Noisy Sparse warnings

[Steve French]

I have been getting the following sparse warnings repeatedly on my
current Ubutu (17.10) when compiling the current mainline kernel:

./arch/x86/include/asm/nospec-branch.h:144:38: warning: Unknown escape '@'
./include/linux/string.h:239:1: error: attribute 'gnu_inline': unknown attribute

I get the same sparse error whether I use the default sparse that
Ubuntu ships (0.5.0) or the current sparse (0.5.2-rc1)

Ideas?


-- 
Thanks,

Steve