h8300: GENERIC_BUG support

CONFIG_GENERIC_BUG support.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/h8300/Kconfig

@@ -62,6 +62,10 @@ config GENERIC_TIME
 	bool
 	default y
 
+config GENERIC_BUG
+        bool
+        depends on BUG
+
 config TIME_LOW_RES
 	bool
 	default y

arch/h8300/include/asm/bug.h

 #ifndef _H8300_BUG_H
 #define _H8300_BUG_H
+
+/* always true */
+#define is_valid_bugaddr(addr) (1)
+
 #include <asm-generic/bug.h>
 #endif

arch/h8300/include/asm/system.h

@@ -155,4 +155,6 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz
 
 #define arch_align_stack(x) (x)
 
+void die(char *str, struct pt_regs *fp, unsigned long err);
+
 #endif /* _H8300_SYSTEM_H */

arch/h8300/kernel/module.c

@@ -114,9 +114,10 @@ int module_finalize(const Elf_Ehdr *hdr,
 		    const Elf_Shdr *sechdrs,
 		    struct module *me)
 {
-	return 0;
+	return module_bug_finalize(hdr, sechdrs, me);
 }
 
 void module_arch_cleanup(struct module *mod)
 {
+	module_bug_cleanup(mod);
 }

arch/h8300/kernel/traps.c

@@ -20,12 +20,14 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/bug.h>
 
 #include <asm/system.h>
 #include <asm/irq.h>
 #include <asm/traps.h>
 #include <asm/page.h>
-#include <asm/gpio.h>
+
+static DEFINE_SPINLOCK(die_lock);
 
 /*
  * this must be called very early as the kernel might
@@ -94,16 +96,19 @@ static void dump(struct pt_regs *fp)
 	printk("\n\n");
 }
 
-void die_if_kernel (char *str, struct pt_regs *fp, int nr)
+void die(char *str, struct pt_regs *fp, unsigned long err)
 {
-	extern int console_loglevel;
+	static int diecount;
 
-	if (!(fp->ccr & PS_S))
-		return;
+	oops_enter();
 
-	console_loglevel = 15;
+	console_verbose();
+	spin_lock_irq(&die_lock);
+	report_bug(fp->pc, fp);
+	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
 	dump(fp);
 
+	spin_unlock_irq(&die_lock);
 	do_exit(SIGSEGV);
 }
 

arch/h8300/mm/fault.c

@@ -20,8 +20,6 @@
 #include <asm/system.h>
 #include <asm/pgtable.h>
 
-extern void die_if_kernel(char *, struct pt_regs *, long);
-
 /*
  * This routine handles page faults.  It determines the problem, and
  * then passes it off to one of the appropriate routines.
@@ -50,7 +48,8 @@ asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
 	} else
 		printk(KERN_ALERT "Unable to handle kernel access");
 	printk(" at virtual address %08lx\n",address);
-	die_if_kernel("Oops", regs, error_code);
+	if (!user_mode(regs))
+		die("Oops", regs, error_code);
 	do_exit(SIGKILL);
 
 	return 1;