mtdblock cache flush at remount

[Todd Poynor]

David Woodhouse wrote:
> I don't care much, but if you see a way to make sync() have the desired
> effect I wouldn't be averse to it.

I took a look, and don't see a good way to fix this short of modifying 
generic code that requires a commit to media (like remount read-only and 
sync).  The modifications might call the block device layer to sync 
things from its standpoint, such as issuing a BLKFLSBUF ioctl.  If 
mtdblock is unique in that it does not necessarily write a block to 
stable storage when the block layer issues a write then this is not 
likely to gain much interest.  It's possible that the IDE drivers might 
want to flush disk hardware buffers in such a situation as well, much 
like what occurs at suspend and shutdown, but I haven't looked into that 
yet.  Thanks,

-- 
Todd Poynor
MontaVista Software