[PATCH 2/2] drm/atomic: Create and use __drm_atomic_helper_crtc_reset() everywhere

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

We already have __drm_atomic_helper_connector_reset() and
__drm_atomic_helper_plane_reset(), extend this to crtc as well.

Most drivers already have a gpu reset hook, correct it.
Nouveau already implemented its own __drm_atomic_helper_crtc_reset(),
convert it to the common one.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Tony Cheng <Tony.Cheng@amd.com>
Cc: Shirish S <shirish.s@amd.com>
Cc: Mikita Lipski <mikita.lipski@amd.com>
Cc: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Cc: David Francis <David.Francis@amd.com>
Cc: Anthony Koo <Anthony.Koo@amd.com>
Cc: Jeykumar Sankaran <jsanka@codeaurora.org>
Cc: Jordan Crouse <jcrouse@codeaurora.org>
Cc: Bruce Wang <bzwang@chromium.org>
Cc: Sravanthi Kollukuduru <skolluku@codeaurora.org>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Steve Kowalik <steven@wedontsleep.org>
Cc: Carsten Behling <carsten.behling@googlemail.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: intel-gfx@lists.freedesktop.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-tegra@vger.kernel.org
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  4 +--
 drivers/gpu/drm/arm/malidp_crtc.c             |  5 +--
 .../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c    |  5 +--
 drivers/gpu/drm/drm_atomic_state_helper.c     | 31 ++++++++++++++++---
 drivers/gpu/drm/i915/intel_display.c          |  2 +-
 drivers/gpu/drm/imx/ipuv3-crtc.c              |  5 +--
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c       |  5 +--
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c      | 12 ++-----
 drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c     |  6 +---
 drivers/gpu/drm/nouveau/dispnv50/head.c       | 13 ++------
 drivers/gpu/drm/omapdrm/omap_crtc.c           |  7 ++---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c        |  4 +--
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c   |  7 +++--
 drivers/gpu/drm/tegra/dc.c                    |  5 +--
 drivers/gpu/drm/vc4/vc4_crtc.c                |  8 ++---
 drivers/gpu/drm/vkms/vkms_crtc.c              |  7 +----
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c           |  9 +-----
 include/drm/drm_atomic_state_helper.h         |  2 ++
 18 files changed, 56 insertions(+), 81 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5064768642f3..770a71726cd1 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2802,9 +2802,7 @@ static void dm_crtc_reset_state(struct drm_crtc *crtc)
 	if (WARN_ON(!state))
 		return;
 
-	crtc->state = &state->base;
-	crtc->state->crtc = crtc;
-
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c
index e1b72782848c..9a924ff27148 100644
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -474,10 +474,7 @@ static void malidp_crtc_reset(struct drm_crtc *crtc)
 
 	kfree(state);
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static void malidp_crtc_destroy_state(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 96f4082671fe..8084d549c7d1 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -412,10 +412,7 @@ static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
 	}
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 3ba996069d69..3eee1ca33fc5 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -55,6 +55,29 @@
  * for these functions.
  */
 
+/**
+ * __drm_atomic_helper_crtc_reset - reset state on CRTC
+ * @crtc: drm CRTC
+ * @crtc_state: CRTC state to assign
+ *
+ * Initializes the newly allocated @crtc_state and assigns it to
+ * the &drm_conector->state pointer of @crtc, usually required when
+ * initializing the drivers or when called from the &drm_crtc_funcs.reset
+ * hook.
+ *
+ * This is useful for drivers that subclass the CRTC state.
+ */
+void
+__drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
+			       struct drm_crtc_state *crtc_state)
+{
+	if (crtc_state)
+		crtc_state->crtc = crtc;
+
+	crtc->state = crtc_state;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_crtc_reset);
+
 /**
  * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
  * @crtc: drm CRTC
@@ -64,14 +87,14 @@
  */
 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
 {
+	struct drm_crtc_state *crtc_state =
+		kzalloc(sizeof(*crtc->state), GFP_KERNEL);
+
 	if (crtc->state)
 		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 
 	kfree(crtc->state);
-	crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
-
-	if (crtc->state)
-		crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, crtc_state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f383417571ec..907ffeb64781 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15457,7 +15457,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 
 		__drm_atomic_helper_crtc_destroy_state(&crtc_state->base);
 		memset(crtc_state, 0, sizeof(*crtc_state));
-		crtc_state->base.crtc = &crtc->base;
+		__drm_atomic_helper_crtc_reset(&crtc->base, &crtc_state->base);
 
