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stddef: Introduce TRAILING_OVERLAP() helper macro
authorGustavo A. R. Silva <gustavoars@kernel.org>
Tue, 17 Jun 2025 19:05:36 +0000 (13:05 -0600)
committerKees Cook <kees@kernel.org>
Wed, 18 Jun 2025 21:30:53 +0000 (14:30 -0700)
commit29bb79e9dbf1ba100125e39deb7147acd490903f
tree247c540fe8a4ec7a83669f75c752aa80fffe968etree
parent4bfbc2691de8c869339090e851703209b17ba378commit | diff
stddef: Introduce TRAILING_OVERLAP() helper macro

Add new TRAILING_OVERLAP() helper macro to create a union between
a flexible-array member (FAM) and a set of members that would
otherwise follow it. This overlays the trailing members onto the
FAM while preserving the original memory layout.

Co-developed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/aFG8gEwKXAWWIvX0@kspp
Signed-off-by: Kees Cook <kees@kernel.org>
include/linux/stddef.h diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git