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Date: Thu, 3 Sep 2020 15:46:09 -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 26/28] x86, vdso: disable LTO only for vDSO

On Thu, Sep 03, 2020 at 01:30:51PM -0700, Sami Tolvanen wrote:
> Remove the undefined DISABLE_LTO flag from the vDSO, and filter out
> CC_FLAGS_LTO flags instead where needed. Note that while we could use
> Clang's LTO for the 64-bit vDSO, it won't add noticeable benefit for
> the small amount of C code.
> Signed-off-by: Sami Tolvanen <>


Reviewed-by: Kees Cook <>

Kees Cook

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