From: John Kacur <jkacur@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>,
RT <linux-rt-users@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>, tremyfr@yahoo.fr
Subject: [BUG-REPORT] [PREEMPT_RT] Build break with DRM_I915 and HAVE_ATOMIC_IOMAP
Date: Wed, 17 Mar 2010 15:08:02 +0100 [thread overview]
Message-ID: <520f0cf11003170708w758d3008n515a2f8d7d8751d6@mail.gmail.com> (raw)
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
reply other threads:[~2010-03-17 14:08 UTC|newest]
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