Date: Mon, 17 May 2004 13:58:24 -0700 (PDT) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 52947 for review Message-ID: <200405172058.i4HKwOR5066898@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=52947 Change 52947 by peter@peter_hammer on 2004/05/17 13:58:08 Fix refcount "bug". If you have two loaders in a kernel, one has a kobj class refcount for the "kernel", the other has 0 refs. When you load/unload on the "other" loader, the refcount goes 0->1->0. And then kobj helpfully frees the compiled method table. Cheat, and fight fire with fire. Since we can't ever unload classes, add a manual refcount boost to prevent this happening. Affected files ... .. //depot/projects/hammer/sys/kern/kern_linker.c#14 edit Differences ... ==== //depot/projects/hammer/sys/kern/kern_linker.c#14 (text+ko) ==== @@ -148,6 +148,7 @@ if (linker_no_more_classes == 1) return (EPERM); kobj_class_compile((kobj_class_t) lc); + ((kobj_class_t)lc)->refs++; /* prevent ops being freed */ TAILQ_INSERT_TAIL(&classes, lc, link); return (0); }
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