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License cleanup: add SPDX GPL-2.0 license identifier to files with no license 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>
2017-11-01 22:07:57 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
h8300: Low level entry Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2015-05-11 01:32:13 +08:00
/*
*
* linux/arch/h8300/kernel/entry.S
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
* David McCullough <davidm@snapgear.com>
*
*/
/*
* entry.S
* include exception/interrupt gateway
* system call entry
*/
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/errno.h>
#if defined(CONFIG_CPU_H8300H)
#define USERRET 8
INTERRUPTS = 64
.h8300h
.macro SHLL2 reg
shll.l \reg
shll.l \reg
.endm
.macro SHLR2 reg
shlr.l \reg
shlr.l \reg
.endm
.macro SAVEREGS
mov.l er0,@-sp
mov.l er1,@-sp
mov.l er2,@-sp
mov.l er3,@-sp
.endm
.macro RESTOREREGS
mov.l @sp+,er3
mov.l @sp+,er2
.endm
.macro SAVEEXR
.endm
.macro RESTOREEXR
.endm
#endif
#if defined(CONFIG_CPU_H8S)
#define USERRET 10
#define USEREXR 8
INTERRUPTS = 128
.h8300s
.macro SHLL2 reg
shll.l #2,\reg
.endm
.macro SHLR2 reg
shlr.l #2,\reg
.endm
.macro SAVEREGS
stm.l er0-er3,@-sp
.endm
.macro RESTOREREGS
ldm.l @sp+,er2-er3
.endm
.macro SAVEEXR
mov.w @(USEREXR:16,er0),r1
mov.w r1,@(LEXR-LER3:16,sp) /* copy EXR */
.endm
.macro RESTOREEXR
mov.w @(LEXR-LER1:16,sp),r1 /* restore EXR */
mov.b r1l,r1h
mov.w r1,@(USEREXR:16,er0)
.endm
#endif
/* CPU context save/restore macros. */
.macro SAVE_ALL
mov.l er0,@-sp
stc ccr,r0l /* check kernel mode */
btst #4,r0l
bne 5f
/* user mode */
mov.l sp,@_sw_usp
mov.l @sp,er0 /* restore saved er0 */
orc #0x10,ccr /* switch kernel stack */
mov.l @_sw_ksp,sp
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
SAVEREGS
mov.l @_sw_usp,er0
mov.l @(USERRET:16,er0),er1 /* copy the RET addr */
mov.l er1,@(LRET-LER3:16,sp)
SAVEEXR
mov.l @(LORIG-LER3:16,sp),er0
mov.l er0,@(LER0-LER3:16,sp) /* copy ER0 */
mov.w e1,r1 /* e1 highbyte = ccr */
and #0xef,r1h /* mask mode? flag */
bra 6f
5:
/* kernel mode */
mov.l @sp,er0 /* restore saved er0 */
subs #2,sp /* set dummy ccr */
subs #4,sp /* set dummp sp */
SAVEREGS
mov.w @(LRET-LER3:16,sp),r1 /* copy old ccr */
6:
mov.b r1h,r1l
mov.b #0,r1h
mov.w r1,@(LCCR-LER3:16,sp) /* set ccr */
mov.l @_sw_usp,er2
mov.l er2,@(LSP-LER3:16,sp) /* set usp */
mov.l er6,@-sp /* syscall arg #6 */
mov.l er5,@-sp /* syscall arg #5 */
mov.l er4,@-sp /* syscall arg #4 */
.endm /* r1 = ccr */
.macro RESTORE_ALL
mov.l @sp+,er4
mov.l @sp+,er5
mov.l @sp+,er6
RESTOREREGS
mov.w @(LCCR-LER1:16,sp),r0 /* check kernel mode */
btst #4,r0l
bne 7f
orc #0xc0,ccr
mov.l @(LSP-LER1:16,sp),er0
mov.l @(LER0-LER1:16,sp),er1 /* restore ER0 */
mov.l er1,@er0
RESTOREEXR
mov.w @(LCCR-LER1:16,sp),r1 /* restore the RET addr */
mov.b r1l,r1h
mov.b @(LRET+1-LER1:16,sp),r1l
mov.w r1,e1
mov.w @(LRET+2-LER1:16,sp),r1
mov.l er1,@(USERRET:16,er0)
mov.l @sp+,er1
