[PATCH 2/4] fsfreeze: manage kill signal when sb_start_write is called

[Al Viro]

On Sat, Apr 06, 2013 at 12:04:52PM +0200, Marco Stornelli wrote:
> In every place where sb_start_write was called now we must manage
> the error code and return -EINTR.

Now go and look for callers of mnt_want_write() ;-/  The really
painful one is in do_last(), but kern_path_create() is not much
better; mq_open() would be bad too, had it not been about something
you are not going to freeze anyway...