Messages in this thread | | | Date | Thu, 1 Jun 2006 22:11:41 -0700 | From | Andrew Morton <> | Subject | Re: pci_walk_bus race condition |
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On Fri, 02 Jun 2006 12:35:43 +0800 "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> wrote:
> pci_walk_bus has a race with pci_destroy_dev. When cb is called > in pci_walk_bus, pci_destroy_dev might unlink the dev pointed by next. > Later on in the next loop, pointer next becomes NULL and cause > kernel panic. > > Below patch against 2.6.17-rc4 fixes it by changing pci_bus_lock (spin_lock) > to pci_bus_sem (rw_semaphore).
How does s/spinlock/rwsem/ fix a race?? - 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/
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