Re: [PATCH] writeback: initialize m_dirty to avoid compile warning

From: Tejun Heo
Date: Wed Nov 18 2015 - 13:33:52 EST


On Wed, Nov 18, 2015 at 10:27:32AM -0800, Shi, Yang wrote:
> >This was the main reason the code was structured the way it is. If
> >cgroup writeback is not enabled, any derefs of mdtc variables should
> >trigger warnings. Ugh... I don't know. Compiler really should be
> >able to tell this much.
> Thanks for the explanation. It sounds like a compiler problem.
> If you think it is still good to cease the compile warning, maybe we could

If this is gonna be a problem with new gcc versions, I don't think we
have any other options. :(

> just assign it to an insane value as what Andrew suggested, maybe
> 0xdeadbeef.

I'd just keep it at zero. Whatever we do, the effect is gonna be
difficult to track down - it's not gonna blow up in an obvious way.
Can you please add a comment tho explaining that this is to work
around compiler deficiency?


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