Re: [PATCH] drivers: staging: lustre: fix sparse warnings / delete unused function

[Oleg Drokin <green@linuxhacker.ru>]

On Aug 11, 2014, at 9:58 PM, Oleg Drokin wrote:

> 
> On Aug 10, 2014, at 12:34 AM, Greg KH wrote:
>> Very odd, with this patch applied, I now get a build warning:
>> 
>> drivers/staging/lustre/lnet/lnet/config.c: In function ‘lnet_parse_ip2nets’:
>> drivers/staging/lustre/lnet/lnet/config.c:1193:2: warning: ‘ipaddrs’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>> lnet_ipaddr_free_enumeration(ipaddrs, nip);
>> ^
> 
> What's even more odd is that the very previous line also uses ipaddrs, yet it does not trigger the warning.
> In any case I believe it's a false positive, since the only way it could remain unitialized is if
> libcfs_ipif_enumerate returned negative value (stored in nif in this function) and we check for it being more than zero
> before getting to that part of code.
> 
> I'll submit a patch assigning ipaddrs to NULL as a workaround shortly.

Err, looking at the wrong function there, it's lnet_ipaddr_enumerate that returns negative if ipaddrs was not changed.
Anyway still false positive.