On Thu, Aug 10, 2017 at 01:13:22PM -0700, Laura Abbott wrote: > Fedora rawhide recently upgraded to binutils 2.29 and this seems > to produce new warnings: > > ./arch/arm64/include/asm/assembler.h: Assembler messages: > ./arch/arm64/include/asm/assembler.h:125: Warning: ignoring attempt to > redefine built-in register 'lr' > > This is > > /* > * Register aliases. > */ > lr .req x30 // link register
Strange, does gas now think 'lr' is a general purpose register (aliased to x30)? It never was and IIRC the toolchain people many years ago refused to add it, hence the alias above in the kernel. I wonder if they added 'fp' as well... We could remove the alias and replace all 'lr' instances with 'x30' throughout the kernel (no too many) or we add some #ifdef around the above based on the binutils version. -- Catalin
