ARM: 7701/1: mm: Allow arch code to control the user page table ceiling

On architectures where a pgd entry may be shared between user and kernel
(e.g. ARM+LPAE), freeing page tables needs a ceiling other than 0. This
patch introduces a generic USER_PGTABLES_CEILING that arch code can
override. It is the responsibility of the arch code setting the ceiling
to ensure the complete freeing of the page tables (usually in
pgd_free()).

[[email protected]: commit log; shift_arg_pages(), asm-generic/pgtables.h changes]

Signed-off-by: Hugh Dickins <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: <[email protected]> # 3.3+
Signed-off-by: Russell King <[email protected]>

0 files changed, 0 insertions, 0 deletions