hugetlb: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions

Add a flag for mmap that will be used to request a huge page region that
will look like anonymous memory to userspace.  This is accomplished by
using a file on the internal vfsmount.  MAP_HUGETLB is a modifier of
MAP_ANONYMOUS and so must be specified with it.  The region will behave
the same as a MAP_ANONYMOUS region using small pages.

[[email protected]: fix arch definitions of MAP_HUGETLB]
Signed-off-by: Eric B Munson <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Adam Litke <[email protected]>
Cc: David Gibson <[email protected]>
Cc: Lee Schermerhorn <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions