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linux_dsm_epyc7002/include/asm-generic/percpu.h
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

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_PERCPU_H_
#define _ASM_GENERIC_PERCPU_H_
#include <linux/compiler.h>
#include <linux/threads.h>
#include <linux/percpu-defs.h>
#ifdef CONFIG_SMP
/*
* per_cpu_offset() is the offset that has to be added to a
* percpu variable to get to the instance for a certain processor.
*
* Most arches use the __per_cpu_offset array for those offsets but
* some arches have their own ways of determining the offset (x86_64, s390).
*/
#ifndef __per_cpu_offset
extern unsigned long __per_cpu_offset[NR_CPUS];
#define per_cpu_offset(x) (__per_cpu_offset[x])
#endif
/*
* Determine the offset for the currently active processor.
* An arch may define __my_cpu_offset to provide a more effective
* means of obtaining the offset to the per cpu variables of the
* current processor.
*/
#ifndef __my_cpu_offset
#define __my_cpu_offset per_cpu_offset(raw_smp_processor_id())
#endif
#ifdef CONFIG_DEBUG_PREEMPT
#define my_cpu_offset per_cpu_offset(smp_processor_id())
#else
#define my_cpu_offset __my_cpu_offset
#endif
/*
* Arch may define arch_raw_cpu_ptr() to provide more efficient address
* translations for raw_cpu_ptr().
*/
#ifndef arch_raw_cpu_ptr
#define arch_raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
#endif
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
extern void setup_per_cpu_areas(void);
#endif
#endif /* SMP */
#ifndef PER_CPU_BASE_SECTION
#ifdef CONFIG_SMP
#define PER_CPU_BASE_SECTION ".data..percpu"
#else
#define PER_CPU_BASE_SECTION ".data"
#endif
#endif
#ifndef PER_CPU_ATTRIBUTES
#define PER_CPU_ATTRIBUTES
#endif
#ifndef PER_CPU_DEF_ATTRIBUTES
#define PER_CPU_DEF_ATTRIBUTES
#endif
#define raw_cpu_generic_read(pcp) \
({ \
*raw_cpu_ptr(&(pcp)); \
})
#define raw_cpu_generic_to_op(pcp, val, op) \
do { \
*raw_cpu_ptr(&(pcp)) op val; \
} while (0)
#define raw_cpu_generic_add_return(pcp, val) \
({ \
typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
\
*__p += val; \
*__p; \
})
#define raw_cpu_generic_xchg(pcp, nval) \
({ \
typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
typeof(pcp) __ret; \
__ret = *__p; \
*__p = nval; \
__ret; \
})
#define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
typeof(pcp) __ret; \
__ret = *__p; \
if (__ret == (oval)) \
*__p = nval; \
__ret; \
})
#define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
({ \
typeof(&(pcp1)) __p1 = raw_cpu_ptr(&(pcp1)); \
typeof(&(pcp2)) __p2 = raw_cpu_ptr(&(pcp2)); \
int __ret = 0; \
if (*__p1 == (oval1) && *__p2 == (oval2)) { \
*__p1 = nval1; \
*__p2 = nval2; \
__ret = 1; \
} \
(__ret); \
})
#define __this_cpu_generic_read_nopreempt(pcp) \
({ \
typeof(pcp) __ret; \
preempt_disable_notrace(); \
__ret = READ_ONCE(*raw_cpu_ptr(&(pcp))); \
preempt_enable_notrace(); \
__ret; \
})
#define __this_cpu_generic_read_noirq(pcp) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_read(pcp); \
raw_local_irq_restore(__flags); \
__ret; \
})
#define this_cpu_generic_read(pcp) \
({ \
typeof(pcp) __ret; \
if (__native_word(pcp)) \
__ret = __this_cpu_generic_read_nopreempt(pcp); \
else \
__ret = __this_cpu_generic_read_noirq(pcp); \
__ret; \
})
#define this_cpu_generic_to_op(pcp, val, op) \
do { \
unsigned long __flags; \
raw_local_irq_save(__flags); \
raw_cpu_generic_to_op(pcp, val, op); \
raw_local_irq_restore(__flags); \
} while (0)
#define this_cpu_generic_add_return(pcp, val) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_add_return(pcp, val); \
raw_local_irq_restore(__flags); \
__ret; \
})
#define this_cpu_generic_xchg(pcp, nval) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_xchg(pcp, nval); \
raw_local_irq_restore(__flags); \
__ret; \
})
#define this_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \
raw_local_irq_restore(__flags); \
__ret; \
})
#define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
({ \
int __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \
oval1, oval2, nval1, nval2); \
raw_local_irq_restore(__flags); \
__ret; \
})
#ifndef raw_cpu_read_1
#define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_2
#define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_4
#define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_8
#define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_write_1
#define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef raw_cpu_write_2
#define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef raw_cpu_write_4
#define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef raw_cpu_write_8
#define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef raw_cpu_add_1
#define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef raw_cpu_add_2
#define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef raw_cpu_add_4
#define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef raw_cpu_add_8
#define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef raw_cpu_and_1
#define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef raw_cpu_and_2
#define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef raw_cpu_and_4
#define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef raw_cpu_and_8
#define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef raw_cpu_or_1
