[PATCH 5/5] drm/i915: kill fetch_and_zero

Andrzej Hajda
2022-12-09T15:51:10Z

Better use recently introduced kernel core helper.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_pages.c | 4 ++--
drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 6 +++---
drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c | 4 ++--
drivers/gpu/drm/i915/i915_hwmon.c | 2 +-
drivers/gpu/drm/i915/i915_perf.c | 2 +-
drivers/gpu/drm/i915/i915_query.c | 2 +-
drivers/gpu/drm/i915/i915_request.c | 4 ++--
drivers/gpu/drm/i915/i915_vma.c | 2 +-
drivers/gpu/drm/i915/intel_memory_region.c | 2 +-
drivers/gpu/drm/i915/intel_uncore.c | 4 ++--
drivers/gpu/drm/i915/intel_wakeref.c | 4 ++--
drivers/gpu/drm/i915/pxp/intel_pxp.c | 2 +-
drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 4 ++--
drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 2 +-
15 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index 05a27723ebb8cb..5498bd00ffd5e1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -209,7 +209,7 @@ __i915_gem_object_unset_pages(struct drm_i915_gem_object *obj)

assert_object_held_shared(obj);

- pages = fetch_and_zero(&obj->mm.pages);
+ pages = exchange(&obj->mm.pages, NULL);
if (IS_ERR_OR_NULL(pages))
return pages;

@@ -515,7 +515,7 @@ void __i915_gem_object_release_map(struct drm_i915_gem_object *obj)
* Furthermore, since this is an unsafe operation reserved only
* for construction time manipulation, we ignore locking prudence.
*/
- unmap_object(obj, page_mask_bits(fetch_and_zero(&obj->mm.mapping)));
+ unmap_object(obj, page_mask_bits(exchange(&obj->mm.mapping, 0)));

i915_gem_object_unpin_map(obj);
}
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index bc952107880734..6901b2529d1b29 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -652,7 +652,7 @@ static void
i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
{
struct drm_i915_private *i915 = to_i915(obj->base.dev);
- struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen);
+ struct drm_mm_node *stolen = exchange(&obj->stolen, NULL);

GEM_BUG_ON(!stolen);
i915_gem_stolen_remove_node(i915, stolen);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 5247d88b3c13e6..075112ebe30247 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -447,7 +447,7 @@ int i915_ttm_purge(struct drm_i915_gem_object *obj)
*/
shmem_truncate_range(file_inode(i915_tt->filp),
0, (loff_t)-1);
- fput(fetch_and_zero(&i915_tt->filp));
+ fput(exchange(&i915_tt->filp, 0));
}

obj->write_domain = 0;
@@ -779,7 +779,7 @@ static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
int ret;

/* First try only the requested placement. No eviction. */
- real_num_busy = fetch_and_zero(&placement->num_busy_placement);
+ real_num_busy = exchange(&placement->num_busy_placement, 0);
ret = ttm_bo_validate(bo, placement, &ctx);
if (ret) {
ret = i915_ttm_err_to_gem(ret);
@@ -905,7 +905,7 @@ static void i915_ttm_put_pages(struct drm_i915_gem_object *obj,
*/

if (obj->mm.rsgt)
- i915_refct_sgt_put(fetch_and_zero(&obj->mm.rsgt));
+ i915_refct_sgt_put(exchange(&obj->mm.rsgt, 0));
}

/**
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index ac02fb03659208..4d456f74d5d901 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -615,7 +615,7 @@ static void throttle_release(struct i915_request **q, int count)
if (IS_ERR_OR_NULL(q[i]))
continue;

- i915_request_put(fetch_and_zero(&q[i]));
+ i915_request_put(exchange(&q[i], 0));
}
}

@@ -1072,7 +1072,7 @@ __sseu_prepare(const char *name,
err_fini:
igt_spinner_fini(*spin);
err_free:
- kfree(fetch_and_zero(spin));
+ kfree(exchange(spin, 0));
return ret;
}

diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c
index cca7a4350ec8fd..c9d02f1124a067 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -732,5 +732,5 @@ void i915_hwmon_register(struct drm_i915_private *i915)

void i915_hwmon_unregister(struct drm_i915_private *i915)
{
- fetch_and_zero(&i915->hwmon);
+ exchange(&i915->hwmon, 0);
}
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index d22f30dd4fba27..d8b412e75b6079 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1535,7 +1535,7 @@ static void oa_put_render_ctx_id(struct i915_perf_stream *stream)
{
struct intel_context *ce;

- ce = fetch_and_zero(&stream->pinned_ctx);
+ ce = exchange(&stream->pinned_ctx, NULL);
if (ce) {
ce->tag = 0; /* recomputed on next submission after parking */
intel_context_unpin(ce);
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index 00871ef9979204..ace0f6f98a430b 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -404,7 +404,7 @@ static int query_perf_config_list(struct drm_i915_private *i915,
if (!ids)
return -ENOMEM;

- alloc = fetch_and_zero(&n_configs);
+ alloc = exchange(&n_configs, 0);

ids[n_configs++] = 1ull; /* reserved for test_config */
rcu_read_lock();
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index f949a9495758a0..9173b6c33d03c4 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -117,7 +117,7 @@ static void i915_fence_release(struct dma_fence *fence)
GEM_BUG_ON(rq->guc_prio != GUC_PRIO_INIT &&
rq->guc_prio != GUC_PRIO_FINI);

