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Date: Thu, 3 Sep 2020 15:42:13 -0700
From: Kees Cook <>
To: Sami Tolvanen <>
Cc: Masahiro Yamada <>, Will Deacon <>,
	Peter Zijlstra <>,
	Steven Rostedt <>,
	Greg Kroah-Hartman <>,
	"Paul E. McKenney" <>,
	Nick Desaulniers <>,,,,,,,,
Subject: Re: [PATCH v2 17/28] PCI: Fix PREL32 relocations for LTO

On Thu, Sep 03, 2020 at 01:30:42PM -0700, Sami Tolvanen wrote:
> With Clang's Link Time Optimization (LTO), the compiler can rename
> static functions to avoid global naming collisions. As PCI fixup
> functions are typically static, renaming can break references
> to them in inline assembly. This change adds a global stub to
> DECLARE_PCI_FIXUP_SECTION to fix the issue when PREL32 relocations
> are used.
> Signed-off-by: Sami Tolvanen <>

Reviewed-by: Kees Cook <>

Kees Cook

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