From: Daeho Jeong <daehojeong@xxxxxxxxxx>
Now decompression is being handled in workqueue and it makes read I/O
latency non-deterministic, because of the non-deterministic scheduling
nature of workqueues. So, I made it handled in softirq context only if
possible, not in low memory devices, since this modification will
maintain decompresion related memory a little longer.
---
v1: fixed build errors reported by kernel test robot <lkp@xxxxxxxxx>
v2: enhanced readability and removed a redundant code
Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>