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@gmail.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