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    Subject[ 29/48] sparc64: Fix ITLB handler of null page
    Date
    3.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Kirill Tkhai <tkhai@yandex.ru>

    [ Upstream commit 1c2696cdaad84580545a2e9c0879ff597880b1a9 ]

    1)Use kvmap_itlb_longpath instead of kvmap_dtlb_longpath.

    2)Handle page #0 only, don't handle page #1: bleu -> blu

    (KERNBASE is 0x400000, so #1 does not exist too. But everything
    is possible in the future. Fix to not to have problems later.)

    3)Remove unused kvmap_itlb_nonlinear.

    Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
    CC: David Miller <davem@davemloft.net>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    arch/sparc/kernel/ktlb.S | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    --- a/arch/sparc/kernel/ktlb.S
    +++ b/arch/sparc/kernel/ktlb.S
    @@ -25,11 +25,10 @@ kvmap_itlb:
    */
    kvmap_itlb_4v:

    -kvmap_itlb_nonlinear:
    /* Catch kernel NULL pointer calls. */
    sethi %hi(PAGE_SIZE), %g5
    cmp %g4, %g5
    - bleu,pn %xcc, kvmap_dtlb_longpath
    + blu,pn %xcc, kvmap_itlb_longpath
    nop

    KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_itlb_load)



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