Commit 7c4f10b9 authored May 24, 2008 by Rune Torgersen Committed by Paul Mackerras Jun 09, 2008

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 <runet@innovsys.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent cec0dd94

include/asm-powerpc/processor.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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