2021-09-14 12:12:24

by Ard Biesheuvel

Subject: [RFC PATCH 2/8] x86: add CPU field to struct thread_info

The CPU field will be moved back into thread_info even when
THREAD_INFO_IN_TASK is enabled, so add it back to x86's definition of
struct thread_info.

Signed-off-by: Ard Biesheuvel <[email protected]>
---
arch/x86/include/asm/thread_info.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index cf132663c219..ebec69c35e95 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -57,6 +57,9 @@ struct thread_info {
unsigned long flags; /* low level flags */
unsigned long syscall_work; /* SYSCALL_WORK_ flags */
u32 status; /* thread synchronous flags */
+#ifdef CONFIG_SMP
+ u32 cpu; /* current CPU */
+#endif
};

#define INIT_THREAD_INFO(tsk) \
--
2.30.2

2021-09-21 12:59:05

by Borislav Petkov

Subject: Re: [RFC PATCH 2/8] x86: add CPU field to struct thread_info

On Tue, Sep 14, 2021 at 02:10:30PM +0200, Ard Biesheuvel wrote:
> The CPU field will be moved back into thread_info even when
> THREAD_INFO_IN_TASK is enabled, so add it back to x86's definition of
> struct thread_info.
>
> Signed-off-by: Ard Biesheuvel <[email protected]>
> ---
> arch/x86/include/asm/thread_info.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
> index cf132663c219..ebec69c35e95 100644
> --- a/arch/x86/include/asm/thread_info.h
> +++ b/arch/x86/include/asm/thread_info.h
> @@ -57,6 +57,9 @@ struct thread_info {
> unsigned long flags; /* low level flags */
> unsigned long syscall_work; /* SYSCALL_WORK_ flags */
> u32 status; /* thread synchronous flags */
> +#ifdef CONFIG_SMP
> + u32 cpu; /* current CPU */
> +#endif
> };
>
> #define INIT_THREAD_INFO(tsk) \
> --

Acked-by: Borislav Petkov <[email protected]>

--
Regards/Gruss,
Boris.

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