array-bounds updates for v5.18-rc1

- Enable -Warray-bounds globally
 
 - Enable -Wzero-length-bounds globally
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Merge tag 'array-bounds-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull array-bounds updates from Kees Cook:
 "This enables -Warray-bounds and -Wzero-length-bounds, now that the
  many bug fixes have landed all over the place in the kernel, and in
  GCC itself[1].

  A couple fixes[2] for known corner-case issues currently live in my
  "pending-fixes" tree which I'm expecting to send next week if other
  maintainers still haven't picked them up.

  I'm also expecting we can enable -Wstringop-overflow next cycle, as
  there are only a few stragglers[3], but it might even be possible for
  this release"

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578
[2] https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?h=for-next/pending-fixes&id=2d253138910eec553fc706379914243d71de9b85
[3] https://github.com/KSPP/linux/issues/181

* tag 'array-bounds-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  Makefile: Enable -Wzero-length-bounds
  Makefile: Enable -Warray-bounds

Makefile

@@ -952,8 +952,6 @@ KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
 
 # We'll want to enable this eventually, but it's not going away for 5.7 at least
-KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
-KBUILD_CFLAGS += -Wno-array-bounds
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
 
 # Another good warning that we'll want to enable eventually