diff options
| author | Bernd Schmidt <bernds_cb1@t-online.de> | 2008-04-24 02:56:36 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-04-24 02:56:36 +0800 |
| commit | d56daae9bec92ae4b0c115db787a0fcc4c17b381 (patch) | |
| tree | 502be06afc9116fa993807a758a998c23fc8d14a /arch/blackfin/kernel/process.c | |
| parent | 697a9d65aa799940da1c9145944c6b9bd0f442c5 (diff) | |
[Blackfin] arch: fix bug - a crash on bootup with CONFIG_MPU on the BF548
The function flush_switched_dcplbs was clearing the CPLB entries covering
the process permission bitmasks. This means that the sequence
flush_switched_dcplbs ();
set_mask_dcplbs(mm->context.page_rwx_mask);
has a problem: if kernel code (such as an interrupt) causes a CPLB miss before
set_mask_dcplbs completes, the CPLB handler function causes a double fault,
with an instantaneous reboot.
This bug fix is dedicated to Michael Hennerich, the only person in the world
capable of providing working JTAG hardware.
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel/process.c')
0 files changed, 0 insertions, 0 deletions