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Message-ID: <ZegL9nbKpWe3GM0_@kernel.org>
Date: Wed, 6 Mar 2024 08:23:50 +0200
From: Mike Rapoport <rppt@...nel.org>
To: peterx@...hat.com
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Christophe Leroy <christophe.leroy@...roup.eu>, x86@...nel.org,
"Kirill A . Shutemov" <kirill@...temov.name>,
Jason Gunthorpe <jgg@...dia.com>, Yang Shi <shy828301@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
linuxppc-dev@...ts.ozlabs.org, Muchun Song <muchun.song@...ux.dev>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>
Subject: Re: [PATCH v3 04/10] mm/x86: Replace pgd_large() with pgd_leaf()
On Tue, Mar 05, 2024 at 12:37:44PM +0800, peterx@...hat.com wrote:
> From: Peter Xu <peterx@...hat.com>
>
> pgd_leaf() is a global API while pgd_large() is not. Always use
> the global pgd_leaf(), then drop pgd_large().
>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: x86@...nel.org
> Signed-off-by: Peter Xu <peterx@...hat.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>
> ---
> arch/x86/include/asm/pgtable.h | 4 ++--
> arch/x86/mm/pti.c | 2 +-
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
> index 69ed0ea0641b..d6e993a5659f 100644
> --- a/arch/x86/include/asm/pgtable.h
> +++ b/arch/x86/include/asm/pgtable.h
> @@ -1418,8 +1418,8 @@ static inline bool pgdp_maps_userspace(void *__ptr)
> return (((ptr & ~PAGE_MASK) / sizeof(pgd_t)) < PGD_KERNEL_START);
> }
>
> -#define pgd_leaf pgd_large
> -static inline int pgd_large(pgd_t pgd) { return 0; }
> +#define pgd_leaf pgd_leaf
> +static inline int pgd_leaf(pgd_t pgd) { return 0; }
>
> #ifdef CONFIG_PAGE_TABLE_ISOLATION
> /*
> diff --git a/arch/x86/mm/pti.c b/arch/x86/mm/pti.c
> index dc0a81f5f60e..c17aab24c1b3 100644
> --- a/arch/x86/mm/pti.c
> +++ b/arch/x86/mm/pti.c
> @@ -185,7 +185,7 @@ static p4d_t *pti_user_pagetable_walk_p4d(unsigned long address)
>
> set_pgd(pgd, __pgd(_KERNPG_TABLE | __pa(new_p4d_page)));
> }
> - BUILD_BUG_ON(pgd_large(*pgd) != 0);
> + BUILD_BUG_ON(pgd_leaf(*pgd) != 0);
>
> return p4d_offset(pgd, address);
> }
> --
> 2.44.0
>
>
--
Sincerely yours,
Mike.
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