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Intro

For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.

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Duplication Overall

3% duplication:

402,409 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
13,324 duplicated lines

1,593 duplicates

Duplication per Extension

Duplication per Component (primary)

Duplication Between Components (50+ lines)

Download: SVG DOT (open online Graphviz editor)

From Component --> To Component	Duplicated Lines	File Pairs	Details
linux (<1%) --> uapi (<1%)	107	6 file pairs	details...
dt-bindings (4%) --> linux (<1%)	84	2 file pairs	details...
net (<1%) --> uapi (<1%)	72	3 file pairs	details...
sound (<1%) --> uapi (<1%)	55	2 file pairs	details...
media (<1%) --> uapi (<1%)	54	1 file pair	details...

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Show more details on duplication between components...

Longest Duplicates

The list of 50 longest duplicates.

See data for all 1,593 duplicates...

Size	#	Folders	Files	Lines	Code
83	x 2	trace/events trace/events	scsi.h target.h	15:97 (31%) 17:99 (45%)	view
54	x 2	asm-generic asm-generic	xor.h xor.h	240:293 (8%) 614:667 (8%)	view
45	x 2	asm-generic asm-generic	xor.h xor.h	185:229 (7%) 544:588 (7%)	view
36	x 2	asm-generic asm-generic	xor.h xor.h	139:174 (5%) 485:520 (5%)	view
35	x 2	asm-generic asm-generic	xor.h xor.h	181:216 (5%) 236:271 (5%)	view
33	x 2	asm-generic asm-generic	xor.h xor.h	543:575 (5%) 613:645 (5%)	view
32	x 2	asm-generic asm-generic	xor.h xor.h	240:271 (5%) 544:575 (5%)	view
32	x 2	asm-generic asm-generic	xor.h xor.h	185:216 (5%) 614:645 (5%)	view
30	x 2	dt-bindings/usb linux/usb	pd.h pd_vdo.h	133:466 (71%) 144:491 (88%)	view
30	x 2	asm-generic asm-generic	termios-base.h termios.h	18:62 (93%) 23:67 (60%)	view
28	x 2	trace/events trace/events	i2c.h i2c.h	26:53 (26%) 90:117 (26%)	view
28	x 2	trace/events trace/events	neigh.h neigh.h	98:133 (14%) 175:211 (14%)	view
27	x 2	asm-generic asm-generic	xor.h xor.h	135:162 (4%) 181:208 (4%)	view
27	x 2	asm-generic asm-generic	xor.h xor.h	135:162 (4%) 236:263 (4%)	view
27	x 2	asm-generic asm-generic	xor.h xor.h	102:128 (4%) 437:463 (4%)	view
25	x 2	asm-generic asm-generic	xor.h xor.h	484:508 (4%) 543:567 (4%)	view
25	x 2	asm-generic asm-generic	xor.h xor.h	484:508 (4%) 613:637 (4%)	view
25	x 2	uapi/linux uapi/linux	iso_fs.h iso_fs.h	39:63 (20%) 76:100 (20%)	view
24	x 2	acpi acpi	actbl2.h actbl2.h	1785:1808 (1%) 1813:1836 (1%)	view
24	x 2	trace/events trace/events	ext4.h ext4.h	2126:2153 (1%) 2215:2242 (1%)	view
24	x 2	asm-generic asm-generic	xor.h xor.h	240:263 (3%) 485:508 (3%)	view
24	x 2	asm-generic asm-generic	xor.h xor.h	139:162 (3%) 614:637 (3%)	view
24	x 2	asm-generic asm-generic	xor.h xor.h	185:208 (3%) 485:508 (3%)	view
24	x 2	asm-generic asm-generic	xor.h xor.h	139:162 (3%) 544:567 (3%)	view
23	x 2	trace/events trace/events	cachefiles.h cachefiles.h	448:474 (4%) 477:503 (4%)	view
23	x 2	trace/events trace/events	rpcrdma.h rpcrdma.h	97:123 (1%) 253:279 (1%)	view
22	x 2	linux/surface_aggregator linux/surface_aggregator	controller.h controller.h	448:469 (7%) 592:613 (7%)	view
22	x 2	trace/events trace/events	smbus.h smbus.h	64:86 (10%) 172:194 (10%)	view
22	x 2	uapi/rdma uapi/rdma	ib_user_verbs.h rdma_user_rxe.h	791:812 (2%) 76:97 (14%)	view
21	x 2	scsi scsi	sas.h sas.h	350:375 (4%) 583:608 (4%)	view
21	x 2	trace/events trace/events	cachefiles.h cachefiles.h	578:602 (4%) 605:629 (4%)	view
21	x 2	trace/events trace/events	objagg.h objagg.h	132:156 (12%) 159:183 (12%)	view
21	x 2	trace/events trace/events	rpcrdma.h rpcrdma.h	858:882 (1%) 885:909 (1%)	view
20	x 2	uapi/linux uapi/linux	cec-funcs.h cec-funcs.h	565:586 (1%) 721:742 (1%)	view
20	x 2	uapi/linux uapi/linux	cec-funcs.h cec-funcs.h	464:485 (1%) 620:641 (1%)	view
20	x 2	trace/events trace/events	rpcrdma.h rpcrdma.h	26:48 (1%) 134:156 (1%)	view
19	x 2	trace/events trace/events	ext4.h ext4.h	2357:2379 (<1%) 2382:2404 (<1%)	view
19	x 2	trace/events trace/events	sock.h sock.h	167:192 (10%) 228:253 (10%)	view
19	x 2	asm-generic asm-generic	xor.h xor.h	98:117 (3%) 181:200 (3%)	view
19	x 2	asm-generic asm-generic	xor.h xor.h	98:117 (3%) 236:255 (3%)	view
19	x 2	asm-generic asm-generic	xor.h xor.h	98:117 (3%) 135:154 (3%)	view
18	x 2	trace/events trace/events	qdisc.h qdisc.h	79:100 (17%) 104:125 (17%)	view
18	x 2	uapi/linux uapi/linux	bpf.h bpf.h	5513:5538 (1%) 5856:5873 (1%)	view
18	x 2	trace/events trace/events	rpcrdma.h sunrpc.h	1318:1339 (1%) 1228:1249 (<1%)	view
18	x 2	scsi scsi	sas.h sas.h	452:475 (3%) 685:708 (3%)	view
18	x 2	linux linux	virtio_config.h virtio_config.h	341:358 (5%) 405:422 (5%)	view
17	x 2	uapi/linux uapi/linux	nvme_ioctl.h nvme_ioctl.h	28:44 (30%) 49:65 (30%)	view
17	x 2	asm-generic asm-generic	xor.h xor.h	436:452 (2%) 484:500 (2%)	view
17	x 2	asm-generic asm-generic	xor.h xor.h	436:452 (2%) 543:559 (2%)	view
17	x 2	asm-generic asm-generic	xor.h xor.h	436:452 (2%) 613:629 (2%)	view

