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Subject[PATCH 4/7] kernel/resource: iomem_is_exclusive can be boolean
Date
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@cmss.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


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