linux-kernel - Re: lib: Export generic atomic64

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Message-ID: <19029.17220.326485.724846@cargo.ozlabs.ibm.com>
Date:	Thu, 9 Jul 2009 11:09:24 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Roland Dreier <rdreier@...co.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: lib: Export generic atomic64_t functions

Roland Dreier writes:

> The generic atomic64_t implementation in lib/ did not export the
> functions it defined, which means that modules that use atomic64_t
> would not link on platforms (such as 32-bit powerpc).  For example,
> trying to build a kernel with CONFIG_NET_RDS on such a platform would
> fail with:
> 
>     ERROR: "atomic64_read" [net/rds/rds.ko] undefined!
>     ERROR: "atomic64_set" [net/rds/rds.ko] undefined!
> 
> Fix this by exporting the atomic64_t functions to modules.  (I export
> the entire API even if it's not all currently used by in-tree modules to
> avoid having to continue fixing this in dribs and drabs)
> 
> Signed-off-by: Roland Dreier <rolandd@...co.com>

Nice, thanks.

Acked-by: Paul Mackerras <paulus@...ba.org>

Andrew, I think this should be safe to go in 2.6.31.  Could you
include it in your next batch for Linus, or should I send it to him
directly?

Paul.
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