 		crtc_state->base.active = crtc_state->base.enable =
 			dev_priv->display.get_pipe_config(crtc, crtc_state);
diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index 7d4b710b837a..8bc36f0d2b6b 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -120,12 +120,9 @@ static void imx_drm_crtc_reset(struct drm_crtc *crtc)
 		memset(state, 0, sizeof(*state));
 	} else {
 		state = kzalloc(sizeof(*state), GFP_KERNEL);
-		if (!state)
-			return;
-		crtc->state = &state->base;
 	}
 
-	state->base.crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *imx_drm_crtc_duplicate_state(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 92ecb9bf982c..a743e5ed1177 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -119,12 +119,9 @@ static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
 		memset(state, 0, sizeof(*state));
 	} else {
 		state = kzalloc(sizeof(*state), GFP_KERNEL);
-		if (!state)
-			return;
-		crtc->state = &state->base;
 	}
 
-	state->base.crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 }
 
 static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index d4530d60767b..c86e603f486a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -894,20 +894,12 @@ static void dpu_crtc_reset(struct drm_crtc *crtc)
 		_dpu_crtc_set_suspend(crtc, false);
 
 	/* remove previous state, if present */
-	if (crtc->state) {
+	if (crtc->state)
 		dpu_crtc_destroy_state(crtc, crtc->state);
-		crtc->state = 0;
-	}
 
 	dpu_crtc = to_dpu_crtc(crtc);
 	cstate = kzalloc(sizeof(*cstate), GFP_KERNEL);
-	if (!cstate) {
-		DPU_ERROR("failed to allocate state\n");
-		return;
-	}
-
-	cstate->base.crtc = crtc;
-	crtc->state = &cstate->base;
+	__drm_atomic_helper_crtc_reset(crtc, &cstate->base);
 }
 
 static void dpu_crtc_handle_power_event(u32 event_type, void *arg)
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
index b1da9ce54379..138da66b1530 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
@@ -1019,11 +1019,7 @@ static void mdp5_crtc_reset(struct drm_crtc *crtc)
 	}
 
 	mdp5_cstate = kzalloc(sizeof(*mdp5_cstate), GFP_KERNEL);
-
-	if (mdp5_cstate) {
-		mdp5_cstate->base.crtc = crtc;
-		crtc->state = &mdp5_cstate->base;
-	}
+	__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/nouveau/dispnv50/head.c b/drivers/gpu/drm/nouveau/dispnv50/head.c
index 4f57e5379796..341600406589 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/head.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/head.c
@@ -418,16 +418,6 @@ nv50_head_atomic_duplicate_state(struct drm_crtc *crtc)
 	return &asyh->state;
 }
 
-static void
-__drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
-			       struct drm_crtc_state *state)
-{
-	if (crtc->state)
-		crtc->funcs->atomic_destroy_state(crtc, crtc->state);
-	crtc->state = state;
-	crtc->state->crtc = crtc;
-}
-
 static void
 nv50_head_reset(struct drm_crtc *crtc)
 {
@@ -436,6 +426,9 @@ nv50_head_reset(struct drm_crtc *crtc)
 	if (WARN_ON(!(asyh = kzalloc(sizeof(*asyh), GFP_KERNEL))))
 		return;
 
+	if (crtc->state)
+		crtc->funcs->atomic_destroy_state(crtc, crtc->state);
+
 	__drm_atomic_helper_crtc_reset(crtc, &asyh->state);
 }
 
