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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2008-04-07 23:30:10 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-04-07 23:30:10 +0200 |
| commit | c976816b6e901341ec3c4653147316c15549a1c4 (patch) | |
| tree | aa41c4377d05d78bdeb09c64e73fea82602885f4 /ipc/compat_mq.c | |
| parent | 950b0d28378c4ee63a30dad732a8319c8a41c95d (diff) | |
siimage: fix kernel oops on PPC 44x
Fix kernel oops due to machine check occuring in init_chipset_siimage() on PPC
44x platforms. These 32-bit CPUs have 36-bit physical address and PCI I/O and
memory spaces are mapped beyond 4 GB; arch/ppc/ code has a fixup in ioremap()
that creates an illusion of the PCI I/O and memory resources being mapped below
4 GB, while arch/powerpc/ code got rid of this fixup with PPC 44x having instead
CONFIG_RESOURCES_64BIT=y -- this causes the resources to be truncated to 32-bit
'unsigned long' type in this driver, and so non-existant memory being ioremap'ed
and then accessed...
Thanks to Valentine Barshak for providing an initial patch and explanations.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'ipc/compat_mq.c')
0 files changed, 0 insertions, 0 deletions