Hi Toshi,
2013/04/03 1:17, Toshi Kani wrote:
> Added __adjust_resource(), which is called by adjust_resource()
> internally after the resource_lock is held. There is no interface
> change to adjust_resource(). This change allows other functions
> to call __adjust_resource() internally while the resource_lock is
> held.
>
> Signed-off-by: Toshi Kani <toshi.kani@xxxxxx>
The patch looks good.
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Thanks,
Yasuaki Ishimatsu
> ---
> kernel/resource.c | 35 ++++++++++++++++++++++-------------
> 1 file changed, 22 insertions(+), 13 deletions(-)
>
> diff --git a/kernel/resource.c b/kernel/resource.c
> index 73f35d4..ae246f9 100644
> --- a/kernel/resource.c
> +++ b/kernel/resource.c
> @@ -706,24 +706,13 @@ void insert_resource_expand_to_fit(struct resource *root, struct resource *new)
> write_unlock(&resource_lock);
> }
>
> -/**
> - * adjust_resource - modify a resource's start and size
> - * @res: resource to modify
> - * @start: new start value
> - * @size: new size
> - *
> - * Given an existing resource, change its start and size to match the
> - * arguments. Returns 0 on success, -EBUSY if it can't fit.
> - * Existing children of the resource are assumed to be immutable.
> - */
> -int adjust_resource(struct resource *res, resource_size_t start, resource_size_t size)
> +static int __adjust_resource(struct resource *res, resource_size_t start,
> + resource_size_t size)
> {
> struct resource *tmp, *parent = res->parent;
> resource_size_t end = start + size - 1;
> int result = -EBUSY;
>
> - write_lock(&resource_lock);
> -
> if (!parent)
> goto skip;
>
> @@ -751,6 +740,26 @@ skip:
> result = 0;
>
> out:
> + return result;
> +}
> +
> +/**
> + * adjust_resource - modify a resource's start and size
> + * @res: resource to modify
> + * @start: new start value
> + * @size: new size
> + *
> + * Given an existing resource, change its start and size to match the
> + * arguments. Returns 0 on success, -EBUSY if it can't fit.
> + * Existing children of the resource are assumed to be immutable.
> + */
> +int adjust_resource(struct resource *res, resource_size_t start,
> + resource_size_t size)
> +{
> + int result;
> +
> + write_lock(&resource_lock);
> + result = __adjust_resource(res, start, size);
> write_unlock(&resource_lock);
> return result;
> }
>
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