s390/kdump: Account /sys/kernel/kexec_crash_size changes in OS info

The crashkernel size for kdump can be reduced at runtime with the
sysfs file "/sys/kernel/kexec_crash_size". Currently those changes
do not update the OS info crashkernel information that is used
for stand-alone kdump. With this fix now also the OS info crashkernel
information is updated correctly.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index bdad47d544783d89fa015ee6db34d52a2a555695..03d2027d656a13b8c3f4607aa830e822a9aa51e3 100644 (file)
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -24,6 +24,7 @@
 #include <asm/ipl.h>
 #include <asm/diag.h>
 #include <asm/asm-offsets.h>
+#include <asm/os_info.h>
 
 typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
 
@@ -114,8 +115,13 @@ static void crash_map_pages(int enable)
               size % KEXEC_CRASH_MEM_ALIGN);
        if (enable)
                vmem_add_mapping(crashk_res.start, size);
-       else
+       else {
                vmem_remove_mapping(crashk_res.start, size);
+               if (size)
+                       os_info_crashkernel_add(crashk_res.start, size);
+               else
+                       os_info_crashkernel_add(0, 0);
+       }
 }
 
 /*