linux-kernel - [PATCH 0/2] Add __counted_by

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Message-ID: <20251121193957.1655580-1-morbo@google.com>
Date: Fri, 21 Nov 2025 19:39:42 +0000
From: Bill Wendling <morbo@...gle.com>
To: linux-kernel@...r.kernel.org
Cc: Bill Wendling <morbo@...gle.com>, Kees Cook <kees@...nel.org>, 
	"Gustavo A. R. Silva" <gustavoars@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>, Justin Stitt <justinstitt@...gle.com>, 
	linux-hardening@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH 0/2] Add __counted_by_ptr macro

These patches add the __counted_by_ptr macro and then uses it in
mm/memblock.h. The name of the __counted_by_ptr attribute is the same as
__counted_by, but two different macros are needed, because of feature
skew in GCC and clang. Once the minmum versions of the compilers support
'counted_by' on both flexible array members and pointers in structs,
this macro will become obsolete.

Bill Wendling (2):
  Compiler Attributes: Add __counted_by_ptr macro
  memblock: annotate struct memblock_type with __counted_by_ptr

 include/linux/compiler_types.h | 11 +++++++++++
 include/linux/memblock.h       |  2 +-
 init/Kconfig                   |  5 +++++
 3 files changed, 17 insertions(+), 1 deletion(-)

-- 
2.52.0.rc2.455.g230fcf2819-goog