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Message-ID: <CAMzpN2gFbJbrE_otDZYqYi+08hVorFzC1X362BV16RV2CTV1dQ@mail.gmail.com>
Date: Fri, 5 Aug 2016 12:13:04 -0400
From: Brian Gerst <brgerst@...il.com>
To: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...nel.org>,
"H . Peter Anvin" <hpa@...or.com>,
"the arch/x86 maintainers" <x86@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Andy Lutomirski <luto@...capital.net>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Steven Rostedt <rostedt@...dmis.org>,
Kees Cook <keescook@...omium.org>,
Peter Zijlstra <peterz@...radead.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Byungchul Park <byungchul.park@....com>
Subject: Re: [PATCH v2 13/44] x86/asm/head: remove useless zeroed word
On Thu, Aug 4, 2016 at 6:22 PM, Josh Poimboeuf <jpoimboe@...hat.com> wrote:
> This zeroed word has no apparent purpose, so remove it.
>
> Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
> ---
> arch/x86/kernel/head_64.S | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
> index 8822c20..ac6e27e 100644
> --- a/arch/x86/kernel/head_64.S
> +++ b/arch/x86/kernel/head_64.S
> @@ -326,7 +326,6 @@ ENDPROC(start_cpu0)
> .quad INIT_PER_CPU_VAR(irq_stack_union)
> GLOBAL(initial_stack)
> .quad init_thread_union+THREAD_SIZE-8
> - .word 0
> __FINITDATA
>
> bad_address:
FYI the word used to be the SS segment selector for the LSS
instruction, which isn't needed in 64-bit mode.
--
Brian Gerst
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