s390/debugfs: introduce top-level 's390' directory

Introduce a top-level 's390' directory which should be used when
adding new s390 specific debug feature files and/or directories.

This makes hopefully sure that the contents of the s390 directory will
be a bit more structured. Right now we have a couple of top-level
files where it is not easy to tell to which subsystem they belong to.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 08e7924ea2f98326fdbb9cf85e520ddbbe729577..adb3fe2e3d42df72bba0586bc5254f087bb13845 100644 (file)
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -56,7 +56,7 @@ obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
 obj-y  += debug.o irq.o ipl.o dis.o diag.o vdso.o als.o
 obj-y  += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
 obj-y  += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o
-obj-y  += entry.o reipl.o relocate_kernel.o
+obj-y  += entry.o reipl.o relocate_kernel.o kdebugfs.o
 
 extra-y                                += head.o head64.o vmlinux.lds
 

diff --git a/arch/s390/kernel/kdebugfs.c b/arch/s390/kernel/kdebugfs.c
new file mode 100644 (file)
index 0000000..ee85e17
--- /dev/null
+++ b/arch/s390/kernel/kdebugfs.c
@@ -0,0 +1,15 @@
+#include <linux/debugfs.h>
+#include <linux/export.h>
+#include <linux/init.h>
+
+struct dentry *arch_debugfs_dir;
+EXPORT_SYMBOL(arch_debugfs_dir);
+
+static int __init arch_kdebugfs_init(void)
+{
+       arch_debugfs_dir = debugfs_create_dir("s390", NULL);
+       if (IS_ERR(arch_debugfs_dir))
+               arch_debugfs_dir = NULL;
+       return 0;
+}
+postcore_initcall(arch_kdebugfs_init);