug, bool, 0644);
 
 static char msgbuf[64];
 
-int do_one_initcall(initcall_t fn)
+static int do_one_initcall_debug(initcall_t fn)
 {
-        int count = preempt_count();
         ktime_t calltime, delta, rettime;
         unsigned long long duration;
         int ret;
 
-        if (initcall_debug) {
-                printk("calling  %pF @ %i\n", fn, task_pid_nr(current));
-                calltime = ktime_get();
-        }
-
+        printk(KERN_DEBUG "calling  %pF @ %i\n", fn, task_pid_nr(current));
+        calltime = ktime_get();
         ret = fn();
+        rettime = ktime_get();
+        delta = ktime_sub(rettime, calltime);
+        duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+        printk(KERN_DEBUG "initcall %pF returned %d after %lld usecs\n", fn,
+                ret, duration);
 
-        if (initcall_debug) {
-                rettime = ktime_get();
-                delta = ktime_sub(rettime, calltime);
-                duration = (unsigned long long) ktime_to_ns(delta) >> 10;
-                printk("initcall %pF returned %d after %lld usecs\n", fn,
-                        ret, duration);
-        }
+        return ret;
+}
+
+int do_one_initcall(initcall_t fn)
+{
+        int count = preempt_count();
+        int ret;
+
+        if (initcall_debug)
+                ret = do_one_initcall_debug(fn);
+        else
+                ret = fn();
 
         msgbuf[0] = 0;