Commit e2e7e093 authored Aug 10, 2010 by Anton Blanchard Committed by Linus Torvalds Aug 11, 2010

lib/bug.c: make WARN implementation match the kernel/panic.c one



There are a few issues with the exception based WARN implementation in
lib/bug.c:

- Inconsistent printk flags. The "cut here" line is printed at KERN_EMERG, so
  the console and all logged in users see the single line:

------------[ cut here ]------------

  for each WARN. Fix this so we print everything at KERN_WARNING to match the
  kernel/panic.c version.

- The lib/bug.c WARN would print "Badness at". Change it to match the
  kernel/panic.c version which prints "WARNING: at".

- Print the list of modules, similar to kernel/panic.c of modules, similar to
  kernel/panic.c

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent c7ff0d9c

lib/bug.c

+7 −4

Original line number	Diff line number	Diff line
		@@ -136,8 +136,6 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)

		bug = find_bug(bugaddr);

		printk(KERN_EMERG "------------[ cut here ]------------\n");

		file = NULL;
		line = 0;
		warning = 0;
		@@ -156,19 +154,24 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)

		if (warning) {
		/* this is a WARN_ON rather than BUG/BUG_ON */
		printk(KERN_WARNING "------------[ cut here ]------------\n");

		if (file)
		printk(KERN_ERR "Badness at %s:%u\n",
		printk(KERN_WARNING "WARNING: at %s:%u\n",
		file, line);
		else
		printk(KERN_ERR "Badness at %p "
		printk(KERN_WARNING "WARNING: at %p "
		"[verbose debug info unavailable]\n",
		(void *)bugaddr);

		print_modules();
		show_regs(regs);
		add_taint(BUG_GET_TAINT(bug));
		return BUG_TRAP_TYPE_WARN;
		}

		printk(KERN_EMERG "------------[ cut here ]------------\n");

		if (file)
		printk(KERN_CRIT "kernel BUG at %s:%u!\n",
		file, line);