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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>
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| .. | ||
| boot | ||
| configs | ||
| kernel | ||
| lib | ||
| mach-bf527 | ||
| mach-bf533 | ||
| mach-bf537 | ||
| mach-bf548 | ||
| mach-bf561 | ||
| mach-common | ||
| mm | ||
| oprofile | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||