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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-03-02 09:47:13 +0100 |
|---|---|---|
| committer | Jeff Vander Stoep <jeffv@google.com> | 2016-09-22 13:38:22 -0700 |
| commit | f41890295d6496ed50bbe8606d23fb10661a844f (patch) | |
| tree | 442fdb58f71907db685e0b0451943e38d0bbd0c6 /arch/m32r/lib/usercopy.c | |
| parent | 1c4143d40cec48cac343bf1e8a426746ac240f92 (diff) | |
UPSTREAM: arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly
Commit 8439e62a1561 ("arm64: mm: use bit ops rather than arithmetic in
pa/va translations") changed the boundary check against PAGE_OFFSET from
an arithmetic comparison to a bit test. This means we now silently assume
that PAGE_OFFSET is a power of 2 that divides the kernel virtual address
space into two equal halves. So make that assumption explicit.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Bug: 30369029
Patchset: kaslr-arm64-4.4
(cherry picked from commit 6d2aa549de1fc998581d216de3853aa131aa4446)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I8c3bc8cdb7d7f7dea092fd1a208b04583a141054
Diffstat (limited to 'arch/m32r/lib/usercopy.c')
0 files changed, 0 insertions, 0 deletions