MIPS: Octeon: Don't clobber bootloader data structures.
authorDavid Daney <david.daney@cavium.com>
Wed, 12 Jun 2013 17:28:33 +0000 (17:28 +0000)
committerRalf Baechle <ralf@linux-mips.org>
Fri, 21 Jun 2013 16:07:01 +0000 (18:07 +0200)
commitd949b4fe6d23dd92b5fa48cbf7af90ca32beed2e
tree4bb1fb9476533e1db8e9f5fc9fd8055bd476bb4a
parent4f675e8a6b338ff6ac510595649c647d4888576e
MIPS: Octeon: Don't clobber bootloader data structures.

Commit abe77f90dc (MIPS: Octeon: Add kexec and kdump support) added a
bootmem region for the kernel image itself.  The problem is that this
is rounded up to a 0x100000 boundary, which is memory that may not be
owned by the kernel.  Depending on the kernel's configuration based
size, this 'extra' memory may contain data passed from the bootloader
to the kernel itself, which if clobbered makes the kernel crash in
various ways.

The fix: Quit rounding the size up, so that we only use memory
assigned to the kernel.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: <stable@vger.kernel.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5449/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/cavium-octeon/setup.c