On Sunday, November 23, 2008 1:03 pm Arjan van de Ven wrote: > From 18cafd344e3de33b5e4feddac5657c1f5fed2d56 Mon Sep 17 00:00:00 2001 > From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> > Date: Wed, 22 Oct 2008 19:55:31 -0700 > Subject: [PATCH] resource: allow MMIO exclusivity for device drivers > > Device drivers that use pci_request_regions() (and similar APIs) have a > reasonable expectation that they are the only ones accessing their device. > As part of the e1000e hunt, we were afraid that some userland (X or some > bootsplash stuff) was mapping the MMIO region that the driver thought it > had exclusively via /dev/mem or via various sysfs resource mappings. > > This patch adds the option for device drivers to cause their reserved > regions to the "banned from /dev/mem use" list, so now both kernel memory > and device-exclusive MMIO regions are banned. > NOTE: This is only active when CONFIG_STRICT_DEVMEM is set. > > In addition to the config option, a kernel parameter iomem=relaxed is > provided for the cases where developers want to diagnose, in the field, > drivers issues from userspace. > > Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx> > Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> Applied to my linux-next branch, thanks Arjan & Matthew. Jesse -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
