Date: Sun, 23 May 2010 12:36:15 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Bruce Evans <brde@optusnet.com.au> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r208332 - in head/sys: amd64/include i386/include Message-ID: <11069.1274618175@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 23 May 2010 19:01:41 %2B1000." <20100523183502.C13588@delplex.bde.org>
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In message <20100523183502.C13588@delplex.bde.org>, Bruce Evans writes: >On Thu, 20 May 2010, Poul-Henning Kamp wrote: ><machine/atomic.h> should be kernel-only. No, it absolutely should not, if anything, it should be pushed as international standards (with <sys/endian.h>, and <sys/queue.h>). Atomic operations and write barriers are necessary when multiple threads or processes cooperate using shared memory. and if anything the bug is that POSIX has not updated pthreads to have these and other necessary primitives. (pthread_mutex_assert_held() for instance). I agree that FlexeLint is a bit hysterical at times, but when the issue can be avioded at a "cost" of increased clarity of intention, I don't see any reason to not do so. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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