On 08/03/2019 08:37, Mike Rapoport wrote:

On Wed, Mar 06, 2019 at 03:50:16PM +0000, Steven Price wrote:

quoted

walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information is provided by the
p?d_large() functions/macros.

For powerpc pmd_large() was already implemented, so hoist it out of the
CONFIG_TRANSPARENT_HUGEPAGE condition and implement the other levels.

Also since we now have a pmd_large always implemented we can drop the
pmd_is_leaf() function.

CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: linuxppc-dev@lists.ozlabs.org
CC: kvm-ppc@vger.kernel.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/powerpc/include/asm/book3s/64/pgtable.h | 30 ++++++++++++++------

There is one more definition of pmd_large() in
arch/powerpc/include/asm/pgtable.h

True. That is a #define so will work correctly (it will override the
generic version). Since it is only a dummy definition (always returns 0)
it could be removed, but that would need to be in a separate patch after
the asm-generic versions have been added to avoid breaking bisection.

Steve

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