diff options
| author | Hugh Dickins <hughd@google.com> | 2013-04-30 02:07:44 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 02:54:34 +0400 |
| commit | 6ee8630e02be6dd89926ca0fbc21af68b23dc087 (patch) | |
| tree | 04c4cb8546541d59dac8d92ac1c7d7ee03ddc362 /Documentation | |
| parent | acb6d558f4c8fbacc8e774c9d7737220a3777882 (diff) | |
| download | linux-6ee8630e02be6dd89926ca0fbc21af68b23dc087.tar.xz | |
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()).
[catalin.marinas@arm.com: commit log; shift_arg_pages(), asm-generic/pgtables.h changes]
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: <stable@vger.kernel.org> [3.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions