[PATCH v2 0/2] Lock and Pointer guards

[Peter Zijlstra]

By popular demand, a new and improved version :-)

New since -v1 ( https://lkml.kernel.org/r/20230526150549.250372621@xxxxxxxxxxxxx )

 - much improved interface for lock guards: guard() and scoped () { }
   as suggested by Linus.
 - moved the ';' for the 'last' additional guard members into the definition
   as suggested by Kees.
 - put __cleanup in the right place with the suggested comment
   as suggested by Kees and Miguel
 - renamed the definition macros DEFINE_LOCK_GUARD_[012] to indicate
   the number of arguments the lock function takes
 - added comments to guards.h
 - renamed pretty much all guard types

Again compile and boot tested x86_64-defconfig