What is "#define alloc_ieee80211 alloc_ieee80211_rsl"?

[John Whitmore]

On Tue, Oct 09, 2018 at 08:07:08PM +0100, John Whitmore wrote:
> Sorry I know what a #define is doing, but in this case I've no idea
> why it's used and what it's trying to achieve.
> 
> This is from the rtl8192u driver in staging, where the alloc function
> (alloc_ieee80211) which is called by the probe function
> (rtl8192_usb_probe). So that's all good but a quick grep through the
> code and in the file drivers/staging/rtl8192u/ieee80211/ieee80211.h
> there's a line which defines that function as another function '_rsl'
> which don't exist anywhere in Kernel.
> 
> #define alloc_ieee80211			alloc_ieee80211_rsl
> 
> So what am I missing or why are a number of functions being redefined
> as another name, which doesn't exist?
> 
> I'm tempted to remove any that don't exist but I should really find
> out what it is the lines are doing.

I should have held off for a few minutes. I removed all the '_rsl'
defines from the code and the module re-builds so I think I'll just
submit a patch. Unless somebody has a good reason not to.