On Wed, 03 Sep 2014 22:37:26 +0530, Joshi said: > I do this only when I know that I am working on a partition which has > filesystem
The problem is that the block layer has no way of knowing that. What problem are you trying to solve here, and why are you trying to do it from the block layer? The *proper* design here would probably involve doing VFS hooking of some sort to *tell* the block layer what to do (for instance, if you're trying to do some sort of "secure erase", you would have the VFS schedule a bunch of I/Os to the block layer).
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