drm/i915: Add compiler barrier to wait_for

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We need to be careful to not let compiler evaluate
the expiration and the operation on it's terms.

Document and enforce that COND will be evaluated
before checking timeout expiration.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423113754.28424-2-mika.kuoppala@linux.intel.com

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Mika Kuoppala 2018-04-23 14:37:54 +03:00

parent 3085982c6b

commit 1c3c1dc66a

1 changed files with 4 additions and 0 deletions

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drivers/gpu/drm/i915/intel_drv.h

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