Linux Kernel https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v4.18.2 2017-11-18T00:10:00Z 2017-11-18T00:10:00Z Alexey Dobriyan adobriyan@gmail.com 2017-11-17T23:26:52Z urn:sha1:0746a0bc6e6e76444098cf944848554d21d28cae Gcc doesn't know that "len" is guaranteed to be >=1 by dcache and generates standard while-loop prologue duplicating loop condition. add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-27 (-27) function old new delta name_to_int 104 77 -27 Link: http://lkml.kernel.org/r/20170912195213.GB17730@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2017-11-18T00:10:00Z Alexey Dobriyan adobriyan@gmail.com 2017-11-17T23:26:49Z urn:sha1:3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a Save ~360 bytes. add/remove: 1/0 grow/shrink: 0/4 up/down: 104/-463 (-359) function old new delta name_to_int - 104 +104 proc_pid_lookup 217 126 -91 proc_lookupfd_common 212 121 -91 proc_task_lookup 289 194 -95 __proc_create 588 402 -186 Link: http://lkml.kernel.org/r/20170912194850.GA17730@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>