[PATCH 0/8] Backported fixes for 4.4 stable tree

[Ajay Kaher]

These patches include few backported fixes for the 4.4 stable
tree.
I would appreciate if you could kindly consider including them in the
next release.

Ajay

---
[PATCH 1/8]:
Backporting of upstream commit f958d7b528b1:
mm: make page ref count overflow check tighter and more explicit

[PATCH 2/8]:
Backporting of upstream commit 88b1a17dfc3e:
mm: add 'try_get_page()' helper function

[PATCH 3/8]:
Backporting of upstream commit 7aef4172c795:
mm: handle PTE-mapped tail pages in gerneric fast gup implementaiton

[PATCH 4/8]:
Backporting of upstream commit a3e328556d41:
mm, gup: remove broken VM_BUG_ON_PAGE compound check for hugepages

[PATCH 5/8]:
Backporting of upstream commit d63206ee32b6:
mm, gup: ensure real head page is ref-counted when using hugepages

[PATCH 6/8]:
Backporting of upstream commit 8fde12ca79af:
mm: prevent get_user_pages() from overflowing page refcount

[PATCH 7/8]:
Backporting of upstream commit 7bf2d1df8082:
pipe: add pipe_buf_get() helper

[PATCH 8/8]:
Backporting of upstream commit 15fab63e1e57:
fs: prevent page refcount overflow in pipe_buf_get