[PATCH] drm: Do not use BUG_ON(!spin_is_locked())

[David Rientjes]

On Mon, 11 Aug 2014, sanjeev sharma wrote:

> Hello David,
> 
> Here is the old discussion carried out on this.
> 
> http://linux-kernel.2935.n7.nabble.com/Is-spin-is-locked-safe-to-use-with-BUG-ON-WARN-ON-td654800.html#a921802
> 

I'm suggesting that if you don't want to incur the cost of the conditional 
everytime you call a certain function with assert_spin_locked() that you 
could covert these to lockdep_assert_held() so the check is only done when 
lockdep is enabled for debugging.