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| author | Luck, Tony <tony.luck@intel.com> | 2010-08-24 11:44:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-24 12:13:20 -0700 |
| commit | 8ca3eb08097f6839b2206e2242db4179aee3cfb3 (patch) | |
| tree | 32b9f033230d615d248fa0bbfa1a0c644a422ed8 /mm/mmap.c | |
| parent | 9559fcdbff4f93d29af04478bbc48294519424f5 (diff) | |
| download | lwn-8ca3eb08097f6839b2206e2242db4179aee3cfb3.tar.gz lwn-8ca3eb08097f6839b2206e2242db4179aee3cfb3.zip | |
guard page for stacks that grow upwards
pa-risc and ia64 have stacks that grow upwards. Check that
they do not run into other mappings. By making VM_GROWSUP
0x0 on architectures that do not ever use it, we can avoid
some unpleasant #ifdefs in check_stack_guard_page().
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 331e51af38c9..6128dc8e5ede 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1716,9 +1716,6 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, uns * PA-RISC uses this for its stack; IA64 for its Register Backing Store. * vma is the last one with address > vma->vm_end. Have to extend vma. */ -#ifndef CONFIG_IA64 -static -#endif int expand_upwards(struct vm_area_struct *vma, unsigned long address) { int error; |