parisc: perf: use named initializers for struct miscdevice

Though struct miscdevice has hardly changed over the years, this is good
practice and also makes the core more readable.

Signed-off-by: Th

parisc: perf: use named initializers for struct miscdevice

Though struct miscdevice has hardly changed over the years, this is good
practice and also makes the core more readable.

Signed-off-by: Thadeu Lima de Souza Cascardo <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

show more ...

[tree-wide] finally take no_llseek out

no_llseek had been defined to NULL two years ago, in commit 868941b14441
("fs: remove no_llseek")

To quote that commit,

At -rc1 we'll need do a mechanical

[tree-wide] finally take no_llseek out

no_llseek had been defined to NULL two years ago, in commit 868941b14441
("fs: remove no_llseek")

To quote that commit,

At -rc1 we'll need do a mechanical removal of no_llseek -

git grep -l -w no_llseek | grep -v porting.rst | while read i; do
sed -i '/\<no_llseek\>/d' $i
done

would do it.

Unfortunately, that hadn't been done. Linus, could you do that now, so
that we could finally put that thing to rest? All instances are of the
form
.llseek = no_llseek,
so it's obviously safe.

Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

parisc: perf: Make cpu_device variable static

Signed-off-by: Helge Deller <[email protected]>

parisc: Mark image_size __maybe_unused in perf_write()

Signed-off-by: Helge Deller <[email protected]>

parisc/perf: open access for CAP_PERFMON privileged process

Open access to monitoring for CAP_PERFMON privileged process. Providing
the access under CAP_PERFMON capability singly, without the rest

parisc/perf: open access for CAP_PERFMON privileged process

Open access to monitoring for CAP_PERFMON privileged process. Providing
the access under CAP_PERFMON capability singly, without the rest of
CAP_SYS_ADMIN credentials, excludes chances to misuse the credentials
and makes operation more secure.

CAP_PERFMON implements the principle of least privilege for performance
monitoring and observability operations (POSIX IEEE 1003.1e 2.2.2.39
principle of least privilege: A security design principle that states
that a process or program be granted only those privileges (e.g.,
capabilities) necessary to accomplish its legitimate function, and only
for the time that such privileges are actually required)

For backward compatibility reasons access to the monitoring remains open
for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for
secure monitoring is discouraged with respect to CAP_PERFMON capability.

Signed-off-by: Alexey Budankov <[email protected]>
Reviewed-by: James Morris <[email protected]>
Acked-by: Helge Deller <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Igor Lubashev <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Serge Hallyn <[email protected]>
Cc: Song Liu <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

remove ioremap_nocache and devm_ioremap_nocache

ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.

Signed-off-by: Chr

remove ioremap_nocache and devm_ioremap_nocache

ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.

Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>

show more ...

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 or at your option any
later version this program is distributed in the hope that it will
be useful but without any warranty without even the implied warranty
of merchantability or fitness for a particular purpose see the gnu
general public license for more details you should have received a
copy of the gnu general public license along with this program if
not write to the free software foundation inc 675 mass ave cambridge
ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 77 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Armijn Hemel <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

parisc: Static initialization of spinlocks in perf and unwind code

While testing UBSAN I saw this BUG:
BUG: spinlock bad magic on CPU#0, swapper/0
in unwind code. Let's avoid that by static initial

parisc: Static initialization of spinlocks in perf and unwind code

While testing UBSAN I saw this BUG:
BUG: spinlock bad magic on CPU#0, swapper/0
in unwind code. Let's avoid that by static initialization.

Signed-off-by: Helge Deller <[email protected]>

show more ...

parisc: perf: Fix potential NULL pointer dereference

Fix potential NULL pointer dereference and clean up
coding style errors (code indent, trailing whitespaces).

Signed-off-by: Arvind Yadav <arvind

parisc: perf: Fix potential NULL pointer dereference

Fix potential NULL pointer dereference and clean up
coding style errors (code indent, trailing whitespaces).

Signed-off-by: Arvind Yadav <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

show more ...

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

This was entirely automated, using the script by Al:

PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PA

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

This was entirely automated, using the script by Al:

PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)

to do the replacement at the end of the merge window.

Requested-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

parisc: perf: return -EFAULT on error

The copy_from_user() returns the number of bytes remaining to be copied
but we want to return -EFAULT if it's non-zero.

Signed-off-by: Dan Carpenter <dan.carpe

parisc: perf: return -EFAULT on error

The copy_from_user() returns the number of bytes remaining to be copied
but we want to return -EFAULT if it's non-zero.

Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

show more ...

parisc64: don't use module_init for non-modular core perf code

The perf.c code depends on CONFIG_64BIT, so it is either built-in
or absent. It will never be modular, so using module_init as an
alia

parisc64: don't use module_init for non-modular core perf code

The perf.c code depends on CONFIG_64BIT, so it is either built-in
or absent. It will never be modular, so using module_init as an
alias for __initcall is rather misleading.

