[PATCH V2 0/11] sparc64 MM fixes

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This is the final series I am submitting to Linus and intend to
submit to -stable, thanks for all of the feedback and reviews.  I
was a bit delayed because I kept triggering crashes caused by a
bug recently introduced in SLAB in 3.15-rc1 which just got fixed
fully tonight.

At a high level:

1) Calculate the executable bit in PMD vs. PTE properly in the PMD
   setting TLB flush code.

2) Use PAGE_VALID bit to encode valid vs. invalid transparent huge
   PMDs, check this bit in the TLB miss handler.

3) get_user_pages_fast() doesn't traverse THP mappins properly,
   neither does get_user_insn().

4) Trim high bits of addresses computed by compute_effective_address()
   when process is 32-bit.

5) Make pmd_bad() and pud_bad() actually do something.

Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
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