add.l #(LRET-LER1),sp /* remove LORIG - LRET */
mov.l sp,@_sw_ksp
andc #0xef,ccr /* switch to user mode */
mov.l er0,sp
bra 8f
7:
mov.l @sp+,er1
add.l #10,sp
8:
mov.l @sp+,er0
adds #4,sp /* remove the sw created LVEC */
rte
.endm
.globl _system_call
.globl ret_from_exception
.globl ret_from_fork
.globl ret_from_kernel_thread
.globl ret_from_interrupt
.globl _interrupt_redirect_table
.globl _sw_ksp,_sw_usp
.globl _resume
.globl _interrupt_entry
.globl _trace_break
.globl _nmi
#if defined(CONFIG_ROMKERNEL)
.section .int_redirect,"ax"
_interrupt_redirect_table:
#if defined(CONFIG_CPU_H8300H)
.rept 7
.long 0
.endr
#endif
#if defined(CONFIG_CPU_H8S)
.rept 5
.long 0
.endr
jmp @_trace_break
.long 0
#endif
jsr @_interrupt_entry /* NMI */
jmp @_system_call /* TRAPA #0 (System call) */
.long 0
h8300: Add KGDB support. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2016-01-20 22:27:30 +08:00
#if defined(CONFIG_KGDB)
jmp @_kgdb_trap
#else
h8300: Low level entry Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2015-05-11 01:32:13 +08:00
.long 0
h8300: Add KGDB support. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2016-01-20 22:27:30 +08:00
#endif
h8300: Low level entry Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2015-05-11 01:32:13 +08:00
jmp @_trace_break /* TRAPA #3 (breakpoint) */
.rept INTERRUPTS-12
jsr @_interrupt_entry
.endr
#endif
#if defined(CONFIG_RAMKERNEL)
.globl _interrupt_redirect_table
.section .bss
_interrupt_redirect_table:
.space 4
#endif
.section .text
.align 2
_interrupt_entry:
SAVE_ALL
/* r1l is saved ccr */
mov.l sp,er0
add.l #LVEC,er0
btst #4,r1l
bne 1f
/* user LVEC */
mov.l @_sw_usp,er0
adds #4,er0
1:
mov.l @er0,er0 /* LVEC address */
#if defined(CONFIG_ROMKERNEL)
sub.l #_interrupt_redirect_table,er0
#endif
#if defined(CONFIG_RAMKERNEL)
mov.l @_interrupt_redirect_table,er1
sub.l er1,er0
#endif
SHLR2 er0
dec.l #1,er0
mov.l sp,er1
subs #4,er1 /* adjust ret_pc */
#if defined(CONFIG_CPU_H8S)
orc #7,exr
#endif
jsr @do_IRQ
jmp @ret_from_interrupt
_system_call:
subs #4,sp /* dummy LVEC */
SAVE_ALL
/* er0: syscall nr */
andc #0xbf,ccr
mov.l er0,er4
/* save top of frame */
mov.l sp,er0
jsr @set_esp0
h8300: System call entry enable interrupt. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2016-01-15 22:51:51 +08:00
andc #0x3f,ccr
h8300: Low level entry Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2015-05-11 01:32:13 +08:00
mov.l sp,er2
and.w #0xe000,r2
mov.l @(TI_FLAGS:16,er2),er2
and.w #_TIF_WORK_SYSCALL_MASK,r2
beq 1f
mov.l sp,er0
jsr @do_syscall_trace_enter
1:
cmp.l #__NR_syscalls,er4
bcc badsys
SHLL2 er4
mov.l #_sys_call_table,er0
add.l er4,er0
mov.l @er0,er4
beq ret_from_exception:16
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
mov.l sp,er2
and.w #0xe000,r2
mov.l @(TI_FLAGS:16,er2),er2
and.w #_TIF_WORK_SYSCALL_MASK,r2
beq 2f
mov.l sp,er0
jsr @do_syscall_trace_leave
2:
orc #0xc0,ccr
bra resume_userspace
badsys:
mov.l #-ENOSYS,er0
