From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Tue, 11 Jan 2011 12:02:17 +0000 Subject: [PATCH] ARM: nommu: avoid mapping vectors page when !CONFIG_MMU Message-ID: <1294747337-18238-1-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Signed-off-by: Will Deacon --- 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