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    Subject[PATCH 5.13 601/800] MIPS: Fix PKMAP with 32-bit MIPS huge page support
    Date
    From: Wei Li <liwei391@huawei.com>

    [ Upstream commit cf02ce742f09188272bcc8b0e62d789eb671fc4c ]

    When 32-bit MIPS huge page support is enabled, we halve the number of
    pointers a PTE page holds, making its last half go to waste.
    Correspondingly, we should halve the number of kmap entries, as we just
    initialized only a single pte table for that in pagetable_init().

    Fixes: 35476311e529 ("MIPS: Add partial 32-bit huge page support")
    Signed-off-by: Wei Li <liwei391@huawei.com>
    Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/mips/include/asm/highmem.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/mips/include/asm/highmem.h b/arch/mips/include/asm/highmem.h
    index 292d0425717f..92a380210017 100644
    --- a/arch/mips/include/asm/highmem.h
    +++ b/arch/mips/include/asm/highmem.h
    @@ -36,7 +36,7 @@ extern pte_t *pkmap_page_table;
    * easily, subsequent pte tables have to be allocated in one physical
    * chunk of RAM.
    */
    -#ifdef CONFIG_PHYS_ADDR_T_64BIT
    +#if defined(CONFIG_PHYS_ADDR_T_64BIT) || defined(CONFIG_MIPS_HUGE_TLB_SUPPORT)
    #define LAST_PKMAP 512
    #else
    #define LAST_PKMAP 1024
    --
    2.30.2


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