As it seems to be rather unclear if/when to use BUG(), BUG_ON(),
VM_BUG_ON(), WARN_ON_ONCE(), ... let's try to document the result of a
recent discussion.

Details can be found in patch #1.

RFC -> v1:
* "coding-style.rst: document BUG() and WARN() rules ("do not crash the
   kernel")"
 -> Rephrase/extend according to John
 -> Add some details regarding the use of panic()
* powerpc/prom_init: drop PROM_BUG()
 -> Added
* "checkpatch: warn on usage of VM_BUG_ON() and other BUG variants"
 -> Warn on more variants


Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: David Laight <redacted>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <redacted>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <redacted>

David Hildenbrand (3):
  coding-style.rst: document BUG() and WARN() rules ("do not crash the
    kernel")
  powerpc/prom_init: drop PROM_BUG()
  checkpatch: warn on usage of VM_BUG_ON() and other BUG variants

 Documentation/process/coding-style.rst | 61 ++++++++++++++++++++++++++
 arch/powerpc/kernel/prom_init.c        |  6 ---
 scripts/checkpatch.pl                  |  6 +--
 3 files changed, 64 insertions(+), 9 deletions(-)

-- 
2.37.3