tree 38acf3e2cdee0ae2a01d1274e70a2fca45e65602
parent b44d9ce3b81715311198f0c5fa329e518b4f9f18
author Gioh Kim <gioh.kim@lge.com> 1436163281 +0900
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1436939250 -0700

staging: ion: debugfs to shrink pool

This patch enables debugfs file /sys/kernel/debug/ion/heaps/system_shrink
to shrink pool and get pool size. This technically enables debugfs
shrinking for all heaps, not just the system heap although the system heap
is the only one with a shrinker right now. It is already implemented
but not complete. This patch completes and enables it.

Reading the file returns pool size
in page unit and writing the number of pages shrinks pool.
It flushes all pages to write zero at the file.

Signed-off-by: Gioh Kim <gioh.kim@lge.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>