sparse warnings on undeclared asmlinkage

From: Ben Dooks
Date: Fri Oct 11 2019 - 12:19:02 EST

I was reviewing the sparse output for the current kernel release and
note there are a number of warnings about un-declared functions which
are only used for code in assembly.

I was wondering if we should just ignore those, and have either a
new attribute for "undeclared is ok" or to make spare just ignore
anything with the syscall_linkage attribute?

Ben Dooks
Senior Engineer Codethink - Providing Genius