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uml: clean up TASK_SIZE usage

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Clean up the calculation and use of the usable address space size on the host.

task_size is gone, replaced with TASK_SIZE, which is calculated from
CONFIG_TOP_ADDR.  get_kmem_end and set_task_sizes_skas are also gone.

host_task_size, which refers to the entire address space usable by the UML
kernel and which may be larger than the address space usable by a UML process,
since that has to end on a pgdir boundary, is replaced by CONFIG_TOP_ADDR.

STACK_TOP is now TASK_SIZE minus the two stub pages.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
2008-02-04 22:31:00 -08:00
committed by Linus Torvalds
parent b7c000cbc4
commit 42a2b54ce8
11 changed files with 23 additions and 49 deletions
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4
include/asm-um/processor-generic.h
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@@ -94,9 +94,7 @@ static inline void mm_copy_segments(struct mm_struct *from_mm,
/*
* User space process size: 3GB (default).
*/
extern unsigned long task_size;
#define TASK_SIZE (task_size)
#define TASK_SIZE (CONFIG_TOP_ADDR & PGDIR_MASK)
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.