Add a few kernel version portability fixes

c-blake released this 15 Jan 16:41

· 24 commits to master since this release

803f7ec

Adapt to rename of __NR_syscall_max to NR_syscalls in Linux 5.14

Allow make V=whatever to override kernel sources to build against.

Also add BATCH_VERBOSE evar which if set to anything writes to stderr which mode is in effect.

Assets 2