[PATCH] freepgt: remove MM_VM_SIZE(mm)
authorHugh Dickins <hugh@veritas.com>
Tue, 19 Apr 2005 20:29:15 +0000 (13:29 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org.(none)>
Tue, 19 Apr 2005 20:29:15 +0000 (13:29 -0700)
commitee39b37b23da0b6ec53a8ebe90ff41c016f8ae27
tree4af606913ab8f95551623b788c0c66c1f5902229
parente0da382c92626ad1d7f4b7527d19b80104d67a83
[PATCH] freepgt: remove MM_VM_SIZE(mm)

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>
include/asm-ia64/processor.h
include/asm-ppc64/processor.h
include/asm-s390/processor.h
include/linux/mm.h
mm/memory.c
mm/mmap.c