Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: (29 commits)
  sh: Fixup SH-2 BUG() trap handling.
  sh: Use early_param() for earlyprintk parsing.
  sh: Fix .empty_zero_page alignment for PAGE_SIZE > 4096.
  sh: Fixup .data.page_aligned.
  sh: Hook up SH7722 scif ipr interrupts.
  sh: Fixup sh_bios() trap handling.
  sh: SH-MobileR SH7722 CPU support.
  sh: Fixup dma_cache_sync() callers.
  sh: Convert remaining remap_area_pages() users to ioremap_page_range().
  sh: Fixup kernel_execve() for syscall cleanups.
  sh: Fix get_wchan().
  sh: BUG() handling through trapa vector.
  rtc: rtc-sh: alarm support.
  rtc: rtc-sh: fix rtc for out-by-one for the month.
  sh: Kill off unused SE7619 I/O ops.
  serial: sh-sci: Shut up various sci_rxd_in() gcc4 warnings.
  sh: Split out atomic ops logically.
  sh: Fix Solution Engine 7619 build.
  sh: Trivial build fixes for SH-2 support.
  sh: IPR IRQ updates for SH7619/SH7206.
  ...

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index 3762d9dc204..ec110157992 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -19,6 +19,7 @@
 #include <linux/kallsyms.h>
 #include <linux/io.h>
 #include <linux/debug_locks.h>
+#include <linux/limits.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
 
@@ -129,6 +130,40 @@ static int die_if_no_fixup(const char * str, struct pt_regs * regs, long err)
 	return -EFAULT;
 }
 
+#ifdef CONFIG_BUG
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+static inline void do_bug_verbose(struct pt_regs *regs)
+{
+	struct bug_frame f;
+	long len;
+
+	if (__copy_from_user(&f, (const void __user *)regs->pc,
+			     sizeof(struct bug_frame)))
+		return;
+
+	len = __strnlen_user(f.file, PATH_MAX) - 1;
+	if (unlikely(len < 0 || len >= PATH_MAX))
+		f.file = "<bad filename>";
+	len = __strnlen_user(f.func, PATH_MAX) - 1;
+	if (unlikely(len < 0 || len >= PATH_MAX))
+		f.func = "<bad function>";
+
+	printk(KERN_ALERT "kernel BUG in %s() at %s:%d!\n",
+	       f.func, f.file, f.line);
+}
+#else
+static inline void do_bug_verbose(struct pt_regs *regs)
+{
+}
+#endif /* CONFIG_DEBUG_BUGVERBOSE */
+#endif /* CONFIG_BUG */
+
+void handle_BUG(struct pt_regs *regs)
+{
+	do_bug_verbose(regs);
+	die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff);
+}
+
 /*
  * handle an instruction that does an unaligned memory access by emulating the
  * desired behaviour