Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-01 08:31:37 +00:00
Code Issues Packages Projects Releases Wiki Activity
d9b9c0e027
linux/arch/frv/Kconfig
Greg Kroah-Hartman b24413180f 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>
2017-11-02 11:10:55 +01:00

387 lines
9.0 KiB
Plaintext
Raw Blame History

# SPDX-License-Identifier: GPL-2.0
config FRV
bool
default y
select HAVE_IDE
select HAVE_ARCH_TRACEHOOK
select HAVE_PERF_EVENTS
select HAVE_UID16
select VIRT_TO_BUS
select GENERIC_IRQ_SHOW
select HAVE_DEBUG_BUGVERBOSE
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CPU_DEVICES
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_WANT_IPC_PARSE_VERSION
select OLD_SIGSUSPEND3
select OLD_SIGACTION
select HAVE_DEBUG_STACKOVERFLOW
select ARCH_NO_COHERENT_DMA_MMAP
config CPU_BIG_ENDIAN
def_bool y
config ZONE_DMA
bool
default y
config RWSEM_GENERIC_SPINLOCK
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
config GENERIC_HWEIGHT
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default n
config TIME_LOW_RES
bool
default y
config QUICKLIST
bool
default y
config ARCH_HAS_ILOG2_U32
bool
default y
config ARCH_HAS_ILOG2_U64
bool
default y
config HZ
int
default 1000
source "init/Kconfig"
source "kernel/Kconfig.freezer"
menu "Fujitsu FR-V system setup"
config MMU
bool "MMU support"
help
This options switches on and off support for the FR-V MMU
(effectively switching between vmlinux and uClinux). Not all FR-V
CPUs support this. Currently only the FR451 has a sufficiently
featured MMU.
config FRV_OUTOFLINE_ATOMIC_OPS
bool "Out-of-line the FRV atomic operations"
default n
help
Setting this option causes the FR-V atomic operations to be mostly
implemented out-of-line.
See Documentation/frv/atomic-ops.txt for more information.
config HIGHMEM
bool "High memory support"
depends on MMU
default y
help
If you wish to use more than 256MB of memory with your MMU based
system, you will need to select this option. The kernel can only see
the memory between 0xC0000000 and 0xD0000000 directly... everything
else must be kmapped.
The arch is, however, capable of supporting up to 3GB of SDRAM.
config HIGHPTE
bool "Allocate page tables in highmem"
depends on HIGHMEM
default y
help
The VM uses one page of memory for each page table. For systems
with a lot of RAM, this can be wasteful of precious low memory.
Setting this option will put user-space page tables in high memory.
source "mm/Kconfig"
choice
prompt "uClinux kernel load address"
depends on !MMU
default UCPAGE_OFFSET_C0000000
help
This option sets the base address for the uClinux kernel. The kernel
will rearrange the SDRAM layout to start at this address, and move
itself to start there. It must be greater than 0, and it must be
sufficiently less than 0xE0000000 that the SDRAM does not intersect
the I/O region.
The base address must also be aligned such that the SDRAM controller
can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
config UCPAGE_OFFSET_20000000
bool "0x20000000"
config UCPAGE_OFFSET_40000000
bool "0x40000000"
config UCPAGE_OFFSET_60000000
bool "0x60000000"
config UCPAGE_OFFSET_80000000
bool "0x80000000"
config UCPAGE_OFFSET_A0000000
bool "0xA0000000"
config UCPAGE_OFFSET_C0000000
bool "0xC0000000 (Recommended)"
endchoice
config PAGE_OFFSET
hex
default 0x20000000 if UCPAGE_OFFSET_20000000
default 0x40000000 if UCPAGE_OFFSET_40000000
default 0x60000000 if UCPAGE_OFFSET_60000000
default 0x80000000 if UCPAGE_OFFSET_80000000
default 0xA0000000 if UCPAGE_OFFSET_A0000000
default 0xC0000000
config PROTECT_KERNEL
bool "Protect core kernel against userspace"
depends on !MMU
default y
help
Selecting this option causes the uClinux kernel to change the
permittivity of DAMPR register covering the core kernel image to
prevent userspace accessing the underlying memory directly.
choice
prompt "CPU Caching mode"
default FRV_DEFL_CACHE_WBACK
help
This option determines the default caching mode for the kernel.
Write-Back caching mode involves the all reads and writes causing
the affected cacheline to be read into the cache first before being
operated upon. Memory is not then updated by a write until the cache
is filled and a cacheline needs to be displaced from the cache to
make room. Only at that point is it written back.
