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security: use mmap_min_addr indepedently of security models

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This patch removes the dependency of mmap_min_addr on CONFIG_SECURITY.
It also sets a default mmap_min_addr of 4096.

mmapping of addresses below 4096 will only be possible for processes
with CAP_SYS_RAWIO.

Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Eric Paris <eparis@redhat.com>
Looks-ok-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Christoph Lameter
2009-06-03 16:04:31 -04:00
committed by James Morris
parent 7d2948b124
commit e0a94c2a63
7 changed files with 25 additions and 28 deletions
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2
include/linux/mm.h
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@ -580,12 +580,10 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
*/
static inline unsigned long round_hint_to_min(unsigned long hint)
{
#ifdef CONFIG_SECURITY
hint &= PAGE_MASK;
if (((void *)hint != NULL) &&
(hint < mmap_min_addr))
return PAGE_ALIGN(mmap_min_addr);
#endif
return hint;
}