Duplicated Units

The list of top 23 duplicated units.

See data for all 23 unit duplicates...

Size	#	Folders	Files	Lines	Code
22	x 2	uapi/linux uapi/linux	cec-funcs.h cec-funcs.h	463:486 619:642	view
22	x 2	uapi/linux uapi/linux	cec-funcs.h cec-funcs.h	564:587 720:743	view
18	x 2	uapi/linux uapi/linux	cec-funcs.h cec-funcs.h	513:532 669:688	view
14	x 2	uapi/linux/usb uapi/linux/usb	video.h video.h	498:512 554:568	view
11	x 2	asm-generic asm-generic	termios.h termios-base.h	56:68 51:63	view
11	x 2	uapi/linux/usb uapi/linux/usb	audio.h audio.h	272:283 369:380	view
9	x 2	linux linux	moduleloader.h moduleloader.h	53:62 76:85	view
8	x 3	crypto crypto crypto	skcipher.h aead.h hash.h	552:560 465:473 659:667	view
8	x 3	crypto crypto crypto	acompress.h akcipher.h kpp.h	214:222 226:234 206:214	view
7	x 2	linux/rpmsg linux	byteorder.h virtio_byteorder.h	10:17 7:14	view
7	x 2	linux linux	bpf.h bpf.h	2258:2265 2304:2311	view
7	x 2	linux linux	genl_magic_struct.h genl_magic_struct.h	190:197 209:216	view
7	x 2	linux/gpio linux/gpio	consumer.h consumer.h	364:372 378:386	view
6	x 2	uapi/linux/usb uapi/linux/usb	audio.h audio.h	285:291 382:388	view
6	x 2	linux/rpmsg linux	byteorder.h virtio_byteorder.h	19:25 16:22	view
6	x 2	linux/rpmsg linux	byteorder.h virtio_byteorder.h	35:41 32:38	view
6	x 2	linux/rpmsg linux	byteorder.h virtio_byteorder.h	51:57 48:54	view
6	x 2	linux linux	regmap.h regmap.h	1641:1647 1670:1676	view
6	x 2	linux linux	acpi_dma.h acpi_dma.h	79:85 90:96	view
6	x 2	linux linux	clk-provider.h clk-provider.h	1444:1450 1451:1457	view
6	x 2	linux/regulator linux/regulator	consumer.h consumer.h	370:376 398:404	view
6	x 2	linux/phy linux/phy	phy.h phy.h	392:399 401:408	view
6	x 2	linux/mtd linux/mtd	nand-ecc-sw-bch.h nand-ecc-sw-hamming.h	54:60 79:85	view