Write-Behind caching is similar to Write-Back caching, except that a
write won't fetch a cacheline into the cache if there isn't already
one there; it will write directly to memory instead.
Write-Through caching only fetches cachelines from memory on a
read. Writes always get written directly to memory. If the affected
cacheline is also in cache, it will be updated too.
The final option is to turn of caching entirely.
Note that not all CPUs support Write-Behind caching. If the CPU on
which the kernel is running doesn't, it'll fall back to Write-Back
caching.
config FRV_DEFL_CACHE_WBACK
bool "Write-Back"
config FRV_DEFL_CACHE_WBEHIND
bool "Write-Behind"
config FRV_DEFL_CACHE_WTHRU
bool "Write-Through"
config FRV_DEFL_CACHE_DISABLED
bool "Disabled"
endchoice
menu "CPU core support"
config CPU_FR401
bool "Include FR401 core support"
depends on !MMU
default y
help
This enables support for the FR401, FR401A and FR403 CPUs
config CPU_FR405
bool "Include FR405 core support"
depends on !MMU
default y
help
This enables support for the FR405 CPU
config CPU_FR451
bool "Include FR451 core support"
default y
help
This enables support for the FR451 CPU
config CPU_FR451_COMPILE
bool "Specifically compile for FR451 core"
depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
default y
help
This causes appropriate flags to be passed to the compiler to
optimise for the FR451 CPU
config CPU_FR551
bool "Include FR551 core support"
depends on !MMU
default y
help
This enables support for the FR555 CPU
config CPU_FR551_COMPILE
bool "Specifically compile for FR551 core"
depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
default y
help
This causes appropriate flags to be passed to the compiler to
optimise for the FR555 CPU
config FRV_L1_CACHE_SHIFT
int
default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
default "6" if CPU_FR551
endmenu
choice
prompt "System support"
default MB93091_VDK
config MB93091_VDK
bool "MB93091 CPU board with or without motherboard"
config MB93093_PDK
bool "MB93093 PDK unit"
endchoice
if MB93091_VDK
choice
prompt "Motherboard support"
default MB93090_MB00
config MB93090_MB00
bool "Use the MB93090-MB00 motherboard"
help
Select this option if the MB93091 CPU board is going to be used with
a MB93090-MB00 VDK motherboard
config MB93091_NO_MB
bool "Use standalone"
help
Select this option if the MB93091 CPU board is going to be used
without a motherboard
endchoice
endif
config FUJITSU_MB93493
bool "MB93493 Multimedia chip"
help
Select this option if the MB93493 multimedia chip is going to be
used.
choice
prompt "GP-Relative data support"
default GPREL_DATA_8
help
This option controls what data, if any, should be placed in the GP
relative data sections. Using this means that the compiler can
generate accesses to the data using GR16-relative addressing which
is faster than absolute instructions and saves space (2 instructions
per access).
However, the GPREL region is limited in size because the immediate
value used in the load and store instructions is limited to a 12-bit
signed number.
So if the linker starts complaining that accesses to GPREL data are
out of range, try changing this option from the default.
Note that modules will always be compiled with this feature disabled
as the module data will not be in range of the GP base address.
config GPREL_DATA_8
bool "Put data objects of up to 8 bytes into GP-REL"
config GPREL_DATA_4
bool "Put data objects of up to 4 bytes into GP-REL"
config GPREL_DATA_NONE
bool "Don't use GP-REL"
endchoice
config FRV_ONCPU_SERIAL
bool "Use on-CPU serial ports"
select SERIAL_8250
default y
config PCI
bool "Use PCI"
depends on MB93090_MB00
default y
select GENERIC_PCI_IOMAP
help
Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
onboard. If you have one of these boards and you wish to use the PCI
facilities, say Y here.
config RESERVE_DMA_COHERENT
bool "Reserve DMA coherent memory"
depends on PCI && !MMU
default y
help
Many PCI drivers require access to uncached memory for DMA device
communications (such as is done with some Ethernet buffer rings). If
a fully featured MMU is available, this can be done through page
table settings, but if not, a region has to be set aside and marked
with a special DAMPR register.
Setting this option causes uClinux to set aside a portion of the
available memory for use in this manner. The memory will then be
unavailable for normal kernel use.
source "drivers/pci/Kconfig"
source "drivers/pcmcia/Kconfig"
menu "Power management options"
config ARCH_SUSPEND_POSSIBLE
def_bool y
source kernel/power/Kconfig
endmenu
endmenu
menu "Executable formats"
source "fs/Kconfig.binfmt"
endmenu
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/frv/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
Reference in New Issue View Git Blame Copy Permalink