Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-16 02:14:58 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

resource: Add resource set range and size helpers

Browse Source 
Setting the end address for a resource with a given size lacks a helper and
is therefore coded manually unlike the getter side which has a helper for
resource size calculation. Also, almost all callsites that calculate the
end address for a resource also set the start address right before it like
this:

  res->start = start_addr;
  res->end = res->start + size - 1;

Add resource_set_range(res, start_addr, size) that sets the start address
and calculates the end address to simplify this often repeated fragment.

Also add resource_set_size() for the cases where setting the start address
of the resource is not necessary but mention in its kerneldoc that
resource_set_range() is preferred when setting both addresses.

Link: https://lore.kernel.org/r/20240614100606.15830-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ilpo Järvinen 2024-06-14 13:06:03 +03:00 committed by Bjorn Helgaas
parent 9852d85ec9
commit 9fb6fef0fb
1 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
include/linux/ioport.h
View File

@ -249,6 +249,38 @@ struct resource *lookup_resource(struct resource *root, resource_size_t start);
int adjust_resource(struct resource *res, resource_size_t start,
resource_size_t size);
resource_size_t resource_alignment(struct resource *res);
/**
* resource_set_size - Calculate resource end address from size and start
* @res: Resource descriptor
* @size: Size of the resource
*
* Calculate the end address for @res based on @size.
*
* Note: The start address of @res must be set when calling this function.
* Prefer resource_set_range() if setting both the start address and @size.
*/
static inline void resource_set_size(struct resource *res, resource_size_t size)
{
res->end = res->start + size - 1;
}
/**
* resource_set_range - Set resource start and end addresses
* @res: Resource descriptor
* @start: Start address for the resource
* @size: Size of the resource
*
* Set @res start address and calculate the end address based on @size.
*/
static inline void resource_set_range(struct resource *res,
resource_size_t start,
resource_size_t size)
{
res->start = start;
resource_set_size(res, size);
}
static inline resource_size_t resource_size(const struct resource *res)
{
return res->end - res->start + 1;