linux-kernel - [PATCH 4/7] kernel/resource: iomem_is

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Date:   Thu, 14 Dec 2017 10:50:19 -0500
From:   Yaowei Bai <baiyaowei@...s.chinamobile.com>
To:     akpm@...ux-foundation.org, rdunlap@...radead.org,
        rientjes@...gle.com, joe@...ches.com
Cc:     linux-kernel@...r.kernel.org, baiyaowei@...s.chinamobile.com
Subject: [PATCH 4/7] kernel/resource: iomem_is_exclusive can be boolean

This patch makes iomem_is_exclusive return bool due to this
particular function only using either one or zero as its return
value.

No functional change.

Signed-off-by: Yaowei Bai <baiyaowei@...s.chinamobile.com>
---
 include/linux/ioport.h |  2 +-
 kernel/resource.c      | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 93b4183..da0ebae 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -265,7 +265,7 @@ extern struct resource * __devm_request_region(struct device *dev,
 extern void __devm_release_region(struct device *dev, struct resource *parent,
 				  resource_size_t start, resource_size_t n);
 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
-extern int iomem_is_exclusive(u64 addr);
+extern bool iomem_is_exclusive(u64 addr);
 
 extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
diff --git a/kernel/resource.c b/kernel/resource.c
index 54ba6de..a269b9a1 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1563,17 +1563,17 @@ int iomem_map_sanity_check(resource_size_t addr, unsigned long size)
 
 /*
  * check if an address is reserved in the iomem resource tree
- * returns 1 if reserved, 0 if not reserved.
+ * returns true if reserved, false if not reserved.
  */
-int iomem_is_exclusive(u64 addr)
+bool iomem_is_exclusive(u64 addr)
 {
 	struct resource *p = &iomem_resource;
-	int err = 0;
+	bool err = false;
 	loff_t l;
 	int size = PAGE_SIZE;
 
 	if (!strict_iomem_checks)
-		return 0;
+		return false;
 
 	addr = addr & PAGE_MASK;
 
@@ -1596,7 +1596,7 @@ int iomem_is_exclusive(u64 addr)
 			continue;
 		if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM)
 				|| p->flags & IORESOURCE_EXCLUSIVE) {
-			err = 1;
+			err = true;
 			break;
 		}
 	}
-- 
1.8.3.1