On Wed, Mar 29, 2017 at 12:25 PM, Jan Engelhardt <jeng...@inai.de> wrote: > > On Tuesday 2017-03-28 18:23, SIMRAN SINGHAL wrote: >>On Tue, Mar 28, 2017 at 7:24 PM, Jan Engelhardt <jeng...@inai.de> wrote: >>> On Tuesday 2017-03-28 15:13, simran singhal wrote: >>> >>>>Some functions like kmalloc/kzalloc return NULL on failure. When NULL >>>>represents failure, !x is commonly used. >>>> >>>>@@ -910,7 +910,7 @@ ip_vs_new_dest(struct ip_vs_service *svc, struct >>>>ip_vs_dest_user_kern *udest, >>>> } >>>> >>>> dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL); >>>>- if (dest == NULL) >>>>+ if (!dest) >>>> return -ENOMEM; >>> >>> This kind of transformation however is not cleanup anymore, it's really >>> bikeshedding and should be avoided. There are pro and cons for both >>> variants, and there is not really an overwhelming number of arguments >>> for either variant to justify the change. >> >>Sorry, but I didn't get what you are trying to convey. And particularly pros >>and >>cons of both variants. > > The ==NULL/!=NULL part sort of ensures that the left side is a pointer, which > is lost when just using the variable and have it implicitly convert to bool.
Thanks for the explaination!!!! But, according to me we should prefer != NULL over ==NULL according to coding style.
