linux-kernel - [PATCH v2] init: Do not warn on non-zero initcall return

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Date:	Wed, 01 May 2013 13:35:51 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH v2] init: Do not warn on non-zero initcall return

Commit f91eb62f71 "init: scream bloody murder if interrupts are enabled
too early" added three new warnings. The first two seemed reasonable,
but the third included a warning when an initcall returned non-zero.
Although, the third WARN() does include an imbalanced preempt disabled,
or irqs disable, it shouldn't warn if it only had an initcall that just
returns non-zero.

In fact, according to Linus, it shouldn't print at all. As it only
prints with initcall_debug set, and that already shows enough
information to fix things.

Link: http://lkml.kernel.org/r/CA+55aFzaBC5SFi7=F2mfm+KWY5qTsBmOqgbbs8E+LUS8JK-sBg@mail.gmail.com

Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

diff --git a/init/main.c b/init/main.c
index bea1287..ceed17a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -686,11 +686,8 @@ int __init_or_module do_one_initcall(initcall_t fn)
 
 	msgbuf[0] = 0;
 
-	if (ret && ret != -ENODEV && initcall_debug)
-		sprintf(msgbuf, "error code %d ", ret);
-
 	if (preempt_count() != count) {
-		strlcat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
+		sprintf(msgbuf, "preemption imbalance ");
 		preempt_count() = count;
 	}
 	if (irqs_disabled()) {


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