- i915_request_free_capture_list(fetch_and_zero(&rq->capture_list));
+ i915_request_free_capture_list(exchange(&rq->capture_list, 0));
if (rq->batch_res) {
i915_vma_resource_put(rq->batch_res);
rq->batch_res = NULL;
@@ -1948,7 +1948,7 @@ static void request_wait_wake(struct dma_fence *fence, struct dma_fence_cb *cb)
{
struct request_wait *wait = container_of(cb, typeof(*wait), cb);

- wake_up_process(fetch_and_zero(&wait->tsk));
+ wake_up_process(exchange(&wait->tsk, 0));
}

/**
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 34f0e6c923c26d..d3498314357073 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -635,7 +635,7 @@ void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags)
struct i915_vma *vma;
struct drm_i915_gem_object *obj;

- vma = fetch_and_zero(p_vma);
+ vma = exchange(p_vma, NULL);
if (!vma)
return;

diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c
index 9a4a7fb55582db..95d3ca1aa9a8f1 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/intel_memory_region.c
@@ -367,7 +367,7 @@ void intel_memory_regions_driver_release(struct drm_i915_private *i915)

for (i = 0; i < ARRAY_SIZE(i915->mm.regions); i++) {
struct intel_memory_region *region =
- fetch_and_zero(&i915->mm.regions[i]);
+ exchange(&i915->mm.regions[i], NULL);

if (region)
intel_memory_region_destroy(region);
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 614013745fcafe..c86abf1755039a 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -627,7 +627,7 @@ void intel_uncore_resume_early(struct intel_uncore *uncore)
if (!intel_uncore_has_forcewake(uncore))
return;

- restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
+ restore_forcewake = exchange(&uncore->fw_domains_saved, 0);
forcewake_early_sanitize(uncore, restore_forcewake);

iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
@@ -2249,7 +2249,7 @@ static void fw_domain_fini(struct intel_uncore *uncore,

GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);

- d = fetch_and_zero(&uncore->fw_domain[domain_id]);
+ d = exchange(&uncore->fw_domain[domain_id], NULL);
if (!d)
return;

diff --git a/drivers/gpu/drm/i915/intel_wakeref.c b/drivers/gpu/drm/i915/intel_wakeref.c
index dfd87d08221807..01ee7713e8171b 100644
--- a/drivers/gpu/drm/i915/intel_wakeref.c
+++ b/drivers/gpu/drm/i915/intel_wakeref.c
@@ -16,7 +16,7 @@ static void rpm_get(struct intel_wakeref *wf)

static void rpm_put(struct intel_wakeref *wf)
{
- intel_wakeref_t wakeref = fetch_and_zero(&wf->wakeref);
+ intel_wakeref_t wakeref = exchange(&wf->wakeref, 0);

intel_runtime_pm_put(wf->rpm, wakeref);
INTEL_WAKEREF_BUG_ON(!wakeref);
@@ -134,7 +134,7 @@ static void wakeref_auto_timeout(struct timer_list *t)
if (!refcount_dec_and_lock_irqsave(&wf->count, &wf->lock, &flags))
return;

- wakeref = fetch_and_zero(&wf->wakeref);
+ wakeref = exchange(&wf->wakeref, 0);
spin_unlock_irqrestore(&wf->lock, flags);

intel_runtime_pm_put(wf->rpm, wakeref);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 5efe61f6754601..d2c13bf7e9acf2 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -104,7 +104,7 @@ static int create_vcs_context(struct intel_pxp *pxp)
static void destroy_vcs_context(struct intel_pxp *pxp)
{
if (pxp->ce)
- intel_engine_destroy_pinned_context(fetch_and_zero(&pxp->ce));
+ intel_engine_destroy_pinned_context(exchange(&pxp->ce, 0));
}

static void pxp_init_full(struct intel_pxp *pxp)
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index 85572360c71a99..89e37ebb93b0ab 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -132,7 +132,7 @@ static void pxp_terminate(struct intel_pxp *pxp)
static void pxp_terminate_complete(struct intel_pxp *pxp)
{
/* Re-create the arb session after teardown handle complete */
- if (fetch_and_zero(&pxp->hw_state_invalidated))
+ if (exchange(&pxp->hw_state_invalidated, 0))
pxp_create_arb_session(pxp);

complete_all(&pxp->termination);
@@ -146,7 +146,7 @@ static void pxp_session_work(struct work_struct *work)
u32 events = 0;

spin_lock_irq(gt->irq_lock);
- events = fetch_and_zero(&pxp->session_events);
+ events = exchange(&pxp->session_events, 0);
spin_unlock_irq(gt->irq_lock);

if (!events)
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
index b0c9170b139542..345656515b8f0e 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -231,7 +231,7 @@ static int alloc_streaming_command(struct intel_pxp *pxp)

static void free_streaming_command(struct intel_pxp *pxp)
{
- struct drm_i915_gem_object *obj = fetch_and_zero(&pxp->stream_cmd.obj);
+ struct drm_i915_gem_object *obj = exchange(&pxp->stream_cmd.obj, NULL);

if (!obj)
return;
--
2.34.1