lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] mm: ia64 use expand_upwards

Browse Source 
ia64 has expand_backing_store function for growing its Register Backing Store
vma upwards.  But more complete code for this purpose is found in the
CONFIG_STACK_GROWSUP part of mm/mmap.c.  Uglify its #ifdefs further to provide
expand_upwards for ia64 as well as expand_stack for parisc.

The Register Backing Store vma should be marked VM_ACCOUNT.  Implement the
intention of growing it only a page at a time, instead of passing an address
outside of the vma to handle_mm_fault, with unknown consequences.

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
2005-10-29 18:16:20 -07:00
committed by Linus Torvalds
parent f449952bc8
commit 46dea3d092
4 changed files with 24 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/mm.h
View File

@ -896,7 +896,8 @@ void handle_ra_miss(struct address_space *mapping,
unsigned long max_sane_readahead(unsigned long nr);
/* Do stack extension */
extern int expand_stack(struct vm_area_struct * vma, unsigned long address);
extern int expand_stack(struct vm_area_struct *vma, unsigned long address);
extern int expand_upwards(struct vm_area_struct *vma, unsigned long address);
/* Look up the first VMA which satisfies addr < vm_end, NULL if none. */
extern struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long addr);