ion: use alloc_pages in system contig heap
authorColin Cross <ccross@android.com>
Sat, 14 Dec 2013 03:26:27 +0000 (19:26 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 14 Dec 2013 16:59:53 +0000 (08:59 -0800)
commit5c6a470557e51bb4e868c22450811726c32f5787
treea937d115250fe5c92d7521c49d0ef32824283439
parenta053b6ace160a7751fc53326bb354266e3e914f0
ion: use alloc_pages in system contig heap

There is no reason to use kzalloc, just call alloc_pages directly.
Change the GFP from GFP_KERNEL to include __GFP_HIGH, to allow it
to return contiguous pages from highmem.  virt_to_* functions
aren't valid on highmem pages, so store the struct page * in an
sg_table in buffer->priv_virt like most other heaps, and replace
virt_to_* with page_to_*.

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/android/ion/ion_system_heap.c