kdb,debug_core: adjust master cpu switch logic against new debug_core locking
authorJason Wessel <jason.wessel@windriver.com>
Fri, 21 May 2010 13:46:00 +0000 (08:46 -0500)
committerJason Wessel <jason.wessel@windriver.com>
Fri, 22 Oct 2010 20:34:13 +0000 (15:34 -0500)
commit495363d380b4f4745bd8677912688654afc44020
tree647032c22f9e77f91578dcae864776849dbcbfa8
parentdfee3a7b92208b30f77876068aece9ea571270c2
kdb,debug_core: adjust master cpu switch logic against new debug_core locking

The kdb shell needs to enforce switching back to the original CPU that
took the exception before restoring normal kernel execution.  Resuming
from a different CPU than what took the original exception will cause
problems with spin locks that are freed from the a different processor
than had taken the lock.

The special logic in dbg_cpu_switch() can go away entirely with
because the state of what cpus want to be masters or slaves will
remain unchanged between entry and exit of the debug_core exception
context.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
kernel/debug/debug_core.c
kernel/debug/kdb/kdb_debugger.c
kernel/debug/kdb/kdb_main.c