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| author | Matt Fleming <matt@console-pimps.org> | 2010-03-28 20:08:25 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-03-29 12:11:51 +0900 |
| commit | 4bea3418c737891894b9d3d3e9f8bbd67d66fa38 (patch) | |
| tree | cf3fe1db70b786b26f0b4b7334bfd73565988725 /fs/sync.c | |
| parent | d5ab780305bb6d60a7b5a74f18cf84eb6ad153b1 (diff) | |
| download | linux-3.10-4bea3418c737891894b9d3d3e9f8bbd67d66fa38.tar.gz linux-3.10-4bea3418c737891894b9d3d3e9f8bbd67d66fa38.tar.bz2 linux-3.10-4bea3418c737891894b9d3d3e9f8bbd67d66fa38.zip | |
sh: Enable the mmu in start_secondary()
For the boot, enable_mmu() is called from setup_arch() but we don't call
setup_arch() for any of the other cpus. So turn on the non-boot cpu's
mmu inside of start_secondary().
I noticed this bug on an SMP board when trying to map I/O memory
(smsc911x registers) into the kernel address space. Since the Address
Translation bit in MMUCR wasn't set, accessing the virtual address where
the smsc911x registers were supposedly mapped actually performed a
physical address access.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Cc: stable@kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'fs/sync.c')
0 files changed, 0 insertions, 0 deletions