mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
b24413180f
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>
203 lines
4.7 KiB
C
203 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/arch/ia64/kernel/irq.c
|
|
*
|
|
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
|
|
*
|
|
* This file contains the code used by various IRQ handling routines:
|
|
* asking for different IRQs should be done through these routines
|
|
* instead of just grabbing them. Thus setups with different IRQ numbers
|
|
* shouldn't result in any weird surprises, and installing new handlers
|
|
* should be easier.
|
|
*
|
|
* Copyright (C) Ashok Raj<ashok.raj@intel.com>, Intel Corporation 2004
|
|
*
|
|
* 4/14/2004: Added code to handle cpu migration and do safe irq
|
|
* migration without losing interrupts for iosapic
|
|
* architecture.
|
|
*/
|
|
|
|
#include <asm/delay.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/module.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel_stat.h>
|
|
|
|
#include <asm/mca.h>
|
|
|
|
/*
|
|
* 'what should we do if we get a hw irq event on an illegal vector'.
|
|
* each architecture has to answer this themselves.
|
|
*/
|
|
void ack_bad_irq(unsigned int irq)
|
|
{
|
|
printk(KERN_ERR "Unexpected irq vector 0x%x on CPU %u!\n", irq, smp_processor_id());
|
|
}
|
|
|
|
#ifdef CONFIG_IA64_GENERIC
|
|
ia64_vector __ia64_irq_to_vector(int irq)
|
|
{
|
|
return irq_cfg[irq].vector;
|
|
}
|
|
|
|
unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
|
|
{
|
|
return __this_cpu_read(vector_irq[vec]);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Interrupt statistics:
|
|
*/
|
|
|
|
atomic_t irq_err_count;
|
|
|
|
/*
|
|
* /proc/interrupts printing:
|
|
*/
|
|
int arch_show_interrupts(struct seq_file *p, int prec)
|
|
{
|
|
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
static char irq_redir [NR_IRQS]; // = { [0 ... NR_IRQS-1] = 1 };
|
|
|
|
void set_irq_affinity_info (unsigned int irq, int hwid, int redir)
|
|
{
|
|
if (irq < NR_IRQS) {
|
|
cpumask_copy(irq_get_affinity_mask(irq),
|
|
cpumask_of(cpu_logical_id(hwid)));
|
|
irq_redir[irq] = (char) (redir & 0xff);
|
|
}
|
|
}
|
|
|
|
bool is_affinity_mask_valid(const struct cpumask *cpumask)
|
|
{
|
|
if (ia64_platform_is("sn2")) {
|
|
/* Only allow one CPU to be specified in the smp_affinity mask */
|
|
if (cpumask_weight(cpumask) != 1)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
int __init arch_early_irq_init(void)
|
|
{
|
|
ia64_mca_irq_init();
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
unsigned int vectors_in_migration[NR_IRQS];
|
|
|
|
/*
|
|
* Since cpu_online_mask is already updated, we just need to check for
|
|
* affinity that has zeros
|
|
*/
|
|
static void migrate_irqs(void)
|
|
{
|
|
int irq, new_cpu;
|
|
|
|
for (irq=0; irq < NR_IRQS; irq++) {
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
struct irq_data *data = irq_desc_get_irq_data(desc);
|
|
struct irq_chip *chip = irq_data_get_irq_chip(data);
|
|
|
|
if (irqd_irq_disabled(data))
|
|
continue;
|
|
|
|
/*
|
|
* No handling for now.
|
|
* TBD: Implement a disable function so we can now
|
|
* tell CPU not to respond to these local intr sources.
|
|
* such as ITV,CPEI,MCA etc.
|
|
*/
|
|
if (irqd_is_per_cpu(data))
|
|
continue;
|
|
|
|
if (cpumask_any_and(irq_data_get_affinity_mask(data),
|
|
cpu_online_mask) >= nr_cpu_ids) {
|
|
/*
|
|
* Save it for phase 2 processing
|
|
*/
|
|
vectors_in_migration[irq] = irq;
|
|
|
|
new_cpu = cpumask_any(cpu_online_mask);
|
|
|
|
/*
|
|
* Al three are essential, currently WARN_ON.. maybe panic?
|
|
*/
|
|
if (chip && chip->irq_disable &&
|
|
chip->irq_enable && chip->irq_set_affinity) {
|
|
chip->irq_disable(data);
|
|
chip->irq_set_affinity(data,
|
|
cpumask_of(new_cpu), false);
|
|
chip->irq_enable(data);
|
|
} else {
|
|
WARN_ON((!chip || !chip->irq_disable ||
|
|
!chip->irq_enable ||
|
|
!chip->irq_set_affinity));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void fixup_irqs(void)
|
|
{
|
|
unsigned int irq;
|
|
extern void ia64_process_pending_intr(void);
|
|
extern volatile int time_keeper_id;
|
|
|
|
/* Mask ITV to disable timer */
|
|
ia64_set_itv(1 << 16);
|
|
|
|
/*
|
|
* Find a new timesync master
|
|
*/
|
|
if (smp_processor_id() == time_keeper_id) {
|
|
time_keeper_id = cpumask_first(cpu_online_mask);
|
|
printk ("CPU %d is now promoted to time-keeper master\n", time_keeper_id);
|
|
}
|
|
|
|
/*
|
|
* Phase 1: Locate IRQs bound to this cpu and
|
|
* relocate them for cpu removal.
|
|
*/
|
|
migrate_irqs();
|
|
|
|
/*
|
|
* Phase 2: Perform interrupt processing for all entries reported in
|
|
* local APIC.
|
|
*/
|
|
ia64_process_pending_intr();
|
|
|
|
/*
|
|
* Phase 3: Now handle any interrupts not captured in local APIC.
|
|
* This is to account for cases that device interrupted during the time the
|
|
* rte was being disabled and re-programmed.
|
|
*/
|
|
for (irq=0; irq < NR_IRQS; irq++) {
|
|
if (vectors_in_migration[irq]) {
|
|
struct pt_regs *old_regs = set_irq_regs(NULL);
|
|
|
|
vectors_in_migration[irq]=0;
|
|
generic_handle_irq(irq);
|
|
set_irq_regs(old_regs);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now let processor die. We do irq disable and max_xtp() to
|
|
* ensure there is no more interrupts routed to this processor.
|
|
* But the local timer interrupt can have 1 pending which we
|
|
* take care in timer_interrupt().
|
|
*/
|
|
max_xtp();
|
|
local_irq_disable();
|
|
}
|
|
#endif
|