From 7c4f10b9003dc8423df07574ba197bbbe3bc382b Mon Sep 17 00:00:00 2001 From: Rune Torgersen Date: Sat, 24 May 2008 01:59:15 +1000 Subject: [PATCH] powerpc: Check that TASK_SIZE does not overlap KERNEL_START Make sure CONFIG_TASK_SIZE does not overlap CONFIG_KERNEL_START This could happen when overriding settings to get 1GB lowmem, and would lead to userland mysteriousely hanging. This setting is only used by PPC32. Signed-off-by: Rune Torgersen Acked-by: Kumar Gala Signed-off-by: Paul Mackerras --- include/asm-powerpc/processor.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h index cf83f2d..a1deed8 100644 --- a/include/asm-powerpc/processor.h +++ b/include/asm-powerpc/processor.h @@ -81,6 +81,10 @@ extern struct task_struct *last_task_used_altivec; extern struct task_struct *last_task_used_spe; #ifdef CONFIG_PPC32 + +#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START +#error User TASK_SIZE overlaps with KERNEL_START address +#endif #define TASK_SIZE (CONFIG_TASK_SIZE) /* This decides where the kernel will search for a free chunk of vm -- 2.7.4