sh: provide generic arch_debugfs_dir.

While sh previously had its own debugfs root, there now exists a
common arch_debugfs_dir prototype, so we switch everything over to
that. Presumably once more architectures start making use of this
we'll be able to just kill off the stub kdebugfs wrapper.

Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/include/asm/system.h

···
 extern unsigned long cached_to_uncached;
 extern unsigned long uncached_size;
 
-extern struct dentry *sh_debugfs_root;
-
 void per_cpu_trap_init(void);
 void default_idle(void);
 void cpu_idle_wait(void);

arch/sh/kernel/Makefile

···
 CFLAGS_REMOVE_return_address.o = -pg
 
 obj-y	:= clkdev.o debugtraps.o dma-nommu.o dumpstack.o 		\
-	   idle.o io.o irq.o						\
-	   irq_$(BITS).o machvec.o nmi_debug.o process.o		\
+	   idle.o io.o irq.o irq_$(BITS).o kdebugfs.o			\
+	   machvec.o nmi_debug.o process.o				\
 	   process_$(BITS).o ptrace.o ptrace_$(BITS).o			\
 	   reboot.o return_address.o					\
 	   setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o		\

arch/sh/kernel/kdebugfs.c

···
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/debugfs.h>
+
+struct dentry *arch_debugfs_dir;
+EXPORT_SYMBOL(arch_debugfs_dir);
+
+static int __init arch_kdebugfs_init(void)
+{
+	arch_debugfs_dir = debugfs_create_dir("sh", NULL);
+	if (!arch_debugfs_dir)
+		return -ENOMEM;
+
+	return 0;
+}
+arch_initcall(arch_kdebugfs_init);

arch/sh/kernel/setup.c

···
 #include <linux/module.h>
 #include <linux/smp.h>
 #include <linux/err.h>
-#include <linux/debugfs.h>
 #include <linux/crash_dump.h>
 #include <linux/mmzone.h>
 #include <linux/clk.h>
···
 	.show	= show_cpuinfo,
 };
 #endif /* CONFIG_PROC_FS */
-
-struct dentry *sh_debugfs_root;
-
-static int __init sh_debugfs_init(void)
-{
-	sh_debugfs_root = debugfs_create_dir("sh", NULL);
-	if (!sh_debugfs_root)
-		return -ENOMEM;
-	if (IS_ERR(sh_debugfs_root))
-		return PTR_ERR(sh_debugfs_root);
-
-	return 0;
-}
-arch_initcall(sh_debugfs_init);

arch/sh/mm/asids-debugfs.c

···
 {
 	struct dentry *asids_dentry;
 
-	asids_dentry = debugfs_create_file("asids", S_IRUSR, sh_debugfs_root,
+	asids_dentry = debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir,
 					   NULL, &asids_debugfs_fops);
 	if (!asids_dentry)
 		return -ENOMEM;

arch/sh/mm/cache-debugfs.c

···
 {
 	struct dentry *dcache_dentry, *icache_dentry;
 
-	dcache_dentry = debugfs_create_file("dcache", S_IRUSR, sh_debugfs_root,
+	dcache_dentry = debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir,
 					    (unsigned int *)CACHE_TYPE_DCACHE,
 					    &cache_debugfs_fops);
 	if (!dcache_dentry)
 		return -ENOMEM;
-	if (IS_ERR(dcache_dentry))
-		return PTR_ERR(dcache_dentry);
 
-	icache_dentry = debugfs_create_file("icache", S_IRUSR, sh_debugfs_root,
+	icache_dentry = debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir,
 					    (unsigned int *)CACHE_TYPE_ICACHE,
 					    &cache_debugfs_fops);
 	if (!icache_dentry) {
 		debugfs_remove(dcache_dentry);
 		return -ENOMEM;
-	}
-	if (IS_ERR(icache_dentry)) {
-		debugfs_remove(dcache_dentry);
-		return PTR_ERR(icache_dentry);
 	}
 
 	return 0;

arch/sh/mm/pmb.c

···
 	struct dentry *dentry;
 
 	dentry = debugfs_create_file("pmb", S_IFREG | S_IRUGO,
-				     sh_debugfs_root, NULL, &pmb_debugfs_fops);
+				     arch_debugfs_dir, NULL, &pmb_debugfs_fops);
 	if (!dentry)
 		return -ENOMEM;
-	if (IS_ERR(dentry))
-		return PTR_ERR(dentry);
 
 	return 0;
 }

arch/sh/mm/tlb-debugfs.c

···
 {
 	struct dentry *itlb, *utlb;
 
-	itlb = debugfs_create_file("itlb", S_IRUSR, sh_debugfs_root,
+	itlb = debugfs_create_file("itlb", S_IRUSR, arch_debugfs_dir,
 				   (unsigned int *)TLB_TYPE_ITLB,
 				   &tlb_debugfs_fops);
 	if (unlikely(!itlb))
 		return -ENOMEM;
-	if (IS_ERR(itlb))
-		return PTR_ERR(itlb);
 
-	utlb = debugfs_create_file("utlb", S_IRUSR, sh_debugfs_root,
+	utlb = debugfs_create_file("utlb", S_IRUSR, arch_debugfs_dir,
 				   (unsigned int *)TLB_TYPE_UTLB,
 				   &tlb_debugfs_fops);
 	if (unlikely(!utlb)) {
 		debugfs_remove(itlb);
 		return -ENOMEM;
-	}
-
-	if (IS_ERR(utlb)) {
-		debugfs_remove(itlb);
-		return PTR_ERR(utlb);
 	}
 
 	return 0;