Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> writes: > On Tue, Jun 12, 2018 at 09:23:19AM +0800, Huang, Ying wrote: >> Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> writes: >> >> +#else >> >> +static inline int __swap_duplicate_cluster(swp_entry_t *entry, >> > >> > This doesn't need inline. >> >> Why not? This is just a one line stub. > > Forgot to respond to this. The compiler will likely choose to optimize out > calls to an empty function like this. Checking, this is indeed what it does in > this case on my machine, with or without inline. Yes. I believe a decent compiler will inline the function in any way. And it does no harm to keep "inline" too, Yes? > By the way, when building without CONFIG_THP_SWAP, we get > > linux/mm/swapfile.c:933:13: warning: ‘__swap_free_cluster’ defined but not used [-Wunused-function] > static void __swap_free_cluster(struct swap_info_struct *si, unsigned long idx) > ^~~~~~~~~~~~~~~~~~~ Thanks! I will fix this. Don't know why 0-Day didn't catch this. Best Regards, Huang, Ying
