The local 'val' variable is used to store a value and immediately return
it to its caller, and hence serves no purpose. Just drop it and directly
return the value.

Signed-off-by: Thierry Reding <treding@nvidia.com>

This array never needs to be modified and therefore can be read-only
data.

Signed-off-by: Thierry Reding <treding@nvidia.com>

There's no need to wrap the BIT() macro into an extra set of parentheses
because it's already implemented to use its own set.

Signed-off-by: Thierry Reding <treding@nvidia.com>

Insert a number of blank lines in places where they increase readability
of the code. Also collapse various variable declarations to shorten some
functions and finally rewrite some code for readability.

Signed-off-by: Thierry Reding <treding@nvidia.com>

Fix a couple of occurrences where no blank line was used to separate
variable declarations from code or where block comments were wrongly
formatted.

Signed-off-by: Thierry Reding <treding@nvidia.com>

Use kcalloc() to allocate arrays rather than passing the product of the
size per element by the number of elements to kzalloc().

Signed-off-by: Thierry Reding <treding@nvidia.com>

The local 'pos' variable doesn't serve any purpose other than being a
shortcut for pb->pos, but the result doesn't remove much, so simply drop
the local variable.

Signed-off-by: Thierry Reding <treding@nvidia.com>

find_first_zero_bit() returns an unsigned long, so make the local
variable that stores the result the same type for consistency.

Signed-off-by: Thierry Reding <treding@nvidia.com>

IDs can never be negative so use unsigned int. In some instances an
explicitly sized type (such as u32) was used for no particular reason,
so turn those into unsigned int as well for consistency.

Signed-off-by: Thierry Reding <treding@nvidia.com>

The number of channels, syncpoints, bases and mlocks can never be
negative, so use unsigned int instead of int. Also make loop variables
the same type for consistency.

Signed-off-by: Thierry Reding <treding@nvidia.com>