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[73.37.105.206]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3990d4a1732sm630545a91.7.2026.08.31.10.44.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Aug 2026 10:44:26 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: Rob Clark , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , Boris Brezillon , Steven Price , Liviu Dudau , linux-kernel@vger.kernel.org (open list), linux-arm-msm@vger.kernel.org (open list:DRM DRIVER for Qualcomm display hardware), freedreno@lists.freedesktop.org (open list:DRM DRIVER for Qualcomm display hardware) Subject: [PATCH] drm/gem: Drop ticket arg to lru_scan() Date: Mon, 31 Aug 2026 10:44:08 -0700 Message-ID: <20260831174409.465181-1-robin.clark@oss.qualcomm.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODMxMDE1MyBTYWx0ZWRfXzf2xAEWMHqH2 roNh+0835sXm7SdkluI0HrlZBl86fLALAQ6wvzB/CO1wUaPJE8FIp5hs1PXMV1UZ52P7TSWknsg PWf8JpzJVqGhTAljgFGdzztNYAdBy0I= X-Authority-Analysis: v=2.4 cv=CpaPtH4D c=1 sm=1 tr=0 ts=6a95bd7c cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=19Wyn7e3V/0aNffMjNCMQw==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=tUov0DBtqpY1NIlP9OAA:9 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODMxMDE1MyBTYWx0ZWRfX5oo9Caip7ApF NySSLW58Cfrl0zuljhS66owKLT9ftVf9Z4s8EBHRW72/p3CyyAfq/MAMGjcTCl0cDEjEz6vsTtm WmgudWgJmiQE3WK/fCP1CXe6QW6mQEVZJiaORsJQKcXr5v83rrl+SrLBWM6R5AjiosRDyoNUBDQ pJZ2ircKx3Gpg8ccL0V/wiWeYZFVnjyhVS3JvTlBZ42rKFjrP5hJ3tPM4D8Vpse3o6XXPt89NZa Fjw98sn14NCSWqe37FvsRnNciM2GXSbRuwZ0H7CJ8PULzHYArBNWt6S0f4iEf0hx+K8vHA1XD2q +bjUCVRv1817g5LWchtwj/31+YzQxF55hdLkGoJAylPnmuZKke2n59VQ+I+qAdTXg3RJKQSbu/E DpsQhw+56iZhC0gEkwojIwVi/6yKwsAqb/eIcflUr79Kswlq/IlFKtl0NEfTi7I4DSV5yDWDYEX 7l/aTBKzJQxUXi8/3PQ== X-Proofpoint-ORIG-GUID: pS0sFiWCFlu_2V7VF2Tp--KzTdgkpYme X-Proofpoint-GUID: pS0sFiWCFlu_2V7VF2Tp--KzTdgkpYme X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-31_05,2026-08-31_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 phishscore=0 suspectscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608310153 Commit 3392291fc509 ("drm/msm: Fix shrinker deadlock") dropped the only use of the ticket arg, but at the time left drm_gem_lru_scan() unchanged to avoid conflicts with in-flight pathor shrinker support. This commit is the followup to remove the unused arg. Signed-off-by: Rob Clark --- drivers/gpu/drm/drm_gem.c | 13 +++---------- drivers/gpu/drm/msm/msm_gem_shrinker.c | 22 ++++++++++------------ drivers/gpu/drm/panthor/panthor_gem.c | 14 ++++++-------- drivers/gpu/drm/panthor/panthor_mmu.c | 5 ++--- drivers/gpu/drm/panthor/panthor_mmu.h | 3 +-- include/drm/drm_gem.h | 3 +-- 6 files changed, 23 insertions(+), 37 deletions(-) diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index e3ed684ddcf2..15acb958ecd5 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1656,8 +1656,7 @@ drm_gem_lru_scan(struct drm_device *dev, struct drm_gem_lru *lru, unsigned int nr_to_scan, unsigned long *remaining, - bool (*shrink)(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket), - struct ww_acquire_ctx *ticket) + bool (*shrink)(struct drm_gem_object *obj)) { struct drm_gem_lru still_in_lru; struct drm_gem_object *obj; @@ -1690,20 +1689,17 @@ drm_gem_lru_scan(struct drm_device *dev, */ mutex_unlock(&dev->gem_lru_mutex); - if (ticket) - ww_acquire_init(ticket, &reservation_ww_class); - /* * Note that this still needs to be trylock, since we can * hit