linux-kernel - Re: [PATCH v5 6/8] mm: Move vmap_range from lib/ioremap.c to mm/vmalloc.c

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Date:   Fri, 21 Aug 2020 07:48:53 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Nicholas Piggin <npiggin@...il.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zefan Li <lizefan@...wei.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v5 6/8] mm: Move vmap_range from lib/ioremap.c to
 mm/vmalloc.c



Le 21/08/2020 à 06:44, Nicholas Piggin a écrit :
> This is a generic kernel virtual memory mapper, not specific to ioremap.
> 
> Signed-off-by: Nicholas Piggin <npiggin@...il.com>
> ---
>   include/linux/vmalloc.h |   2 +
>   mm/ioremap.c            | 192 ----------------------------------------
>   mm/vmalloc.c            | 191 +++++++++++++++++++++++++++++++++++++++
>   3 files changed, 193 insertions(+), 192 deletions(-)
> 
> diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
> index 787d77ad7536..e3590e93bfff 100644
> --- a/include/linux/vmalloc.h
> +++ b/include/linux/vmalloc.h
> @@ -181,6 +181,8 @@ extern struct vm_struct *remove_vm_area(const void *addr);
>   extern struct vm_struct *find_vm_area(const void *addr);
>   
>   #ifdef CONFIG_MMU
> +extern int vmap_range(unsigned long addr, unsigned long end, phys_addr_t phys_addr, pgprot_t prot,
> +			unsigned int max_page_shift);

extern keyword is useless on function prototypes and deprecated. Please 
don't add new function prototypes with that keyword.

>   extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
>   				    pgprot_t prot, struct page **pages);
>   int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,

Christophe