Re: [PATCH] RCU: don't turn off lockdep when find suspiciousrcu_dereference_check() usage

[Eric Paris]

On Tue, 2010-04-20 at 16:23 +0800, Lai Jiangshan wrote:

> [PATCH] RCU: don't turn off lockdep when find suspicious rcu_dereference_check() usage
> 
> When suspicious rcu_dereference_check() usage is detected, lockdep is still
> available actually, so we should not call debug_locks_off() in
> lockdep_rcu_dereference().
> 
> For get rid of too much "suspicious rcu_dereference_check() usage"
> output when the "if(!debug_locks_off())" statement is removed. This patch uses
> static variable '__warned's for very usage of "rcu_dereference*()".
> 
> One variable per usage, so, Now, we can get multiple complaint
> when we detect multiple different suspicious rcu_dereference_check() usage.
> 
> Requested-by: Eric Paris <eparis@xxxxxxxxxx>
> Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>

Although mine was a linux-next kernel and it doesn't appear that I have
rcu_dereference_protected() at all, so I dropped that bit of the patch,
it worked great!  I got 4 more complaints to harass people with.  Feel
free to add my tested by if you care to.

Tested-by: Eric Paris <eparis@xxxxxxxxxx>

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