shrinker in response to trying to get backing pages * for this obj (ie. while it's lock is already held) */ - if (!ww_mutex_trylock(&obj->resv->lock, ticket)) { + if (!ww_mutex_trylock(&obj->resv->lock, NULL)) { *remaining += obj->size >> PAGE_SHIFT; goto tail; } - if (shrink(obj, ticket)) { + if (shrink(obj)) { freed += obj->size >> PAGE_SHIFT; /* @@ -1727,9 +1723,6 @@ drm_gem_lru_scan(struct drm_device *dev, dma_resv_unlock(obj->resv); - if (ticket) - ww_acquire_fini(ticket); - tail: drm_gem_object_put(obj); mutex_lock(&dev->gem_lru_mutex); diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 9d2788f79ace..3514d5c84989 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -102,7 +102,7 @@ with_vm_locks(void (*fn)(struct drm_gem_object *obj), } static bool -purge(struct drm_gem_object *obj, struct ww_acquire_ctx *unused) +purge(struct drm_gem_object *obj) { if (!is_purgeable(to_msm_bo(obj))) return false; @@ -114,7 +114,7 @@ purge(struct drm_gem_object *obj, struct ww_acquire_ctx *unused) } static bool -evict(struct drm_gem_object *obj, struct ww_acquire_ctx *unused) +evict(struct drm_gem_object *obj) { if (is_unevictable(to_msm_bo(obj))) return false; @@ -133,21 +133,21 @@ wait_for_idle(struct drm_gem_object *obj) } static bool -active_purge(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket) +active_purge(struct drm_gem_object *obj) { if (!wait_for_idle(obj)) return false; - return purge(obj, ticket); + return purge(obj); } static bool -active_evict(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket) +active_evict(struct drm_gem_object *obj) { if (!wait_for_idle(obj)) return false; - return evict(obj, ticket); + return evict(obj); } static unsigned long @@ -156,7 +156,7 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) struct msm_drm_private *priv = shrinker->private_data; struct { struct drm_gem_lru *lru; - bool (*shrink)(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket); + bool (*shrink)(struct drm_gem_object *obj); bool cond; unsigned long freed; unsigned long remaining; @@ -180,8 +180,7 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) stages[i].freed = drm_gem_lru_scan(priv->dev, stages[i].lru, nr, &stages[i].remaining, - stages[i].shrink, - NULL); + stages[i].shrink); nr -= stages[i].freed; freed += stages[i].freed; remaining += stages[i].remaining; @@ -222,7 +221,7 @@ msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan) static const int vmap_shrink_limit = 15; static bool -vmap_shrink(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket) +vmap_shrink(struct drm_gem_object *obj) { if (!is_vunmapable(to_msm_bo(obj))) return false; @@ -250,8 +249,7 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) unmapped += drm_gem_lru_scan(priv->dev, lrus[idx], vmap_shrink_limit - unmapped, &remaining, - vmap_shrink, - NULL); + vmap_shrink); } *(unsigned long *)ptr += unmapped; diff --git a/drivers/gpu/drm/panthor/panthor_gem.c b/drivers/gpu/drm/panthor/panthor_gem.c index 54535bae2b0c..17408f832af3 100644 --- a/drivers/gpu/drm/panthor/panthor_gem.c +++ b/drivers/gpu/drm/panthor/panthor_gem.c @@ -1392,8 +1392,7 @@ panthor_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) return count ? count : SHRINK_EMPTY; } -static bool panthor_gem_try_evict_no_resv_wait(struct drm_gem_object *obj, - struct ww_acquire_ctx *ticket) +static bool panthor_gem_try_evict_no_resv_wait(struct drm_gem_object *obj) { /* * Track last locked entry