Asynchronous Fsync: initial extraction of Async Fsync from HTC

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	fs/Kconfig
	fs/namespace.c
	fs/sync.c
Revert "Asynchronous Fsync: initial extraction of Async Fsync from HTC"

This reverts commit 474a41618567301e35c8041ba92e5f6da2da48d0.
Asynchronous Fsync: initial extraction of Async Fsync from HTC

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	fs/Kconfig
	fs/namespace.c
	fs/sync.c