When running without an MMU, we do not need to install a mapping for the
vectors page. Attempting to do so causes a compile-time error because
install_special_mapping is not defined.
This patch adds compile-time guards to the vector mapping functions
so that we can build nommu configurations once more.
Cc: Greg Ungerer <redacted>
Signed-off-by: Will Deacon <redacted>
---
arch/arm/kernel/process.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index e76fcaa..94bbedb 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -483,6 +483,7 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
}
+#ifdef CONFIG_MMU
/*
* The vectors page is always readable from user space for the
* atomic helpers and the signal restart code. Let's declare a mapping
@@ -503,3 +504,4 @@ const char *arch_vma_name(struct vm_area_struct *vma)
{
return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL;
}
+#endif--
1.7.0.4
On Tue, Jan 11, 2011 at 12:02:17PM +0000, Will Deacon wrote:
When running without an MMU, we do not need to install a mapping for the
vectors page. Attempting to do so causes a compile-time error because
install_special_mapping is not defined.
This patch adds compile-time guards to the vector mapping functions
so that we can build nommu configurations once more.
I had a similar patch a few days ago doing the same thing... when Greg's
acked it, please submit to the patch system, thanks.
Hi Will,
On 11/01/11 22:02, Will Deacon wrote:
When running without an MMU, we do not need to install a mapping for the
vectors page. Attempting to do so causes a compile-time error because
install_special_mapping is not defined.
This patch adds compile-time guards to the vector mapping functions
so that we can build nommu configurations once more.
Cc: Greg Ungerer<redacted>
Signed-off-by: Will Deacon<redacted>
I hit this a couple of days ago too, looks good.
Acked-by: Greg Ungerer <redacted>
Regards
Greg
quoted hunk
arch/arm/kernel/process.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index e76fcaa..94bbedb 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -483,6 +483,7 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
}
+#ifdef CONFIG_MMU
/*
* The vectors page is always readable from user space for the
* atomic helpers and the signal restart code. Let's declare a mapping
@@ -503,3 +504,4 @@ const char *arch_vma_name(struct vm_area_struct *vma)
{
return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL;
}
+#endif
--
------------------------------------------------------------------------
Greg Ungerer -- Principal Engineer EMAIL: gerg at snapgear.com
SnapGear Group, McAfee PHONE: +61 7 3435 2888
8 Gardner Close, FAX: +61 7 3891 3630
Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com