Some functions like kmalloc/kzalloc return NULL on failure.
When NULL represents failure, !x is commonly used.

This was done using Coccinelle:
@@
expression *e;
identifier l1;
@@

e = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\)(...);
...
- e == NULL
+ !e
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fixed the following checkpath.pl issue:
CHECK: alignment should match open paranthesis.

Deleted a tab and added spaces to align open paranthesis.
Signed-off-by: Tamara Diaconita <diaconita.tamara@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fixed indentation to use tabs and aligned all the fields to same level.
Signed-off-by: Tuomo Rinne <tuomo.rinne@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Using __printf allows the compiler to verify formats and arguments.
Use it and fix the single misuse found.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Indentation should always use tabs and never spaces.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Members of nbu2ss_udc structure can change device state, maintain
completion state and control driver. Also provide access to read and
write to register. Hence, exclusive access to nbu2ss_udc is required.
The lock variable of type spinlock_t guarantees the exclusive access
and protects it.

In this patch, comment is added for spinlock_t definition, to fix the
following checkpatch issue:

CHECK: spinlock_t definition without comment
Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

New variable is added to make the code more readable.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Declare ieee80211_qos_parameters structure constant it is only passed
as src parameter to the function memcpy. The fields of
def_qos_parameters structure are never modified and hence it can be
declared as const.

Coccinelle Script:

@r1 disable optional_qualifier@
identifier i;
position p;
@@

static struct ieee80211_qos_parameters i@p ={...};

@ok1@
identifier r1.i;
position p;
expression e1,e2;
@@
memcpy(e1,&i@p,e2)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct ieee80211_qos_parameters i={...};
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The `device_ids[]` passed to `MODULE_DEVICE_TABLE()` should be `const`.
When the "ni_atmio" driver is built-in, gcc warns about `device_ids`
being defined but ununsed.  Make it `const`.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

There is no particular reason why comedi has to be built as kernel
modules.  Remove the `depends on m` from the Kconfig file to allow it to
be built-in.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Change to unsigned to allow removal of negative value check in
init section. Use smaller data type since the max possible
value currently is 48.
Signed-off-by: Cheah Kok Cheong <thrust73@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Comment contains misspelled work 'Adress'.

Correct spelling: Adress -> Address
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits WARNING: Comparisons should place the constant on the
right side of the test.

Move comparison constant to the right side of the test.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits various warnings/errors pointing to misplaced
spaces.

- trailing whitespace
- please, no spaces at the start of a line
- please, no space before tabs
- Unnecessary space before function pointer arguments
- unnecessary whitespace before a quoted newline
- code indent should use tabs where possible

Remove all undesirable whitespace.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Split lines to have less than 80 characters.

Fix the checkpatch.pl warning:
WARNING: line over 80 characters.
Signed-off-by: Tamara Diaconita <diaconita.tamara@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Unnecessary parentheses are removed as reported by checkpatch.pl
to make coder nicer and to improve readability.
Also coding style is improved as it's often nicer to read if
 &(foo[0]) is converted to foo like:
 memcpy(&(ap->bssid[0]), &(ap_info->bssid[0]), ETH_ALEN);
 memcpy(ap->bssid, ap_info->bssid, ETH_ALEN);
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Lowmemory killer is sitting in the staging tree since 2008 without any
serious interest for fixing issues brought up by the MM folks. The main
objection is that the implementation is basically broken by design:
	- it hooks into slab shrinker API which is not suitable for this
	  purpose. lowmem_count implementation just shows this nicely.
	  There is no scaling based on the memory pressure and no
	  feedback to the generic shrinker infrastructure.
	  Moreover lowmem_scan is called way too often for the heavy
	  work it performs.
	- it is not reclaim context aware - no NUMA and/or memcg
	  awareness.

As the code stands right now it just adds a maintenance overhead when
core MM changes have to update lowmemorykiller.c as well. It also seems
that the alternative LMK implementation will be solely in the userspace
so this code has no perspective it seems. The staging tree is supposed
to be for a code which needs to be put in shape before it can be merged
which is not the case here obviously.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

vc04_services has an ioctl interface to dump arbitrary memory
to a custom debug log.  This is typically only needed by
diagnostic tools, and can potentially be a security issue
if the devtmpfs node doesn't have adequate permissions set.

Since the ability to dump memory still has debugging value,
create a new build configuration and disable the feature
by default.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds compatibility wrappers for the ioctls
exposed by vchiq/vc04_services.  The compat ioctls are
completely implemented on top of the native ioctls.  No
existing lines are modified.

