linux-kernel - [PATCH] fix blk-exec.c compile error: always define 'sysctl_hung_task_timeout

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Message-ID: <1285364797.12723.1.camel@corey>
Date:	Fri, 24 Sep 2010 17:46:37 -0400
From:	Mark Lord <mlord@...ox.com>
To:	Vivek Goyal <vgoyal@...hat.com>, Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, hch@....de,
	IDE/ATA development list <linux-ide@...r.kernel.org>
Subject: [PATCH] fix blk-exec.c compile error: always define
 'sysctl_hung_task_timeout_secs' (resend)

Ensure that 'sysctl_hung_task_timeout_secs' is defined
even when CONFIG_DETECT_HUNG_TASK is not set.
This way we can safely reference it without need for
ifdefs in the code elsewhere.  eg. in block/blk-exec.c

Signed-off-by: Mark Lord <mlord@...ox.com>

(Resending from a repaired email client.)
Jens: my apologies for not catching this this earlier.

--- a/include/linux/sched.h	2010-09-20 19:56:53.000000000 -0400
+++ b/include/linux/sched.h	2010-09-24 17:22:01.707291995 -0400
@@ -336,6 +336,9 @@
 extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
 					 void __user *buffer,
 					 size_t *lenp, loff_t *ppos);
+#else
+/* Avoid need for ifdefs elsewhere in the code */
+enum { sysctl_hung_task_timeout_secs = 0 };
 #endif
 
 /* Attach to any functions which should be ignored in wchan output. */



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