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    SubjectRe: [PATCH 04/24] x86/mm/kaiser: Unmap kernel mappings from userspace page tables, core patch
    On Mon, Nov 27, 2017 at 11:49:03AM +0100, Ingo Molnar wrote:
    > +/*
    > + * Given a kernel address, @__start_addr, copy that mapping into
    > + * the user (shadow) page tables. This may need to allocate page
    > + * table pages.
    > + */
    > +int kaiser_add_user_map(const void *__start_addr, unsigned long size,
    > + unsigned long flags)
    > +{
    > +}
    > +
    > +int kaiser_add_user_map_ptrs(const void *__start_addr,
    > + const void *__end_addr,
    > + unsigned long flags)
    > +{
    > +}

    AFAICT these here can be static..


    diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c
    index 0ff502fa655b..f2bf074b08e5 100644
    --- a/arch/x86/mm/kaiser.c
    +++ b/arch/x86/mm/kaiser.c
    @@ -260,8 +260,8 @@ static pte_t *kaiser_shadow_pagetable_walk(unsigned long address,
    * the user (shadow) page tables. This may need to allocate page
    * table pages.
    */
    -int kaiser_add_user_map(const void *__start_addr, unsigned long size,
    - unsigned long flags)
    +static int kaiser_add_user_map(const void *__start_addr, unsigned long size,
    + unsigned long flags)
    {
    unsigned long start_addr = (unsigned long)__start_addr;
    unsigned long address = start_addr & PAGE_MASK;
    @@ -310,9 +310,9 @@ int kaiser_add_user_map(const void *__start_addr, unsigned long size,
    return 0;
    }

    -int kaiser_add_user_map_ptrs(const void *__start_addr,
    - const void *__end_addr,
    - unsigned long flags)
    +static int kaiser_add_user_map_ptrs(const void *__start_addr,
    + const void *__end_addr,
    + unsigned long flags)
    {
    return kaiser_add_user_map(__start_addr,
    __end_addr - __start_addr,
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