While the ideal approach would be to cleanup the existing
code, this path is simplier and easier to review. While
it does have a small runtime performance penality vs
seperating the existing code into wrapper+worker functions,
the penality is small since only the metadata is copied
back onto the 32 bit user mode stack.

The on top of approach is the approach used by several
existing performance critical subsystems of Linux such
as the DRM 3D graphics subsystem.

Testing:

1. A 32 bit chroot was created on a RPI 3 and vchiq_test
was built for armhf.  The usual tests were run such as
vchiq_test -f 10 and vchiq_test -p.

2. This patch was copied onto the shipping version of
the Linux kernel used for the RPI and that kernel was
built for arm64. That kernel was used to boot Raspbian.
Many of the builtin features are now functional such
as the "hello_pi" examples, and minecraft_pi.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The camera driver passes messages back and forth between the firmware with
requests and replies.  One of the fields of the message header called
context is a pointer so the size changes between 32 bit and 64 bit.

The context field is used to pair reply messages from the firmware with
request messages from the kernel.  The simple solution would be
to use the padding field for the upper 32 bits of pointers, but this
would rely on the firmware always copying the pad field.

So instead handles are generated that are 32 bit numbers and a mapping
stored in a btree as implemented by the btree library in the kernel lib
directory.  The mapping pairs the handle with the pointer to the actual
data. The btree library was chosen since it's very easy to use and
red black trees would be overkill.

The camera driver also now forces in the btree library if the camera is
included in the build.  The btree library is a hidden configuration
option.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The camera driver passes messages back and forth between the firmware with
requests and replies.  One of the fields of the message header called
control_service is a pointer so the size changes between 32 bit and 64 bit.

Luckly, the field is not interperated by the driver, so it can be changed
to a u32 which has a fixed size.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This cuts it back to what is basically a few wrapper functions. At some point
we can kill most of these too by changing the callers.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove the content that is guarded by this define
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Once we are a bit more sure of their obsolescence they will be deleted
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The camera code has an explicit cache flush operation
which is not portable.  Now that vc04_services is using portable
DMA APIs that already do the cache flushing, explicit flushes
should no longer be needed.

The one call to __cpuc_flush_dcache_area has been removed.

Testing:
	The offical V2 camera for the RPI was tested on a RPI 3
	running in 32 bit mode(armhf).  The cheese application
	and ffmpeg was used to view and stream video from the
	camera.  Nothing new seems to be broken without the
	cache flushing.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Sparse generates two warnings related to incorrect type in assignment.
This patch changes the types in the struct defined in unisys
Signed-off-by: Andrea Ghittino <aghittino@gmail.com>
Acked-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace "the the " with "the". The replacement couldn't be
automated because sometimes the first "the" was meant to be another
word.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace "the the " with "the". The replacement couldn't be
automated because sometimes the first "the" was meant to be another
word.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace "the the " with "the". The replacement couldn't be
automated because sometimes the first "the" was meant to be another
word.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: David Kershner <david.kershner@unisys.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Changed permissions to octal style
Found using checkpatch
Signed-off-by: Derek Robson <robsonde@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes unused semaphores alsa_stream->buffers_update_sem
and alsa_stream->control_sem from struct bcm2835_alsa_stream
Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use macro min_t to get the minimum of two values for readability.
Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace "is is " with "is". The replacement couldn't be
automated because sometimes the first "is" was meant to be another
word.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace "is is " with "is". The replacement couldn't be
automated because sometimes the first "is" was meant to be another
word.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The structures and the macros in the header file are not used
anywhere inside the kernel (verified by using grep). The structures
and macros were leftover from the patch
341f1f0a "staging: lustre: remove
remote client support". Also, removed the include statements for
lustre_eacl.h.
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The structure is used as an argument to module_param macro. This
macro calls a bunch of other macros and finally assigns the instance
of the kernel_param_ops structure to the const struct
kernel_param_ops* field of a variable of type kernel_param. Hence,
const can be added to the structure.

Coccinelle Script:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct kernel_param_ops i@p = { ... };

@ok1@
identifier r.i;
expression e;
position p;
@@
e = i@p

@script:python s@
i << r.i;
t;
@@
coccinelle.t = i[10:];

@ok2@
declarer name module_param;
expression e1,e2;
position p;
@@
module_param(e1,s.t@p,e2);

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct kernel_param_ops i = { ... };
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fixed the following sparse warning by adding proper cast:
drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74: warning: incorrect type in argument 2 (different address spaces)
drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74:    expected char const [noderef] <asn:1>*<noident>
drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74:    got char *[assigned] sval
Signed-off-by: Mario Bambagini <mario.bambagini@gmail.com>
Acked-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>