mm/arm: redefine pmd_huge() with pmd_leaf()

Most of the archs already define these two APIs the same way.  ARM is more
complicated in two aspects:

  - For pXd_huge() it's always checking against !PXD_TABLE_BIT, while for
    pXd_leaf() it's always checking against PXD_TYPE_SECT.

  - SECT/TABLE bits are defined differently on 2-level v.s. 3-level ARM
    pgtables, which makes the whole thing even harder to follow.

Luckily, the second complexity should be hidden by the pmd_leaf()
implementation against 2-level v.s. 3-level headers.  Invoke pmd_leaf()
directly for pmd_huge(), to remove the first part of complexity.  This
prepares to drop pXd_huge() API globally.

When at it, drop the obsolete comments - it's outdated.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Peter Xu <[email protected]>
Cc: Russell King <[email protected]>
Cc: Shawn Guo <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Bjorn Andersson <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Konrad Dybcio <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Andreas Larsson <[email protected]>
Cc: "Aneesh Kumar K.V" <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Lucas Stach <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: "Matthew Wilcox (Oracle)" <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Mike Rapoport (IBM) <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: "Naveen N. Rao" <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions