Issue #2576 has been reported by davshao.
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Bug #2576: sys/vm/device_pager.c old_dev_pager_fault() dev_dmmap needs offset
<< PAGE_SHIFT
http://bugs.dragonflybsd.org/issues/2576
Author: davshao
Status: New
Priority: Normal
Assignee:
Category:
Target version:
commit f2c2051ee473577d22178d55f782ceebbd88d58f
Date: Mon Jul 29 22:39:56 2013 +0200
kernel: Port new device_pager interface from FreeBSD
should probably be amended in sys/vm/device_pager.c, function
old_dev_pager_fault() to use
paddr = pmap_phys_address(
dev_dmmap(dev, offset << PAGE_SHIFT, prot));
similar to what had been used in the previous version of dev_pager_getpage().
Without this change, legacy drm systems running say a Radeon 4xxx graphics card
failed to have dports Xorg start.
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