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From: John Kacur on 17 Mar 2010 10:10
This is a compile failure on 2.6.33.1-rt9 on x86

ERROR: "iounmap_atomic" [drivers/gpu/drm/i915/i915.ko] undefined!
ERROR: "iomap_atomic_prot_pfn" [drivers/gpu/drm/i915/i915.ko] undefined!

Analysis:

i915_drv.c and i915_gem.c include i915_drv.h which includes io_mapping.h
file: io_mapping.h
has function io_mapping_map_atomic_wc which calls iomap_atomic_prot_pfn
has function io_mapping_unmap_atomic which calls iounmap_atomic

These functions are defined in iomap_32.c but not ifdef PREEMPT_RT
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Prev: [PATCH 17/17] Staging: comedi: fix indent coding style issue in adl_pci9118.c
Next: tmpfs: mpol=bind:0 don't cause mount error.