Commit cc24c405 authored May 24, 2010 by Greg Ungerer

m68knommu: remove size limit on non-MMU TASK_SIZE

The TASK_SIZE define is used in some places as a limit on the size of
the virtual address space of a process. On non-MMU systems those addresses
used in comparison will be physical addresses, and they could be anywhere
in the 32bit physical address space. So for !CONFIG_MMU systems set the
TASK_SIZE to the maximum physical address.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

parent 9fcce0ba

arch/m68k/include/asm/processor.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -44,11 +44,15 @@ static inline void wrusp(unsigned long usp)
		* User space process size: 3.75GB. This is hardcoded into a few places,
		* so don't change it unless you know what you are doing.
		*/
		#ifdef CONFIG_MMU
		#ifndef CONFIG_SUN3
		#define TASK_SIZE (0xF0000000UL)
		#else
		#define TASK_SIZE (0x0E000000UL)
		#endif
		#else
		#define TASK_SIZE (0xFFFFFFFFUL)
		#endif

		#ifdef __KERNEL__
		#define STACK_TOP TASK_SIZE