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* [PATCH] media: platform: constify vb2_ops structures
@ 2017-01-21  9:29 Bhumika Goyal
  2017-01-25 10:08 ` Lad, Prabhakar
  0 siblings, 1 reply; 7+ messages in thread
From: Bhumika Goyal @ 2017-01-21  9:29 UTC (permalink / raw)
  To: julia.lawall, prabhakar.csengg, mchehab, minghsiu.tsai,
	houlong.wei, andrew-ct.chen, matthias.bgg, linux-media,
	linux-kernel, linux-arm-kernel, linux-mediatek
  Cc: Bhumika Goyal

Declare vb2_ops structures as const as they are only stored in
the ops field of a vb2_queue structure. This field is of type
const, so vb2_ops structures having same properties can be made
const too.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p={...};

@ok1@
identifier r1.i;
position p;
struct sta2x11_vip vip;
struct vb2_queue q;
@@
(
vip.vb_vidq.ops=&i@p
|
q.ops=&i@p
)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct vb2_ops i;

Cross compiled the media/platform/blackfin/bfin_capture.o file for
blackfin architecture.

File size before:
  text	   data	    bss	    dec	    hex	filename
  6776	    176	      0	   6952	   1b28 platform/blackfin/bfin_capture.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   6816	    136	      0	   6952	   1b28 platform/blackfin/bfin_capture.o

File size before:
   text	   data	    bss	    dec	    hex	filename
  12852	    456	    272	  13580	   350c platform/davinci/vpif_capture.o

File size after:
   text	   data	    bss	    dec	    hex	filename
  12932	    360	    272	  13564	   34fc platform/davinci/vpif_capture.o

File size before:
   text	   data	    bss	    dec	    hex	filename
  12285	    360	    276	  12921	   3279 platform/davinci/vpif_display.o

File size after:
   text	   data	    bss	    dec	    hex	filename
  12365	    296	    276	  12937	   3289 platform/davinci/vpif_display.o

File size details before and after applying the patch remains the same for
drivers/media/platform/pxa_camera.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
---
 drivers/media/platform/davinci/vpif_capture.c | 2 +-
 drivers/media/platform/davinci/vpif_display.c | 2 +-
 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c  | 2 +-
 drivers/media/platform/pxa_camera.c           | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index f791f5c..54c54d9 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -309,7 +309,7 @@ static void vpif_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irqrestore(&common->irqlock, flags);
 }
 
-static struct vb2_ops video_qops = {
+static const struct vb2_ops video_qops = {
 	.queue_setup		= vpif_buffer_queue_setup,
 	.buf_prepare		= vpif_buffer_prepare,
 	.start_streaming	= vpif_start_streaming,
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index e5f1844..9604afd 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -289,7 +289,7 @@ static void vpif_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irqrestore(&common->irqlock, flags);
 }
 
-static struct vb2_ops video_qops = {
+static const struct vb2_ops video_qops = {
 	.queue_setup		= vpif_buffer_queue_setup,
 	.wait_prepare		= vb2_ops_wait_prepare,
 	.wait_finish		= vb2_ops_wait_finish,
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
index 13afe48..3038d62 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
@@ -621,7 +621,7 @@ static void mtk_mdp_m2m_buf_queue(struct vb2_buffer *vb)
 	v4l2_m2m_buf_queue(ctx->m2m_ctx, to_vb2_v4l2_buffer(vb));
 }
 
-static struct vb2_ops mtk_mdp_m2m_qops = {
+static const struct vb2_ops mtk_mdp_m2m_qops = {
 	.queue_setup	 = mtk_mdp_m2m_queue_setup,
 	.buf_prepare	 = mtk_mdp_m2m_buf_prepare,
 	.buf_queue	 = mtk_mdp_m2m_buf_queue,
diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c
index 929006f..17167d1 100644
--- a/drivers/media/platform/pxa_camera.c
+++ b/drivers/media/platform/pxa_camera.c
@@ -1530,7 +1530,7 @@ static void pxac_vb2_stop_streaming(struct vb2_queue *vq)
 		pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_ERROR);
 }
 
