diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-12-11 14:03:10 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-12-23 13:07:41 +0300 |
| commit | 5e9635085737a7d7d035c9199dce74c1b2726b61 (patch) | |
| tree | 55c91e19ac134c81ba07cdeea166b1b37e7ee638 /drivers/gpu/drm/i915/i915_active.c | |
| parent | d484bd0ddf0b3e13e60dace6d02d705384d4411b (diff) | |
| download | linux-5e9635085737a7d7d035c9199dce74c1b2726b61.tar.xz | |
drm/i915: Use cmpxchg64 for 32b compatilibity
By using the double wide cmpxchg64 on 32bit, we can use the same
algorithm on both 32/64b systems.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201211110310.22740-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_active.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_active.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index 10a865f3dc09..ab4382841c6b 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -159,8 +159,7 @@ __active_retire(struct i915_active *ref) GEM_BUG_ON(ref->tree.rb_node != &ref->cache->node); /* Make the cached node available for reuse with any timeline */ - if (IS_ENABLED(CONFIG_64BIT)) - ref->cache->timeline = 0; /* needs cmpxchg(u64) */ + ref->cache->timeline = 0; /* needs cmpxchg(u64) */ } spin_unlock_irqrestore(&ref->tree_lock, flags); @@ -256,7 +255,6 @@ static struct active_node *__active_lookup(struct i915_active *ref, u64 idx) if (cached == idx) return it; -#ifdef CONFIG_64BIT /* for cmpxchg(u64) */ /* * An unclaimed cache [.timeline=0] can only be claimed once. * @@ -267,9 +265,8 @@ static struct active_node *__active_lookup(struct i915_active *ref, u64 idx) * only the winner of that race will cmpxchg return the old * value of 0). */ - if (!cached && !cmpxchg(&it->timeline, 0, idx)) + if (!cached && !cmpxchg64(&it->timeline, 0, idx)) return it; -#endif } BUILD_BUG_ON(offsetof(typeof(*it), node)); |