diff mbox series

[v2,1/5] mm: ioremap: Use more sensibly name in ioremap_prot()

Message ID 20220429103225.75121-2-wangkefeng.wang@huawei.com (mailing list archive)
State New, archived
Headers show
Series arm64: Cleanup ioremap() and support ioremap_prot() | expand

Commit Message

Kefeng Wang April 29, 2022, 10:32 a.m. UTC
Use more meaningful and sensibly naming phys_addr
instead addr in ioremap_prot().

Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 include/asm-generic/io.h |  2 +-
 mm/ioremap.c             | 12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

Comments

Anshuman Khandual May 2, 2022, 9:38 a.m. UTC | #1
On 4/29/22 16:02, Kefeng Wang wrote:
> Use more meaningful and sensibly naming phys_addr
> instead addr in ioremap_prot().
> 
> Suggested-by: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>

Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>

> ---
>  include/asm-generic/io.h |  2 +-
>  mm/ioremap.c             | 12 ++++++------
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
> index 7ce93aaf69f8..e6ffa2519f08 100644
> --- a/include/asm-generic/io.h
> +++ b/include/asm-generic/io.h
> @@ -964,7 +964,7 @@ static inline void iounmap(volatile void __iomem *addr)
>  #elif defined(CONFIG_GENERIC_IOREMAP)
>  #include <linux/pgtable.h>
>  
> -void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot);
> +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, unsigned long prot);
>  void iounmap(volatile void __iomem *addr);
>  
>  static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
> diff --git a/mm/ioremap.c b/mm/ioremap.c
> index 5fe598ecd9b7..1f9597fbcc07 100644
> --- a/mm/ioremap.c
> +++ b/mm/ioremap.c
> @@ -11,20 +11,20 @@
>  #include <linux/io.h>
>  #include <linux/export.h>
>  
> -void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
> +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, unsigned long prot)
>  {
>  	unsigned long offset, vaddr;
>  	phys_addr_t last_addr;
>  	struct vm_struct *area;
>  
>  	/* Disallow wrap-around or zero size */
> -	last_addr = addr + size - 1;
> -	if (!size || last_addr < addr)
> +	last_addr = phys_addr + size - 1;
> +	if (!size || last_addr < phys_addr)
>  		return NULL;
>  
>  	/* Page-align mappings */
> -	offset = addr & (~PAGE_MASK);
> -	addr -= offset;
> +	offset = phys_addr & (~PAGE_MASK);
> +	phys_addr -= offset;
>  	size = PAGE_ALIGN(size + offset);
>  
>  	area = get_vm_area_caller(size, VM_IOREMAP,
> @@ -33,7 +33,7 @@ void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
>  		return NULL;
>  	vaddr = (unsigned long)area->addr;
>  
> -	if (ioremap_page_range(vaddr, vaddr + size, addr, __pgprot(prot))) {
> +	if (ioremap_page_range(vaddr, vaddr + size, phys_addr, __pgprot(prot))) {
>  		free_vm_area(area);
>  		return NULL;
>  	}
diff mbox series

Patch

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 7ce93aaf69f8..e6ffa2519f08 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -964,7 +964,7 @@  static inline void iounmap(volatile void __iomem *addr)
 #elif defined(CONFIG_GENERIC_IOREMAP)
 #include <linux/pgtable.h>
 
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot);
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, unsigned long prot);
 void iounmap(volatile void __iomem *addr);
 
 static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
diff --git a/mm/ioremap.c b/mm/ioremap.c
index 5fe598ecd9b7..1f9597fbcc07 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -11,20 +11,20 @@ 
 #include <linux/io.h>
 #include <linux/export.h>
 
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, unsigned long prot)
 {
 	unsigned long offset, vaddr;
 	phys_addr_t last_addr;
 	struct vm_struct *area;
 
 	/* Disallow wrap-around or zero size */
-	last_addr = addr + size - 1;
-	if (!size || last_addr < addr)
+	last_addr = phys_addr + size - 1;
+	if (!size || last_addr < phys_addr)
 		return NULL;
 
 	/* Page-align mappings */
-	offset = addr & (~PAGE_MASK);
-	addr -= offset;
+	offset = phys_addr & (~PAGE_MASK);
+	phys_addr -= offset;
 	size = PAGE_ALIGN(size + offset);
 
 	area = get_vm_area_caller(size, VM_IOREMAP,
@@ -33,7 +33,7 @@  void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
 		return NULL;
 	vaddr = (unsigned long)area->addr;
 
-	if (ioremap_page_range(vaddr, vaddr + size, addr, __pgprot(prot))) {
+	if (ioremap_page_range(vaddr, vaddr + size, phys_addr, __pgprot(prot))) {
 		free_vm_area(area);
 		return NULL;
 	}