[PATCH 0/2] openrisc: mm/init.c: fix compilation warnings

[PATCH 0/2] openrisc: mm/init.c: fix compilation warnings

[Mike Rapoport]

From: Mike Rapoport <rppt@linux.ibm.com>

Hi,

Kbuld test bot reported an unused in map_ram() and while on it I've found
another compilation warning about unused variable in paging_init().

Here are the fixes for both.
The patches are vs 5.12.

Mike Rapoport (2):
  openrisc: mm/init.c: remove unused memblock_region variable in map_ram()
  openrisc: mm/init.c: remove unused variable 'end' in paging_init()

 arch/openrisc/mm/init.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)


base-commit: 9f4ad9e425a1d3b6a34617b8ea226d56a119a717
-- 
2.28.0

[PATCH 1/2] openrisc: mm/init.c: remove unused memblock_region variable in map_ram()

[Mike Rapoport]

From: Mike Rapoport <rppt@linux.ibm.com>

Kernel test robot reports:

cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/openrisc/mm/init.c:125:10: warning: Uninitialized variable: region [uninitvar]
            region->base, region->base + region->size);
            ^

Replace usage of memblock_region fields with 'start' and 'end' variables
that are initialized in for_each_mem_range() and remove the declaration of
region.

Fixes: b10d6bca8720 ("arch, drivers: replace for_each_membock() with for_each_mem_range()")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/openrisc/mm/init.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index bf9b2310fc93..f3fa02b8838a 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -75,7 +75,6 @@ static void __init map_ram(void)
 	/* These mark extents of read-only kernel pages...
 	 * ...from vmlinux.lds.S
 	 */
-	struct memblock_region *region;
 
 	v = PAGE_OFFSET;
 
@@ -121,7 +120,7 @@ static void __init map_ram(void)
 		}
 
 		printk(KERN_INFO "%s: Memory: 0x%x-0x%x\n", __func__,
-		       region->base, region->base + region->size);
+		       start, end);
 	}
 }
 
-- 
2.28.0

[PATCH 2/2] openrisc: mm/init.c: remove unused variable 'end' in paging_init()

[Mike Rapoport]

From: Mike Rapoport <rppt@linux.ibm.com>

A build with W=1 enabled produces the following warning:

  CC      arch/openrisc/mm/init.o
arch/openrisc/mm/init.c: In function 'paging_init':
arch/openrisc/mm/init.c:131:16: warning: variable 'end' set but not used [-Wunused-but-set-variable]
  131 |  unsigned long end;
      |                ^~~

Remove the unused variable 'end'.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/openrisc/mm/init.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index f3fa02b8838a..6e38ec96cab8 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -128,7 +128,6 @@ void __init paging_init(void)
 {
 	extern void tlb_init(void);
 
-	unsigned long end;
 	int i;
 
 	printk(KERN_INFO "Setting up paging and PTEs.\n");
@@ -144,8 +143,6 @@ void __init paging_init(void)
 	 */
 	current_pgd[smp_processor_id()] = init_mm.pgd;
 
-	end = (unsigned long)__va(max_low_pfn * PAGE_SIZE);
-
 	map_ram();
 
 	zone_sizes_init();
-- 
2.28.0

Re: [PATCH 1/2] openrisc: mm/init.c: remove unused memblock_region variable in map_ram()

[Stafford Horne]

On Sun, May 09, 2021 at 12:11:02PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
> 
> Kernel test robot reports:
> 
> cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
> 
> >> arch/openrisc/mm/init.c:125:10: warning: Uninitialized variable: region [uninitvar]
>             region->base, region->base + region->size);
>             ^
> 
> Replace usage of memblock_region fields with 'start' and 'end' variables
> that are initialized in for_each_mem_range() and remove the declaration of
> region.
> 
> Fixes: b10d6bca8720 ("arch, drivers: replace for_each_membock() with for_each_mem_range()")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
>  arch/openrisc/mm/init.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
> index bf9b2310fc93..f3fa02b8838a 100644
> --- a/arch/openrisc/mm/init.c
> +++ b/arch/openrisc/mm/init.c
> @@ -75,7 +75,6 @@ static void __init map_ram(void)
>  	/* These mark extents of read-only kernel pages...
>  	 * ...from vmlinux.lds.S
>  	 */
> -	struct memblock_region *region;
>  
>  	v = PAGE_OFFSET;
>  
> @@ -121,7 +120,7 @@ static void __init map_ram(void)
>  		}
>  
>  		printk(KERN_INFO "%s: Memory: 0x%x-0x%x\n", __func__,
> -		       region->base, region->base + region->size);
> +		       start, end);
>  	}
>  }

Thanks I will queue this.

-Stafford

Re: [PATCH 2/2] openrisc: mm/init.c: remove unused variable 'end' in paging_init()

[Stafford Horne]

On Sun, May 09, 2021 at 12:11:03PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
> 
> A build with W=1 enabled produces the following warning:
> 
>   CC      arch/openrisc/mm/init.o
> arch/openrisc/mm/init.c: In function 'paging_init':
> arch/openrisc/mm/init.c:131:16: warning: variable 'end' set but not used [-Wunused-but-set-variable]
>   131 |  unsigned long end;
>       |                ^~~
> 
> Remove the unused variable 'end'.
> 
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
>  arch/openrisc/mm/init.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
> index f3fa02b8838a..6e38ec96cab8 100644
> --- a/arch/openrisc/mm/init.c
> +++ b/arch/openrisc/mm/init.c
> @@ -128,7 +128,6 @@ void __init paging_init(void)
>  {
>  	extern void tlb_init(void);
>  
> -	unsigned long end;
>  	int i;
>  
>  	printk(KERN_INFO "Setting up paging and PTEs.\n");
> @@ -144,8 +143,6 @@ void __init paging_init(void)
>  	 */
>  	current_pgd[smp_processor_id()] = init_mm.pgd;
>  
> -	end = (unsigned long)__va(max_low_pfn * PAGE_SIZE);
> -
>  	map_ram();
>  
>  	zone_sizes_init();

Thanks, I will queue this in the openrisc fixes queue.

-Stafford