27 lines
854 B
Diff
27 lines
854 B
Diff
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From fb22714ae934a6a9b8ab0cc635519fb3a24c2052 Mon Sep 17 00:00:00 2001
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From: Weinan Liu <wnliu@google.com>
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Date: Wed, 9 Aug 2023 22:31:21 +0000
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Subject: [PATCH] Fix undefined behavior problem when using list_foreach_entry
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This upstream list.h offsetof implementation rely on undefined behavior implementation. Using __builtin_offsetof to fix this problem.
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---
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kpatch-build/list.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/kpatch-build/list.h b/kpatch-build/list.h
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index e95593c..ad4643c 100644
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--- a/kpatch-build/list.h
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+++ b/kpatch-build/list.h
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@@ -30,7 +30,7 @@
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/**
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* Get offset of a member
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*/
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-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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+#define offsetof(TYPE, MEMBER) ((size_t) __builtin_offsetof(TYPE, MEMBER))
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/**
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* Casts a member of a structure out to the containing structure
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--
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2.27.0
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