-static struct vb2_ops pxac_vb2_ops = {
+static const struct vb2_ops pxac_vb2_ops = {
 	.queue_setup		= pxac_vb2_queue_setup,
 	.buf_init		= pxac_vb2_init,
 	.buf_prepare		= pxac_vb2_prepare,
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 7+ messages in thread
* [PATCH] [media] platform: constify vb2_ops structures
@ 2016-09-08 23:59 Julia Lawall
  2016-09-09  8:42 ` Laurent Pinchart
                   ` (3 more replies)
  0 siblings, 4 replies; 7+ messages in thread
From: Julia Lawall @ 2016-09-08 23:59 UTC (permalink / raw)
  To: Sylwester Nawrocki
  Cc: kernel-janitors, Fabien Dessenne, linux-samsung-soc,
	Krzysztof Kozlowski, Kukjin Kim, Andrzej Hajda, Kamil Debski,
	Kyungmin Park, Benoit Parrot, Guennadi Liakhovetski,
	Ludovic Desroches, Hyun Kwon, Laurent Pinchart,
	Mauro Carvalho Chehab, Michal Simek, Sören Brinkmann,
	linux-media, linux-arm-kernel, linux-kernel,
	Andrzej Pietrasiewicz, Jacek Anaszewski, Mikhail Ulyanov,
	Matthias Brugger, linux-mediatek

Check for vb2_ops structures that are only stored in the ops field of a
vb2_queue structure.  That field is declared const, so vb2_ops structures
that have this property can be declared as const also.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p = { ... };

@ok@
identifier r.i;
struct vb2_queue e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct vb2_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct vb2_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/media/platform/exynos-gsc/gsc-m2m.c              |    2 +-
 drivers/media/platform/exynos4-is/fimc-capture.c         |    2 +-
 drivers/media/platform/exynos4-is/fimc-m2m.c             |    2 +-
 drivers/media/platform/m2m-deinterlace.c                 |    2 +-
 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c       |    2 +-
 drivers/media/platform/mx2_emmaprp.c                     |    2 +-
 drivers/media/platform/rcar-vin/rcar-dma.c               |    2 +-
 drivers/media/platform/rcar_jpu.c                        |    2 +-
 drivers/media/platform/s5p-g2d/g2d.c                     |    2 +-
 drivers/media/platform/s5p-jpeg/jpeg-core.c              |    2 +-
 drivers/media/platform/sh_vou.c                          |    2 +-
 drivers/media/platform/soc_camera/atmel-isi.c            |    2 +-
 drivers/media/platform/soc_camera/rcar_vin.c             |    2 +-
 drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c |    2 +-
 drivers/media/platform/sti/bdisp/bdisp-v4l2.c            |    2 +-
 drivers/media/platform/ti-vpe/cal.c                      |    2 +-
 drivers/media/platform/ti-vpe/vpe.c                      |    2 +-
 drivers/media/platform/vim2m.c                           |    2 +-
 drivers/media/platform/xilinx/xilinx-dma.c               |    2 +-
 19 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
index 7ae1a13..1d5836c 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.c
+++ b/drivers/media/platform/xilinx/xilinx-dma.c
@@ -474,7 +474,7 @@ static void xvip_dma_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irq(&dma->queued_lock);
 }
 
-static struct vb2_ops xvip_dma_queue_qops = {
+static const struct vb2_ops xvip_dma_queue_qops = {
 	.queue_setup = xvip_dma_queue_setup,
 	.buf_prepare = xvip_dma_buffer_prepare,
 	.buf_queue = xvip_dma_buffer_queue,
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 30211f6..46de657 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -536,7 +536,7 @@ static void stop_streaming(struct vb2_queue *vq)
 	pm_runtime_put(ici->v4l2_dev.dev);
 }
 
-static struct vb2_ops isi_video_qops = {
+static const struct vb2_ops isi_video_qops = {
 	.queue_setup		= queue_setup,
 	.buf_init		= buffer_init,
 	.buf_prepare		= buffer_prepare,
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 785e693..d9c07b8 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -2538,7 +2538,7 @@ static void s5p_jpeg_stop_streaming(struct vb2_queue *q)
 	pm_runtime_put(ctx->jpeg->dev);
 }
 
-static struct vb2_ops s5p_jpeg_qops = {
+static const struct vb2_ops s5p_jpeg_qops = {
 	.queue_setup		= s5p_jpeg_queue_setup,
 	.buf_prepare		= s5p_jpeg_buf_prepare,
 	.buf_queue		= s5p_jpeg_buf_queue,
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index e967fcf..44323cb 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -1379,7 +1379,7 @@ static void cal_stop_streaming(struct vb2_queue *vq)
 	cal_runtime_put(ctx->dev);
 }
 
-static struct vb2_ops cal_video_qops = {
+static const struct vb2_ops cal_video_qops = {
 	.queue_setup		= cal_queue_setup,
 	.buf_prepare		= cal_buffer_prepare,
 	.buf_queue		= cal_buffer_queue,
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 55a1458..0189f7f 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -1878,7 +1878,7 @@ static void vpe_stop_streaming(struct vb2_queue *q)
 	vpdma_dump_regs(ctx->dev->vpdma);
 }
 