Fix this up now, so that we can relocate module_init from
init.h into module.h in the future. If we don't do this, we'd
have to add module.h to obviously non-modular code, and that
would be a worse thing. Aside from it not making sense, it also
causes a ~10% increase in CPP overhead due to module.h having a
large list of headers itself -- for example compare line counts:

device_initcall() and <linux/init.h>
20238 arch/parisc/kernel/perf.i

module_init() and <linux/module.h>
22194 arch/parisc/kernel/perf.i

Direct use of __initcall is discouraged, vs prioritized ones.
Use of device_initcall is consistent with what __initcall
maps onto, and hence does not change the init order, making the
impact of this change zero. Should someone with real hardware
for boot testing want to change it later to arch_initcall or
something different, they can do that at a later date.

Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected]
Signed-off-by: Paul Gortmaker <[email protected]>

show more ...

parisc: remove big kernel lock

The parisc version of the perf code is sufficiently
protected by its own spinlock, no need to use the BKL.

Signed-off-by: Arnd Bergmann <[email protected]>
Cc: Kyle McMar

parisc: remove big kernel lock

The parisc version of the perf code is sufficiently
protected by its own spinlock, no need to use the BKL.

Signed-off-by: Arnd Bergmann <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: [email protected]

show more ...

tree-wide: fix a very frequent spelling mistake

something-bility is spelled as something-blity
so a grep for 'blit' would find these lines

this is so trivial that I didn't split it by subsystem / c

tree-wide: fix a very frequent spelling mistake

something-bility is spelled as something-blity
so a grep for 'blit' would find these lines

this is so trivial that I didn't split it by subsystem / copy
additional maintainers - all changes are to comments
The only purpose is to get fewer false positives when grepping
around the kernel sources.

Signed-off-by: Dirk Hohndel <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

show more ...

parisc: Replace NR_CPUS in parisc code

parisc: Replace most arrays sized by NR_CPUS with percpu variables.

Signed-off-by: Helge Deller <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

parisc-kernel-perf: BKL pushdown

Signed-off-by: Arnd Bergmann <[email protected]>

[PARISC] spelling fixes: arch/parisc/

Spelling fixes in arch/parisc/.

Signed-off-by: Simon Arlott <[email protected]>
Acked-by: Grant Grundler <[email protected]>
Signed-off-by: Kyle McMart

[PARISC] spelling fixes: arch/parisc/

Spelling fixes in arch/parisc/.

Signed-off-by: Simon Arlott <[email protected]>
Acked-by: Grant Grundler <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...

[PARISC] Let PA-8900 processors boot

Signed-off-by: Kyle McMartin <[email protected]>

[PATCH] mark struct file_operations const 2

Many struct file_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potentia

[PATCH] mark struct file_operations const 2

Many struct file_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data. In addition it'll catch accidental writes at compile time to
these shared resources.

[[email protected]: sparc64 fix]
Signed-off-by: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

[PARISC] I/O-Space must be ioremap_nocache()'d

Addresses in F-space must be accessed uncached on most parisc machines.

Signed-off-by: Helge Deller <[email protected]>
Signed-off-by: Kyle McMa

[PARISC] I/O-Space must be ioremap_nocache()'d

Addresses in F-space must be accessed uncached on most parisc machines.

Signed-off-by: Helge Deller <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...

[PARISC] Remove {,un}lock_kernel from perf ioctl

Remove the lock_kernel/unlock_kernel pair in the ioctl method. It
plainly wasn't protecting anything.

Signed-off-by: Matthew Wilcox <willy@parisc-li

[PARISC] Remove {,un}lock_kernel from perf ioctl

Remove the lock_kernel/unlock_kernel pair in the ioctl method. It
plainly wasn't protecting anything.

Signed-off-by: Matthew Wilcox <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...

[PARISC] Use kzalloc and other janitor-style cleanups

Helge,
o Convert a bunch of kmalloc/memset uses to kzalloc.
o pci.c: Add some __read_mostly annotations.
o pci.c: Move constant pci_post_r

[PARISC] Use kzalloc and other janitor-style cleanups

Helge,
o Convert a bunch of kmalloc/memset uses to kzalloc.
o pci.c: Add some __read_mostly annotations.
o pci.c: Move constant pci_post_reset_delay to asm/pci.h
o grfioctl.h: Add A4450A to comment of CRT_ID_VISUALIZE_EG.
o Add some consts to perf.c/perf_images.h

Matthew,
o sticore.c: Add some consts to suppress compile warnings.

Signed-off-by: Helge Deller <[email protected]>
Signed-off-by: Matthew Wilcox <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...

[PATCH] capable/capability.h (arch/)

arch: Use <linux/capability.h> where capable() is used.

Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-o

[PATCH] capable/capability.h (arch/)

arch: Use <linux/capability.h> where capable() is used.

Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

[PARISC] Add __read_mostly section for parisc

Flag a whole bunch of things as __read_mostly on parisc. Also flag a few
branches as unlikely() and cleanup a bit of code.

Signed-off-by: Helge Deller

[PARISC] Add __read_mostly section for parisc

Flag a whole bunch of things as __read_mostly on parisc. Also flag a few
branches as unlikely() and cleanup a bit of code.

Signed-off-by: Helge Deller <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...

[PARISC] move PA perf driver over to ->compat_ioctl

Move PA perf driver over to ->compat_ioctl.

Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Randolph Chung <[email protected]>
Signe

[PARISC] move PA perf driver over to ->compat_ioctl

Move PA perf driver over to ->compat_ioctl.

Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Randolph Chung <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

show more ...