Messages in this thread | | | Date | Tue, 24 Sep 2002 21:54:58 -0700 (PDT) | Subject | Re: cmpxchg in 2.5.38 | From | "David S. Miller" <> |
| |
From: Pete Zaitcev <zaitcev@redhat.com> Date: Wed, 25 Sep 2002 01:00:44 -0400
The cmpxchg() is used in kernel/pid.c:next_free_map():
if (cmpxchg(&map->page, NULL, (void *) page)) free_page(page); It is implemented on alpha, i386, ia64, ppc64, ppc, sparc64, x86_64, but not on mips, cris, arm, s390, s390x, sparc, sh, parisc. Do all architectures have to have it? Indeed, we can't really make cmpxchg a requirement, many cpus lack it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |