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...te Reported-by: kernel test robot <lkp at intel.com> All errors (new ones prefixed by >>): kernel/locking/lock_events.c:61:16: warning: no previous prototype for 'lockevent_read' [-Wmissing-prototypes] 61 | ssize_t __weak lockevent_read(struct file *file, char __user *user_buf, | ^~~~~~~~~~~~~~ kernel/locking/lock_events.c: In function 'skip_lockevent': >> kernel/locking/lock_events.c:126:12: error: implicit declaration of function 'pv_is_native_spin_unlock' [-Werror=implicit-function-declaration] 126 | pv_on = !pv_...

Hi, Here is my patch queue I accumulated over quite a long time. Patches 1-6 are bugfixes, and rest is mostly RFC. Comments are welcome. Best regards, Maxim Levitsky

This series adds an option to use queued spinlocks for powerpc, and makes it the default for the Book3S-64 subarch. This effort starts with the generic code so it's very simple but still very performant. There are optimisations that can be made to slowpaths, but I think it's better to attack those incrementally if/when we find things, and try to add the improvements to generic code as