Revert "android/lowmemorykiller: Only consider gfp_mask free pages"

This reverts commit f7140419492e97f4008af6b8a9f8503916f78563.

Iterating the page free_list without locking it can crash
because the list can change while being iterated.

Iterating the page free_list while locking it can cause a
deadlock.

CRs-fixed: 427061
Change-Id: I9e89b121e7436c8dcac922ad973d8c06a31ce9b0
Signed-off-by: Liam Mark <lmark@codeaurora.org>
3 files changed