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author | Hugh Dickins <hughd@google.com> | 2013-04-29 15:07:44 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 15:54:34 -0700 |
commit | 6ee8630e02be6dd89926ca0fbc21af68b23dc087 (patch) | |
tree | 04c4cb8546541d59dac8d92ac1c7d7ee03ddc362 /block | |
parent | acb6d558f4c8fbacc8e774c9d7737220a3777882 (diff) | |
download | op-kernel-dev-6ee8630e02be6dd89926ca0fbc21af68b23dc087.zip op-kernel-dev-6ee8630e02be6dd89926ca0fbc21af68b23dc087.tar.gz |
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 'block')
0 files changed, 0 insertions, 0 deletions