for unwinding locks in error and @@ -1479,8 +1478,7 @@ static bool panthor_gem_try_evict_no_resv_wait(struct drm_gem_object *obj, return ret == 0; } -static bool panthor_gem_try_evict(struct drm_gem_object *obj, - struct ww_acquire_ctx *ticket) +static bool panthor_gem_try_evict(struct drm_gem_object *obj) { struct panthor_gem_object *bo = to_panthor_bo(obj); @@ -1488,7 +1486,7 @@ static bool panthor_gem_try_evict(struct drm_gem_object *obj, if (dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_BOOKKEEP, false, 10) <= 0) return false; - return panthor_gem_try_evict_no_resv_wait(&bo->base, ticket); + return panthor_gem_try_evict_no_resv_wait(&bo->base); } static unsigned long @@ -1503,13 +1501,13 @@ panthor_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) freed += drm_gem_lru_scan(&ptdev->base, &ptdev->reclaim.unused, sc->nr_to_scan - freed, &remaining, - panthor_gem_try_evict_no_resv_wait, NULL); + panthor_gem_try_evict_no_resv_wait); if (freed >= sc->nr_to_scan) goto out; freed += drm_gem_lru_scan(&ptdev->base, &ptdev->reclaim.mmapped, sc->nr_to_scan - freed, &remaining, - panthor_gem_try_evict_no_resv_wait, NULL); + panthor_gem_try_evict_no_resv_wait); if (freed >= sc->nr_to_scan) goto out; @@ -1523,7 +1521,7 @@ panthor_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) freed += drm_gem_lru_scan(&ptdev->base, &ptdev->reclaim.gpu_mapped_shared, sc->nr_to_scan - freed, &remaining, - panthor_gem_try_evict, NULL); + panthor_gem_try_evict); out: #ifdef CONFIG_DEBUG_FS diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c index e10dbd18d8cf..ab070bc74857 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -3133,8 +3133,7 @@ int panthor_vm_prepare_mapped_bos_resvs(struct drm_exec *exec, struct panthor_vm unsigned long panthor_mmu_reclaim_priv_bos(struct panthor_device *ptdev, unsigned int nr_to_scan, unsigned long *remaining, - bool (*shrink)(struct drm_gem_object *, - struct ww_acquire_ctx *)) + bool (*shrink)(struct drm_gem_object *)) { unsigned long freed = 0; LIST_HEAD(remaining_vms); @@ -3160,7 +3159,7 @@ panthor_mmu_reclaim_priv_bos(struct panthor_device *ptdev, freed += drm_gem_lru_scan(&ptdev->base, &vm->reclaim.lru, nr_to_scan - freed, - remaining, shrink, NULL); + remaining, shrink); mutex_lock(&ptdev->base.gem_lru_mutex); diff --git a/drivers/gpu/drm/panthor/panthor_mmu.h b/drivers/gpu/drm/panthor/panthor_mmu.h index 3522fbbce369..abc36e7204be 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.h +++ b/drivers/gpu/drm/panthor/panthor_mmu.h @@ -52,8 +52,7 @@ int panthor_vm_evict_bo_mappings_locked(struct panthor_gem_object *bo); unsigned long panthor_mmu_reclaim_priv_bos(struct panthor_device *ptdev, unsigned int nr_to_scan, unsigned long *remaining, - bool (*shrink)(struct drm_gem_object *, - struct ww_acquire_ctx *)); + bool (*shrink)(struct drm_gem_object *)); int panthor_vm_prepare_mapped_bos_resvs(struct drm_exec *exec, struct panthor_vm *vm, u32 slot_count); diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 8a704f6a65c1..ffa607c91aa2 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -616,8 +616,7 @@ drm_gem_lru_scan(struct drm_device *dev, struct drm_gem_lru *lru, unsigned int nr_to_scan, unsigned long *remaining, - bool (*shrink)(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket), - struct ww_acquire_ctx *ticket); + bool (*shrink)(struct drm_gem_object *obj)); int drm_gem_evict_locked(struct drm_gem_object *obj); -- 2.55.0