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| author | Dave Gordon <david.s.gordon@intel.com> | 2015-12-08 15:02:36 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-12-10 14:14:36 +0100 |
| commit | b0366a54b446c53791000758d55abf80b1e0e961 (patch) | |
| tree | d0e11b539b37b962310ecc3b3c1ccc04576fffe0 /drivers/gpu/drm/i915/intel_ringbuffer.h | |
| parent | 54a4196188eab82e6f0a5f05716626e9f18b8fb6 (diff) | |
| download | lwn-b0366a54b446c53791000758d55abf80b1e0e961.tar.gz lwn-b0366a54b446c53791000758d55abf80b1e0e961.zip | |
drm/i915: intel_ring_initialized() must be simple and inline
Based on Chris Wilson's patch from 6 months ago, rebased and adapted.
The current implementation of intel_ring_initialized() is too heavyweight;
it's a non-inlined function that chases several levels of pointers. This
wouldn't matter too much if it were rarely called, but it's used inside
the iterator test of for_each_ring() and is therefore called quite
frequently. So let's make it simple and inline ...
The idea here is to use ring->dev as an indicator showing which engines
have been initialised and are therefore to be included in iterations that
use for_each_ring(). This allows us to avoid multiple memory references
and a (non-inlined) function call on each iteration of each such loop.
Fixes regression from
commit 48d823878d64f93163f5a949623346748bbce1b4
Author: Oscar Mateo <oscar.mateo@intel.com>
Date: Thu Jul 24 17:04:23 2014 +0100
drm/i915/bdw: Generic logical ring init and cleanup
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1449586956-32360-2-git-send-email-david.s.gordon@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 5d1eb206151d..49574ffe54bc 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -350,7 +350,11 @@ struct intel_engine_cs { u32 (*get_cmd_length_mask)(u32 cmd_header); }; -bool intel_ring_initialized(struct intel_engine_cs *ring); +static inline bool +intel_ring_initialized(struct intel_engine_cs *ring) +{ + return ring->dev != NULL; +} static inline unsigned intel_ring_flag(struct intel_engine_cs *ring) |