Subject: Re: linux-next: build warning after merge of the final tree (akpm tree related)

From: Michel Lespinasse <[email-masked]>
Date: Thu, 8 Nov 2012 20:30:47 -0800

On Fri, Nov 09, 2012 at 03:19:03PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the final tree, today's linux-next build (arm defconfig)
> produced this warning:
> 
> arch/arm/mm/mmap.c: In function 'arch_get_unmapped_area':
> arch/arm/mm/mmap.c:60:16: warning: unused variable 'start_addr' [-Wunused-variable]
> 
> Introduced by commit "mm: use vm_unmapped_area() on arm architecture".

Sorry for the mistakes. The following changes should fix what's been reported so far.

commit 1c98949798ce7a1d4a910775623e1830cf88a92c
Author: Michel Lespinasse <[email-masked]>
Date:   Thu Nov 8 20:26:34 2012 -0800

    fix mm: use vm_unmapped_area() on sparc32 architecture

diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
index a59bc637f9af..a20b5ab4c701 100644
--- a/arch/sparc/kernel/sys_sparc_32.c
+++ b/arch/sparc/kernel/sys_sparc_32.c
@@ -38,7 +38,6 @@ asmlinkage unsigned long sys_getpagesize(void)
 
 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
 {
-	struct vm_area_struct * vmm;
 	struct vm_unmapped_area_info info;
 
 	if (flags & MAP_FIXED) {

commit aa96ebbc9ec664ddafc841f7631c4a092b10c0d8
Author: Michel Lespinasse <[email-masked]>
Date:   Thu Nov 8 20:25:48 2012 -0800

    fix mm: use vm_unmapped_area() in hugetlbfs on sparc64 architecture

diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index 42e5dba6cb26..d2b59441ebdd 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -60,7 +60,6 @@ hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
 				  const unsigned long pgoff,
 				  const unsigned long flags)
 {
-	struct vm_area_struct *vma;
 	struct mm_struct *mm = current->mm;
 	unsigned long addr = addr0;
 	struct vm_unmapped_area_info info;

commit ff4dd9742ce0a5f7c703013e70eeb84b845c8fa2
Author: Michel Lespinasse <[email-masked]>
Date:   Thu Nov 8 20:24:53 2012 -0800

    mm-use-vm_unmapped_area-on-sparc64-architecture-fix2

diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 2a5d61587ca2..a836ee967ecb 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -89,7 +89,6 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
 	struct mm_struct *mm = current->mm;
 	struct vm_area_struct * vma;
 	unsigned long task_size = TASK_SIZE;
-	unsigned long start_addr;
 	int do_color_align;
 	struct vm_unmapped_area_info info;
 
@@ -191,7 +190,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
 	info.length = len;
 	info.low_limit = PAGE_SIZE;
 	info.high_limit = mm->mmap_base;
-	info.align_mask = do_colour_align ? (PAGE_MASK & shm_align_mask) : 0;
+	info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
 	info.align_offset = pgoff << PAGE_SHIFT;
 	addr = vm_unmapped_area(&info);

commit ed558f3723a4ac2fb71d6c8fc70116994af6e61d
Author: Michel Lespinasse <[email-masked]>
Date:   Thu Nov 8 20:22:36 2012 -0800

    mm-use-vm_unmapped_area-on-arm-architecture-fix2

diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index f4fec6d43d50..10062ceadd1c 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -57,7 +57,6 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
 {
 	struct mm_struct *mm = current->mm;
 	struct vm_area_struct *vma;
-	unsigned long start_addr;
 	int do_align = 0;
 	int aliasing = cache_is_vipt_aliasing();
 	struct vm_unmapped_area_info info;