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Re: [PATCH 3/8] x86/boot: Fix data placement around __high_start()
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 2 Dec 2021 12:49:02 +0100
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 02 Dec 2021 11:49:34 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 30.11.2021 11:04, Andrew Cooper wrote:
> multiboot_ptr should be in __initdata - it is only used on the BSP path.
> Furthermore, the .align 8 then .long means that stack_start is misaligned.
>
> Move both into setup.c, which lets the compiler handle the details correctly,
> as well as providling proper debug information for them.
>
> Declare stack_start in setup.h and avoid extern-ing it locally in smpboot.c.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Nevertheless I'd like to state that defining a variable in C when all
its uses are in assembly seems a little odd to me.
Jan
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