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[PATCH] freepgt: remove MM_VM_SIZE(mm)

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There's only one usage of MM_VM_SIZE(mm) left, and it's a troublesome macro
because mm doesn't contain the (32-bit emulation?) info needed.  But it too is
only needed because we ignore the end from the vma list.

We could make flush_pgtables return that end, or unmap_vmas.  Choose the
latter, since it's a natural fit with unmap_mapping_range_vma needing to know
its restart addr.  This does make more than minimal change, but if unmap_vmas
had returned the end before, this is how we'd have done it, rather than
storing the break_addr in zap_details.

unmap_vmas used to return count of vmas scanned, but that's just debug which
hasn't been useful in a while; and if we want the map_count 0 on exit check
back, it can easily come from the final remove_vm_struct loop.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins
2005-04-19 13:29:15 -07:00
committed by Linus Torvalds
parent e0da382c92
commit ee39b37b23
6 changed files with 18 additions and 39 deletions
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8
include/asm-ia64/processor.h
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@@ -42,14 +42,6 @@
*/
#define TASK_SIZE (current->thread.task_size)
/*
* MM_VM_SIZE(mm) gives the maximum address (plus 1) which may contain a mapping for
* address-space MM. Note that with 32-bit tasks, this is still DEFAULT_TASK_SIZE,
* because the kernel may have installed helper-mappings above TASK_SIZE. For example,
* for x86 emulation, the LDT and GDT are mapped above TASK_SIZE.
*/
#define MM_VM_SIZE(mm) DEFAULT_TASK_SIZE
/*
* This decides where the kernel will search for a free chunk of vm
* space during mmap's.