[S390] zfcpdump support.
s390 machines provide hardware support for creating Linux dumps on SCSI
disks. For creating a dump a special purpose dump Linux is used. The first
32 MB of memory are saved by the hardware before the dump Linux is
booted. Via an SCLP interface, the saved memory can be accessed from
Linux. This patch exports memory and registers of the crashed Linux to
userspace via a debugfs file. For more information refer to
Documentation/s390/zfcpdump.txt, which is included in this patch.
Signed-off-by: Michael Holzheu <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index b957e4c..676e94e 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -119,4 +119,5 @@
#define smp_setup_cpu_possible_map() do { } while (0)
#endif
+extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
#endif
