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kernel/resource: iomem_is_exclusive can be boolean

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

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-5-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yaowei Bai 2018-02-06 15:41:28 -08:00 committed by Linus Torvalds
parent 77ef80c65a
commit 9825b451f9
2 changed files with 6 additions and 6 deletions
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2
include/linux/ioport.h
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@ -265,7 +265,7 @@ extern struct resource * __devm_request_region(struct device *dev,
extern void __devm_release_region(struct device *dev, struct resource *parent, extern void __devm_release_region(struct device *dev, struct resource *parent,
resource_size_t start, resource_size_t n); resource_size_t start, resource_size_t n);
extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); 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 extern int
walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,

10
kernel/resource.c
View File

@ -1563,17 +1563,17 @@ static int strict_iomem_checks;
/* /*
* check if an address is reserved in the iomem resource tree * 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; struct resource *p = &iomem_resource;
int err = 0; bool err = false;
loff_t l; loff_t l;
int size = PAGE_SIZE; int size = PAGE_SIZE;
if (!strict_iomem_checks) if (!strict_iomem_checks)
return 0; return false;
addr = addr & PAGE_MASK; addr = addr & PAGE_MASK;
@ -1596,7 +1596,7 @@ int iomem_is_exclusive(u64 addr)
continue; continue;
if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM) if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM)
|| p->flags & IORESOURCE_EXCLUSIVE) { || p->flags & IORESOURCE_EXCLUSIVE) {
err = 1; err = true;
break; break;
} }
} }