#define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef raw_cpu_or_2
#define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef raw_cpu_or_4
#define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef raw_cpu_or_8
#define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef raw_cpu_add_return_1
#define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val)
#endif
#ifndef raw_cpu_add_return_2
#define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val)
#endif
#ifndef raw_cpu_add_return_4
#define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val)
#endif
#ifndef raw_cpu_add_return_8
#define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val)
#endif
#ifndef raw_cpu_xchg_1
#define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
#endif
#ifndef raw_cpu_xchg_2
#define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
#endif
#ifndef raw_cpu_xchg_4
#define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
#endif
#ifndef raw_cpu_xchg_8
#define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
#endif
#ifndef raw_cpu_cmpxchg_1
#define raw_cpu_cmpxchg_1(pcp, oval, nval) \
raw_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef raw_cpu_cmpxchg_2
#define raw_cpu_cmpxchg_2(pcp, oval, nval) \
raw_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef raw_cpu_cmpxchg_4
#define raw_cpu_cmpxchg_4(pcp, oval, nval) \
raw_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef raw_cpu_cmpxchg_8
#define raw_cpu_cmpxchg_8(pcp, oval, nval) \
raw_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef raw_cpu_cmpxchg_double_1
#define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef raw_cpu_cmpxchg_double_2
#define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef raw_cpu_cmpxchg_double_4
#define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef raw_cpu_cmpxchg_double_8
#define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef this_cpu_read_1
#define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
#endif
#ifndef this_cpu_read_2
#define this_cpu_read_2(pcp) this_cpu_generic_read(pcp)
#endif
#ifndef this_cpu_read_4
#define this_cpu_read_4(pcp) this_cpu_generic_read(pcp)
#endif
#ifndef this_cpu_read_8
#define this_cpu_read_8(pcp) this_cpu_generic_read(pcp)
#endif
#ifndef this_cpu_write_1
#define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef this_cpu_write_2
#define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef this_cpu_write_4
#define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef this_cpu_write_8
#define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =)
#endif
#ifndef this_cpu_add_1
#define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef this_cpu_add_2
#define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef this_cpu_add_4
#define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef this_cpu_add_8
#define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
#endif
#ifndef this_cpu_and_1
#define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef this_cpu_and_2
#define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef this_cpu_and_4
#define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef this_cpu_and_8
#define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
#endif
#ifndef this_cpu_or_1
#define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef this_cpu_or_2
#define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef this_cpu_or_4
#define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef this_cpu_or_8
#define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
#endif
#ifndef this_cpu_add_return_1
#define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val)
#endif
#ifndef this_cpu_add_return_2
#define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val)
#endif
#ifndef this_cpu_add_return_4
#define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val)
#endif
#ifndef this_cpu_add_return_8
#define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val)
#endif
#ifndef this_cpu_xchg_1
#define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval)
#endif
#ifndef this_cpu_xchg_2
#define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval)
#endif
#ifndef this_cpu_xchg_4
#define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval)
#endif
#ifndef this_cpu_xchg_8
#define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval)
#endif
#ifndef this_cpu_cmpxchg_1
#define this_cpu_cmpxchg_1(pcp, oval, nval) \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef this_cpu_cmpxchg_2
#define this_cpu_cmpxchg_2(pcp, oval, nval) \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef this_cpu_cmpxchg_4
#define this_cpu_cmpxchg_4(pcp, oval, nval) \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef this_cpu_cmpxchg_8
#define this_cpu_cmpxchg_8(pcp, oval, nval) \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
#ifndef this_cpu_cmpxchg_double_1
#define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef this_cpu_cmpxchg_double_2
#define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef this_cpu_cmpxchg_double_4
#define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#ifndef this_cpu_cmpxchg_double_8
#define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
#endif
#endif /* _ASM_GENERIC_PERCPU_H_ */
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