diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-12-27 11:27:22 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-12-27 11:27:13 +0100 |
| commit | 85ac7ca5972d63d23aa5ea75c3834a33b951f89d (patch) | |
| tree | 851ff1a5500bce5964336960594cb72bff369d13 /arch/s390/include | |
| parent | 3a3954ceae756ed2a5d53b45c67db6dde3c0c126 (diff) | |
[S390] outstanding interrupts vs. smp_send_stop
The panic function will first print the panic message to the console,
then stop additional cpus with smp_send_stop and finally call the
function on the panic notifier list.
In case of an I/O based console the panic message will cause I/O to
be started and a function on the panic notifier list will wait for the
completion of the I/O. That does not work if an I/O completion interrupt
has already been delivered to a cpu that is then stopped by smp_send_stop.
To break this cyclic dependency add code to smp_send_stop that gives
the additional cpu the opportunity to complete outstanding interrupts.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/sigp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/sigp.h b/arch/s390/include/asm/sigp.h index e3bffd4e2d66..7040b8567cd0 100644 --- a/arch/s390/include/asm/sigp.h +++ b/arch/s390/include/asm/sigp.h @@ -56,6 +56,7 @@ enum { ec_schedule = 0, ec_call_function, ec_call_function_single, + ec_stop_cpu, }; /* |