Re: [PATCH 2/2] target: remove spin_lock_assert() in __target_(attach|detach)_tg_pt_gp()

[bigeasy@xxxxxxxxxxxxx]

On 2018-03-23 17:44:46 [+0000], Bart Van Assche wrote:
> On Fri, 2018-03-23 at 18:19 +0100, bigeasy@xxxxxxxxxxxxx wrote:
> > __target_attach_tg_pt_gp() and __target_detach_tg_pt_gp() check if the caller
> > holds lun_tg_pt_gp_lock(). Both functions are static, the callers are
> > acquiring the lock before the invocation of the function so the check
> > looks superfluous.
> > Remove it.
> 
> Does this check cause trouble to anyone or to a specific kernel configuration?
Those two do not.

> In other words, do we really need to remove these checks? I think that these
> checks are useful as documentation to people who read the SCSI target code.
> The target code is already hard to follow so I think any documentation,
> especially documentation in the form of code that is checked at runtime, is
> welcome.

so if I remove those two and add a kernel doc comment instead, saying
that the caller needs to ensure that "lun->lun_tg_pt_gp_lock" is held
then we would remove the obvious runtime check and add a piece of
documentation. Would that work?

> Thanks,
> 
> Bart.

Sebastian