From: Magnus Damm <damm@igel.co.jp>
Date: Wed, 30 Jul 2008 05:32:57 +0000 (-0700)
Subject: resource: add resource_size()
X-Git-Tag: v2.6.27-rc2~203
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=1a4e564b7db999fbe5d88318c96ac8747699d417;p=~shefty%2Frdma-dev.git

resource: add resource_size()

Avoid one-off errors by introducing a resource_size() function.

Signed-off-by: Magnus 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 2cd07cc2968..22d2115458c 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -118,6 +118,10 @@ extern int allocate_resource(struct resource *root, struct resource *new,
 int adjust_resource(struct resource *res, resource_size_t start,
 		    resource_size_t size);
 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 */
 #define request_region(start,n,name)	__request_region(&ioport_resource, (start), (n), (name))
diff --git a/kernel/resource.c b/kernel/resource.c
index 74af2d7cb5a..f5b518eabef 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -490,7 +490,7 @@ resource_size_t resource_alignment(struct resource *res)
 {
 	switch (res->flags & (IORESOURCE_SIZEALIGN | IORESOURCE_STARTALIGN)) {
 	case IORESOURCE_SIZEALIGN:
-		return res->end - res->start + 1;
+		return resource_size(res);
 	case IORESOURCE_STARTALIGN:
 		return res->start;
 	default: