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Subject: Re: [PATCH v2] arm64: Add __init section marker to some functions
To:     Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <20210330135449.4dcffd7f@xhacker.debian>
From:   Steven Price <steven.price@arm.com>
Message-ID: <ee23634b-c70a-6125-c8dc-3692f100672a@arm.com>
Date:   Wed, 7 Apr 2021 14:48:00 +0100
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On 30/03/2021 06:54, Jisheng Zhang wrote:
> They are not needed after booting, so mark them as __init to move them
> to the .init section.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>

Reviewed-by: Steven Price <steven.price@arm.com>

> ---
> Since v1:
>   - add __init section mark to __vdso_init() and __aarch32_alloc_vdso_pages()
> 
>   arch/arm64/include/asm/ptdump.h | 2 +-
>   arch/arm64/kernel/vdso.c        | 4 ++--
>   arch/arm64/mm/ptdump.c          | 4 ++--
>   arch/arm64/mm/ptdump_debugfs.c  | 2 +-
>   4 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/ptdump.h b/arch/arm64/include/asm/ptdump.h
> index 38187f74e089..b1dd7ecff7ef 100644
> --- a/arch/arm64/include/asm/ptdump.h
> +++ b/arch/arm64/include/asm/ptdump.h
> @@ -23,7 +23,7 @@ struct ptdump_info {
>   
>   void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
>   #ifdef CONFIG_PTDUMP_DEBUGFS
> -void ptdump_debugfs_register(struct ptdump_info *info, const char *name);
> +void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
>   #else
>   static inline void ptdump_debugfs_register(struct ptdump_info *info,
>   					   const char *name) { }
> diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
> index cee5d04ea9ad..d1fa288518a7 100644
> --- a/arch/arm64/kernel/vdso.c
> +++ b/arch/arm64/kernel/vdso.c
> @@ -86,7 +86,7 @@ static int vdso_mremap(const struct vm_special_mapping *sm,
>   	return 0;
>   }
>   
> -static int __vdso_init(enum vdso_abi abi)
> +static int __init __vdso_init(enum vdso_abi abi)
>   {
>   	int i;
>   	struct page **vdso_pagelist;
> @@ -326,7 +326,7 @@ static int aarch32_alloc_sigpage(void)
>   	return 0;
>   }
>   
> -static int __aarch32_alloc_vdso_pages(void)
> +static int __init __aarch32_alloc_vdso_pages(void)
>   {
>   
>   	if (!IS_ENABLED(CONFIG_COMPAT_VDSO))
> diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
> index 0e050d76b83a..a50e92ea1878 100644
> --- a/arch/arm64/mm/ptdump.c
> +++ b/arch/arm64/mm/ptdump.c
> @@ -337,7 +337,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
>   	ptdump_walk_pgd(&st.ptdump, info->mm, NULL);
>   }
>   
> -static void ptdump_initialize(void)
> +static void __init ptdump_initialize(void)
>   {
>   	unsigned i, j;
>   
> @@ -381,7 +381,7 @@ void ptdump_check_wx(void)
>   		pr_info("Checked W+X mappings: passed, no W+X pages found\n");
>   }
>   
> -static int ptdump_init(void)
> +static int __init ptdump_init(void)
>   {
>   	address_markers[PAGE_END_NR].start_address = PAGE_END;
>   #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
> diff --git a/arch/arm64/mm/ptdump_debugfs.c b/arch/arm64/mm/ptdump_debugfs.c
> index d29d722ec3ec..68bf1a125502 100644
> --- a/arch/arm64/mm/ptdump_debugfs.c
> +++ b/arch/arm64/mm/ptdump_debugfs.c
> @@ -16,7 +16,7 @@ static int ptdump_show(struct seq_file *m, void *v)
>   }
>   DEFINE_SHOW_ATTRIBUTE(ptdump);
>   
> -void ptdump_debugfs_register(struct ptdump_info *info, const char *name)
> +void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name)
>   {
>   	debugfs_create_file(name, 0400, NULL, info, &ptdump_fops);
>   }
>