Commit 1a4e564b authored by Magnus Damm's avatar Magnus Damm Committed by Linus Torvalds

resource: add resource_size()

Avoid one-off errors by introducing a resource_size() function.
Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e958d3ac
...@@ -118,6 +118,10 @@ extern int allocate_resource(struct resource *root, struct resource *new, ...@@ -118,6 +118,10 @@ extern int allocate_resource(struct resource *root, struct resource *new,
int adjust_resource(struct resource *res, resource_size_t start, int adjust_resource(struct resource *res, resource_size_t start,
resource_size_t size); resource_size_t size);
resource_size_t resource_alignment(struct resource *res); resource_size_t resource_alignment(struct resource *res);
static inline resource_size_t resource_size(struct resource *res)
{
return res->end - res->start + 1;
}
/* Convenience shorthand with allocation */ /* Convenience shorthand with allocation */
#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
......
...@@ -490,7 +490,7 @@ resource_size_t resource_alignment(struct resource *res) ...@@ -490,7 +490,7 @@ resource_size_t resource_alignment(struct resource *res)
{ {
switch (res->flags & (IORESOURCE_SIZEALIGN | IORESOURCE_STARTALIGN)) { switch (res->flags & (IORESOURCE_SIZEALIGN | IORESOURCE_STARTALIGN)) {
case IORESOURCE_SIZEALIGN: case IORESOURCE_SIZEALIGN:
return res->end - res->start + 1; return resource_size(res);
case IORESOURCE_STARTALIGN: case IORESOURCE_STARTALIGN:
return res->start; return res->start;
default: default:
......
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