Re: ipc/msg.c "cleanup" breaks fakeroot on Alpha

From: Ingo Molnar
Date: Sat Nov 04 2006 - 12:31:08 EST



* Falk Hueffner <falk@xxxxxxxxxx> wrote:

> - struct msg_msg* volatile r_msg;
> + volatile struct msg_msg *r_msg;
> };
>
> breaks fakeroot on Alpha (variously hangs or oopses). Backing it out
> of 2.6.19-rc4 fixes the issue. Is it possible that this change (which
> clearly does change semantics) was made in error?

correct, it was an error, lets back it out.

Another interesting question is: what in the IPC code relies on the
volatility of this field, and shouldnt it be converted to explicit
barriers instead?

Ingo
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