Donald Haase

pvr: Fix pvr_get_{front,back}_buffer()

mmu: Add function mmu_page_unmap()

mmu: Drop old virtual mapping from iTLB before mapping new one

mmu: Fix cacheability setting

mmu: Actually handle "dirty" parameter to mmu_page_map()

workqueue: Wake blocked cancellers under the lock

workqueue: Only unlink a cancelled job when it is queued

browse: Correct string.h include.