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    Subject[PATCH v9 10/12] x86/kasan: use kasan_map_populate()
    Date
    To optimize the performance of struct page initialization,
    vmemmap_populate() will no longer zero memory.

    Therefore, we must use a new interface to allocate and map kasan shadow
    memory, that also zeroes memory for us.

    Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
    ---
    arch/x86/mm/kasan_init_64.c | 8 ++++----
    1 file changed, 4 insertions(+), 4 deletions(-)

    diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
    index bc84b73684b7..2db95efd208e 100644
    --- a/arch/x86/mm/kasan_init_64.c
    +++ b/arch/x86/mm/kasan_init_64.c
    @@ -23,7 +23,7 @@ static int __init map_range(struct range *range)
    start = (unsigned long)kasan_mem_to_shadow(pfn_to_kaddr(range->start));
    end = (unsigned long)kasan_mem_to_shadow(pfn_to_kaddr(range->end));

    - return vmemmap_populate(start, end, NUMA_NO_NODE);
    + return kasan_map_populate(start, end, NUMA_NO_NODE);
    }

    static void __init clear_pgds(unsigned long start,
    @@ -136,9 +136,9 @@ void __init kasan_init(void)
    kasan_mem_to_shadow((void *)PAGE_OFFSET + MAXMEM),
    kasan_mem_to_shadow((void *)__START_KERNEL_map));

    - vmemmap_populate((unsigned long)kasan_mem_to_shadow(_stext),
    - (unsigned long)kasan_mem_to_shadow(_end),
    - NUMA_NO_NODE);
    + kasan_map_populate((unsigned long)kasan_mem_to_shadow(_stext),
    + (unsigned long)kasan_mem_to_shadow(_end),
    + NUMA_NO_NODE);

    kasan_populate_zero_shadow(kasan_mem_to_shadow((void *)MODULES_END),
    (void *)KASAN_SHADOW_END);
    --
    2.14.1
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