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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */
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/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
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#ifndef DRIVER_ATM_ZATM_H
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#define DRIVER_ATM_ZATM_H
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#include <linux/skbuff.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/sonet.h>
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#include <linux/pci.h>
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#define DEV_LABEL "zatm"
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#define MAX_AAL5_PDU 10240 /* allocate for AAL5 PDUs of this size */
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#define MAX_RX_SIZE_LD 14 /* ceil(log2((MAX_AAL5_PDU+47)/48)) */
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#define LOW_MARK 12 /* start adding new buffers if less than 12 */
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#define HIGH_MARK 30 /* stop adding buffers after reaching 30 */
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#define OFF_CNG_THRES 5 /* threshold for offset changes */
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#define RX_SIZE 2 /* RX lookup entry size (in bytes) */
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#define NR_POOLS 32 /* number of free buffer pointers */
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#define POOL_SIZE 8 /* buffer entry size (in bytes) */
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#define NR_SHAPERS 16 /* number of shapers */
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#define SHAPER_SIZE 4 /* shaper entry size (in bytes) */
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#define VC_SIZE 32 /* VC dsc (TX or RX) size (in bytes) */
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#define RING_ENTRIES 32 /* ring entries (without back pointer) */
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#define RING_WORDS 4 /* ring element size */
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#define RING_SIZE (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS)
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#define NR_MBX 4 /* four mailboxes */
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#define MBX_RX_0 0 /* mailbox indices */
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#define MBX_RX_1 1
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#define MBX_TX_0 2
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#define MBX_TX_1 3
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struct zatm_vcc {
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/*-------------------------------- RX part */
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int rx_chan; /* RX channel, 0 if none */
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int pool; /* free buffer pool */
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/*-------------------------------- TX part */
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int tx_chan; /* TX channel, 0 if none */
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int shaper; /* shaper, <0 if none */
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struct sk_buff_head tx_queue; /* list of buffers in transit */
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wait_queue_head_t tx_wait; /* for close */
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u32 *ring; /* transmit ring */
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int ring_curr; /* current write position */
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int txing; /* number of transmits in progress */
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struct sk_buff_head backlog; /* list of buffers waiting for ring */
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};
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struct zatm_dev {
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/*-------------------------------- TX part */
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int tx_bw; /* remaining bandwidth */
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u32 free_shapers; /* bit set */
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int ubr; /* UBR shaper; -1 if none */
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int ubr_ref_cnt; /* number of VCs using UBR shaper */
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/*-------------------------------- RX part */
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int pool_ref[NR_POOLS]; /* free buffer pool usage counters */
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volatile struct sk_buff *last_free[NR_POOLS];
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/* last entry in respective pool */
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struct sk_buff_head pool[NR_POOLS];/* free buffer pools */
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struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */
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/*-------------------------------- maps */
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struct atm_vcc **tx_map; /* TX VCCs */
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struct atm_vcc **rx_map; /* RX VCCs */
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int chans; /* map size, must be 2^n */
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/*-------------------------------- mailboxes */
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unsigned long mbx_start[NR_MBX];/* start addresses */
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dma_addr_t mbx_dma[NR_MBX];
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u16 mbx_end[NR_MBX]; /* end offset (in bytes) */
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/*-------------------------------- other pointers */
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u32 pool_base; /* Free buffer pool dsc (word addr) */
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/*-------------------------------- ZATM links */
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struct atm_dev *more; /* other ZATM devices */
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/*-------------------------------- general information */
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int mem; /* RAM on board (in bytes) */
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int khz; /* timer clock */
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int copper; /* PHY type */
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unsigned char irq; /* IRQ */
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unsigned int base; /* IO base address */
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struct pci_dev *pci_dev; /* PCI stuff */
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spinlock_t lock;
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};
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#define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data)
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#define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data)
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struct zatm_skb_prv {
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struct atm_skb_data _; /* reserved */
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u32 *dsc; /* pointer to skb's descriptor */
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};
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#define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc)
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#endif
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