Commit 6cde6d42 authored Jan 11, 2011 by Will Deacon Committed by Russell King Jan 11, 2011

ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU



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.

Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent edc4d272

arch/arm/kernel/process.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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