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index caffc547ef97..9c5f8109913c 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -554,14 +554,13 @@ static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
 
 static void omap_crtc_reset(struct drm_crtc *crtc)
 {
+	struct omap_crtc_state *crtc_state =
+		kzalloc(sizeof(*crtc_state), GFP_KERNEL);
 	if (crtc->state)
 		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 
 	kfree(crtc->state);
-	crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL);
-
-	if (crtc->state)
-		crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 17741843cf51..7beab22b4674 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -857,14 +857,12 @@ static void rcar_du_crtc_reset(struct drm_crtc *crtc)
 	}
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	__drm_atomic_helper_crtc_reset(crtc, &state->state);
 	if (state == NULL)
 		return;
 
 	state->crc.source = VSP1_DU_CRC_NONE;
 	state->crc.index = 0;
-
-	crtc->state = &state->state;
-	crtc->state->crtc = crtc;
 }
 
 static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index fb70fb486fbf..d2d5aa676084 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1071,13 +1071,14 @@ static void vop_crtc_destroy(struct drm_crtc *crtc)
 
 static void vop_crtc_reset(struct drm_crtc *crtc)
 {
+	struct rockchip_crtc_state *crtc_state =
+		kzalloc(sizeof(*crtc_state), GFP_KERNEL);
+
 	if (crtc->state)
 		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 	kfree(crtc->state);
 
-	crtc->state = kzalloc(sizeof(struct rockchip_crtc_state), GFP_KERNEL);
-	if (crtc->state)
-		crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
 }
 
 static struct drm_crtc_state *vop_crtc_duplicate_state(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index f80e82e16475..140d6191d8d2 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1164,10 +1164,7 @@ static void tegra_crtc_reset(struct drm_crtc *crtc)
 	crtc->state = NULL;
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
 
 	drm_crtc_vblank_reset(crtc);
 }
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index cd226e63d557..76beeda157fc 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -998,12 +998,12 @@ static void vc4_crtc_destroy_state(struct drm_crtc *crtc,
 static void
 vc4_crtc_reset(struct drm_crtc *crtc)
 {
-	if (crtc->state)
-		vc4_crtc_destroy_state(crtc->state);
+	struct vc4_crtc_state *crtc_state =
+		kzalloc(sizeof(*crtc_state), GFP_KERNEL);
 
-	crtc->state = kzalloc(sizeof(struct vc4_crtc_state), GFP_KERNEL);
 	if (crtc->state)
-		crtc->state->crtc = crtc;
+		vc4_crtc_destroy_state(crtc, crtc->state);
+	__drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
 }
 
 static const struct drm_crtc_funcs vc4_crtc_funcs = {
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 177bbcb38306..7b018f6ee971 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -98,15 +98,10 @@ static void vkms_atomic_crtc_reset(struct drm_crtc *crtc)
 		vkms_state = to_vkms_crtc_state(crtc->state);
 		__drm_atomic_helper_crtc_destroy_state(crtc->state);
 		kfree(vkms_state);
-		crtc->state = NULL;
 	}
 
 	vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
-	if (!vkms_state)
-		return;
-
-	crtc->state = &vkms_state->base;
-	crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &vkms_state->base);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index e6b11f6ae2e4..2878bc0a4718 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -633,14 +633,7 @@ void vmw_du_crtc_reset(struct drm_crtc *crtc)
 	}
 
 	vcs = kzalloc(sizeof(*vcs), GFP_KERNEL);
-
-	if (!vcs) {
-		DRM_ERROR("Cannot allocate vmw_crtc_state\n");
-		return;
-	}
-
-	crtc->state = &vcs->base;
-	crtc->state->crtc = crtc;
+	__drm_atomic_helper_crtc_reset(crtc, &vcs->base);
 }
 
 
diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
index 5b82ccfdb502..ab2b5a49948c 100644
--- a/include/drm/drm_atomic_state_helper.h
+++ b/include/drm/drm_atomic_state_helper.h
@@ -37,6 +37,8 @@ struct drm_private_state;
 struct drm_modeset_acquire_ctx;
 struct drm_device;
 
+void __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
+				    struct drm_crtc_state *state);
 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 					      struct drm_crtc_state *state);
-- 
2.19.1

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