-static struct vb2_ops vpe_qops = {
+static const struct vb2_ops vpe_qops = {
 	.queue_setup	 = vpe_queue_setup,
 	.buf_prepare	 = vpe_buf_prepare,
 	.buf_queue	 = vpe_buf_queue,
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 9c13752..0009fc5 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -856,7 +856,7 @@ static void rcar_vin_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irq(&priv->lock);
 }
 
-static struct vb2_ops rcar_vin_vb2_ops = {
+static const struct vb2_ops rcar_vin_vb2_ops = {
 	.queue_setup	= rcar_vin_videobuf_setup,
 	.buf_queue	= rcar_vin_videobuf_queue,
 	.stop_streaming	= rcar_vin_stop_streaming,
diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
index 02b519d..02c8dc5 100644
--- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
+++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
@@ -470,7 +470,7 @@ static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
 	sh_mobile_ceu_soft_reset(pcdev);
 }
 
-static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
+static const struct vb2_ops sh_mobile_ceu_videobuf_ops = {
 	.queue_setup	= sh_mobile_ceu_videobuf_setup,
 	.buf_prepare	= sh_mobile_ceu_videobuf_prepare,
 	.buf_queue	= sh_mobile_ceu_videobuf_queue,
diff --git a/drivers/media/platform/s5p-g2d/g2d.c b/drivers/media/platform/s5p-g2d/g2d.c
index 391dd7a..62c0dec 100644
--- a/drivers/media/platform/s5p-g2d/g2d.c
+++ b/drivers/media/platform/s5p-g2d/g2d.c
@@ -138,7 +138,7 @@ static void g2d_buf_queue(struct vb2_buffer *vb)
 	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
 }
 
-static struct vb2_ops g2d_qops = {
+static const struct vb2_ops g2d_qops = {
 	.queue_setup	= g2d_queue_setup,
 	.buf_prepare	= g2d_buf_prepare,
 	.buf_queue	= g2d_buf_queue,
diff --git a/drivers/media/platform/rcar_jpu.c b/drivers/media/platform/rcar_jpu.c
index 16782ce..d1746ec 100644
--- a/drivers/media/platform/rcar_jpu.c
+++ b/drivers/media/platform/rcar_jpu.c
@@ -1183,7 +1183,7 @@ static void jpu_stop_streaming(struct vb2_queue *vq)
 	}
 }
 
-static struct vb2_ops jpu_qops = {
+static const struct vb2_ops jpu_qops = {
 	.queue_setup		= jpu_queue_setup,
 	.buf_prepare		= jpu_buf_prepare,
 	.buf_queue		= jpu_buf_queue,
diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c
index ec6494c..a341a7f 100644
--- a/drivers/media/platform/exynos-gsc/gsc-m2m.c
+++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c
@@ -261,7 +261,7 @@ static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
 		v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
 }
 
-static struct vb2_ops gsc_m2m_qops = {
+static const struct vb2_ops gsc_m2m_qops = {
 	.queue_setup	 = gsc_m2m_queue_setup,
 	.buf_prepare	 = gsc_m2m_buf_prepare,
 	.buf_queue	 = gsc_m2m_buf_queue,
diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c
index e1f39b4..1ec9a2e 100644
--- a/drivers/media/platform/sh_vou.c
+++ b/drivers/media/platform/sh_vou.c
@@ -362,7 +362,7 @@ static void sh_vou_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irqrestore(&vou_dev->lock, flags);
 }
 
-static struct vb2_ops sh_vou_qops = {
+static const struct vb2_ops sh_vou_qops = {
 	.queue_setup		= sh_vou_queue_setup,
 	.buf_prepare		= sh_vou_buf_prepare,
 	.buf_queue		= sh_vou_buf_queue,
diff --git a/drivers/media/platform/sti/bdisp/bdisp-v4l2.c b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
index 3b1ac68..45f82b5 100644
--- a/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
+++ b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
@@ -527,7 +527,7 @@ static void bdisp_stop_streaming(struct vb2_queue *q)
 	pm_runtime_put(ctx->bdisp_dev->dev);
 }
 
-static struct vb2_ops bdisp_qops = {
+static const struct vb2_ops bdisp_qops = {
 	.queue_setup     = bdisp_queue_setup,
 	.buf_prepare     = bdisp_buf_prepare,
 	.buf_queue       = bdisp_buf_queue,
diff --git a/drivers/media/platform/m2m-deinterlace.c b/drivers/media/platform/m2m-deinterlace.c
index 0fcb5c78..0870fad 100644
--- a/drivers/media/platform/m2m-deinterlace.c
+++ b/drivers/media/platform/m2m-deinterlace.c
@@ -852,7 +852,7 @@ static void deinterlace_buf_queue(struct vb2_buffer *vb)
 	v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
 }
 