mov.l er0,@(LER0:16,sp)
bra resume_userspace
#if !defined(CONFIG_PREEMPT)
#define resume_kernel restore_all
#endif
ret_from_exception:
#if defined(CONFIG_PREEMPT)
orc #0xc0,ccr
#endif
ret_from_interrupt:
mov.b @(LCCR+1:16,sp),r0l
btst #4,r0l
bne resume_kernel:16 /* return from kernel */
resume_userspace:
andc #0xbf,ccr
mov.l sp,er4
and.w #0xe000,r4 /* er4 <- current thread info */
mov.l @(TI_FLAGS:16,er4),er1
and.l #_TIF_WORK_MASK,er1
beq restore_all:8
work_pending:
btst #TIF_NEED_RESCHED,r1l
bne work_resched:8
/* work notifysig */
mov.l sp,er0
subs #4,er0 /* er0: pt_regs */
jsr @do_notify_resume
bra resume_userspace:8
work_resched:
mov.l sp,er0
jsr @set_esp0
jsr @schedule
bra resume_userspace:8
restore_all:
RESTORE_ALL /* Does RTE */
#if defined(CONFIG_PREEMPT)
resume_kernel:
mov.l @(TI_PRE_COUNT:16,er4),er0
bne restore_all:8
need_resched:
mov.l @(TI_FLAGS:16,er4),er0
btst #TIF_NEED_RESCHED,r0l
beq restore_all:8
mov.b @(LCCR+1:16,sp),r0l /* Interrupt Enabled? */
bmi restore_all:8
mov.l sp,er0
jsr @set_esp0
jsr @preempt_schedule_irq
bra need_resched:8
#endif
ret_from_fork:
mov.l er2,er0
jsr @schedule_tail
jmp @ret_from_exception
ret_from_kernel_thread:
mov.l er2,er0
jsr @schedule_tail
mov.l @(LER4:16,sp),er0
mov.l @(LER5:16,sp),er1
jsr @er1
jmp @ret_from_exception
_resume:
/*
* Beware - when entering resume, offset of tss is in d1,
* prev (the current task) is in a0, next (the new task)
* is in a1 and d2.b is non-zero if the mm structure is
* shared between the tasks, so don't change these
* registers until their contents are no longer needed.
*/
/* save sr */
sub.w r3,r3
stc ccr,r3l
mov.w r3,@(THREAD_CCR+2:16,er0)
/* disable interrupts */
orc #0xc0,ccr
mov.l @_sw_usp,er3
mov.l er3,@(THREAD_USP:16,er0)
mov.l sp,@(THREAD_KSP:16,er0)
/* Skip address space switching if they are the same. */
/* FIXME: what did we hack out of here, this does nothing! */
mov.l @(THREAD_USP:16,er1),er0
mov.l er0,@_sw_usp
mov.l @(THREAD_KSP:16,er1),sp
/* restore status register */
mov.w @(THREAD_CCR+2:16,er1),r3
ldc r3l,ccr
rts
_trace_break:
subs #4,sp
SAVE_ALL
sub.l er1,er1
dec.l #1,er1
mov.l er1,@(LORIG,sp)
mov.l sp,er0
jsr @set_esp0
mov.l @_sw_usp,er0
mov.l @er0,er1
mov.w @(-2:16,er1),r2
cmp.w #0x5730,r2
beq 1f
subs #2,er1
mov.l er1,@er0
1:
and.w #0xff,e1
mov.l er1,er0
jsr @trace_trap
jmp @ret_from_exception
_nmi:
subs #4, sp
mov.l er0, @-sp
mov.l @_interrupt_redirect_table, er0
add.l #8*4, er0
mov.l er0, @(4,sp)
mov.l @sp+, er0
jmp @_interrupt_entry
h8300: Add KGDB support. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2016-01-20 22:27:30 +08:00
#if defined(CONFIG_KGDB)
_kgdb_trap:
subs #4,sp
SAVE_ALL
mov.l sp,er0
add.l #LRET,er0
mov.l er0,@(LSP,sp)
jsr @set_esp0
mov.l sp,er0
subs #4,er0
jsr @h8300_kgdb_trap
jmp @ret_from_exception
#endif
h8300: Low level entry Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
2015-05-11 01:32:13 +08:00
.section .bss
_sw_ksp:
.space 4
_sw_usp:
.space 4
.end