[git pull] Please pull powerpc.git merge branch

Hi Linus !

So you make the call onto whether taking that one now or waiting for the
merge window. It's a bug fix for a crash in mremap that occurs on
powerpc with THP enabled.

The fix however requires a small change in the generic code. It moves a
condition into a helper we can override from the arch which is harmless,
but it *also* slightly changes the order of the set_pmd and the withdraw
& deposit, which should be fine according to Kirill (who wrote that
code) but I agree -rc8 is a bit late...

It was acked by Kirill and Andrew told me to just merge it via powerpc.

My original intend was to put it in powerpc-next and then shoot it to
stable, but it got a tad annoying (due to churn it needs to be applied
at least on rc4 or later while my next is at rc1 and clean that way), so
I put it in the merge branch.

From there, you tell me if you want to take it now, if not, I'll send

you that branch along with my normal next one after you open the merge
window.

Cheers,
Ben.

The following changes since commit a6da83f98267bc8ee4e34aa899169991eb0ceb93:

  Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc (2014-01-13 10:59:05 +0700)

are available in the git repository at:


  git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git merge

for you to fetch changes up to b3084f4db3aeb991c507ca774337c7e7893ed04f:

  powerpc/thp: Fix crash on mremap (2014-01-15 15:46:38 +1100)

----------------------------------------------------------------
Aneesh Kumar K.V (1):
      powerpc/thp: Fix crash on mremap

 arch/powerpc/include/asm/pgtable-ppc64.h | 14 ++++++++++++++
 include/asm-generic/pgtable.h            | 12 ++++++++++++
 mm/huge_memory.c                         | 14 +++++---------
 3 files changed, 31 insertions(+), 9 deletions(-)

On Wed, Jan 15, 2014 at 12:01 PM, Benjamin Herrenschmidt
[off-list ref] wrote:

My original intend was to put it in powerpc-next and then shoot it to
stable, but it got a tad annoying (due to churn it needs to be applied
at least on rc4 or later while my next is at rc1 and clean that way), so
I put it in the merge branch.

Quite frankly, I'll prefer to not merge it now, and then 3.13 will get
it from stable, when it does things like this.

Partly because it fixes a power-only bug, but potentially changes
non-power behavior. If it was all in arch/powerpc, I wouldn't mind.

               Linus

On Wed, 2014-01-15 at 15:05 +0700, Linus Torvalds wrote:

On Wed, Jan 15, 2014 at 12:01 PM, Benjamin Herrenschmidt
[off-list ref] wrote:

quoted

My original intend was to put it in powerpc-next and then shoot it to
stable, but it got a tad annoying (due to churn it needs to be applied
at least on rc4 or later while my next is at rc1 and clean that way), so
I put it in the merge branch.

Quite frankly, I'll prefer to not merge it now, and then 3.13 will get
it from stable, when it does things like this.

Partly because it fixes a power-only bug, but potentially changes
non-power behavior. If it was all in arch/powerpc, I wouldn't mind.

Right, I wasn't too comfortable either. I'll resend the pull request
after the merge window is open.

Cheers,
Ben.

               Linus
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