-static struct vb2_ops deinterlace_qops = {
+static const struct vb2_ops deinterlace_qops = {
 	.queue_setup	 = deinterlace_queue_setup,
 	.buf_prepare	 = deinterlace_buf_prepare,
 	.buf_queue	 = deinterlace_buf_queue,
diff --git a/drivers/media/platform/mx2_emmaprp.c b/drivers/media/platform/mx2_emmaprp.c
index c639406..e68d271 100644
--- a/drivers/media/platform/mx2_emmaprp.c
+++ b/drivers/media/platform/mx2_emmaprp.c
@@ -743,7 +743,7 @@ static void emmaprp_buf_queue(struct vb2_buffer *vb)
 	v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
 }
 
-static struct vb2_ops emmaprp_qops = {
+static const struct vb2_ops emmaprp_qops = {
 	.queue_setup	 = emmaprp_queue_setup,
 	.buf_prepare	 = emmaprp_buf_prepare,
 	.buf_queue	 = emmaprp_buf_queue,
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 496aa97..07c07c1 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -1116,7 +1116,7 @@ static void rvin_stop_streaming(struct vb2_queue *vq)
 	rvin_disable_interrupts(vin);
 }
 
-static struct vb2_ops rvin_qops = {
+static const struct vb2_ops rvin_qops = {
 	.queue_setup		= rvin_queue_setup,
 	.buf_prepare		= rvin_buffer_prepare,
 	.buf_queue		= rvin_buffer_queue,
diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c
index cd0ff4a..a98f679 100644
--- a/drivers/media/platform/vim2m.c
+++ b/drivers/media/platform/vim2m.c
@@ -815,7 +815,7 @@ static void vim2m_stop_streaming(struct vb2_queue *q)
 	}
 }
 
-static struct vb2_ops vim2m_qops = {
+static const struct vb2_ops vim2m_qops = {
 	.queue_setup	 = vim2m_queue_setup,
 	.buf_prepare	 = vim2m_buf_prepare,
 	.buf_queue	 = vim2m_buf_queue,
diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c
index fdec499..344028e 100644
--- a/drivers/media/platform/exynos4-is/fimc-capture.c
+++ b/drivers/media/platform/exynos4-is/fimc-capture.c
@@ -452,7 +452,7 @@ static void buffer_queue(struct vb2_buffer *vb)
 	spin_unlock_irqrestore(&fimc->slock, flags);
 }
 
-static struct vb2_ops fimc_capture_qops = {
+static const struct vb2_ops fimc_capture_qops = {
 	.queue_setup		= queue_setup,
 	.buf_prepare		= buffer_prepare,
 	.buf_queue		= buffer_queue,
diff --git a/drivers/media/platform/exynos4-is/fimc-m2m.c b/drivers/media/platform/exynos4-is/fimc-m2m.c
index b1309e1..6028e4f 100644
--- a/drivers/media/platform/exynos4-is/fimc-m2m.c
+++ b/drivers/media/platform/exynos4-is/fimc-m2m.c
@@ -219,7 +219,7 @@ static void fimc_buf_queue(struct vb2_buffer *vb)
 	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
 }
 
-static struct vb2_ops fimc_qops = {
+static const struct vb2_ops fimc_qops = {
 	.queue_setup	 = fimc_queue_setup,
 	.buf_prepare	 = fimc_buf_prepare,
 	.buf_queue	 = fimc_buf_queue,
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
index 3ed3f2d..f8e4611 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
@@ -864,7 +864,7 @@ static void vb2ops_venc_stop_streaming(struct vb2_queue *q)
 	ctx->state = MTK_STATE_FREE;
 }
 
-static struct vb2_ops mtk_venc_vb2_ops = {
+static const struct vb2_ops mtk_venc_vb2_ops = {
 	.queue_setup		= vb2ops_venc_queue_setup,
 	.buf_prepare		= vb2ops_venc_buf_prepare,
 	.buf_queue		= vb2ops_venc_buf_queue,

^ permalink raw reply related	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2017-01-25 10:09 UTC | newest]

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2017-01-21  9:29 [PATCH] media: platform: constify vb2_ops structures Bhumika Goyal
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2016-09-08 23:59 [PATCH] [media] " Julia Lawall
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2016-09-09 16:03 ` Benoit Parrot

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