Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...

[pandora-kernel.git] / lib / dynamic_debug.c

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index b335acb..75ca78f 100644 (file)
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -7,6 +7,7 @@
  * Copyright (C) 2008 Jason Baron <jbaron@redhat.com>
  * By Greg Banks <gnb@melbourne.sgi.com>
  * Copyright (c) 2008 Silicon Graphics Inc.  All Rights Reserved.
+ * Copyright (C) 2011 Bart Van Assche.  All Rights Reserved.
  */
 
 #include <linux/kernel.h>
@@ -27,6 +28,8 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/jump_label.h>
+#include <linux/hardirq.h>
+#include <linux/sched.h>
 
 extern struct _ddebug __start___verbose[];
 extern struct _ddebug __stop___verbose[];
@@ -63,15 +66,25 @@ static inline const char *basename(const char *path)
        return tail ? tail+1 : path;
 }
 
+static struct { unsigned flag:8; char opt_char; } opt_array[] = {
+       { _DPRINTK_FLAGS_PRINT, 'p' },
+       { _DPRINTK_FLAGS_INCL_MODNAME, 'm' },
+       { _DPRINTK_FLAGS_INCL_FUNCNAME, 'f' },
+       { _DPRINTK_FLAGS_INCL_LINENO, 'l' },
+       { _DPRINTK_FLAGS_INCL_TID, 't' },
+};
+
 /* format a string into buf[] which describes the _ddebug's flags */
 static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
                                    size_t maxlen)
 {
        char *p = buf;
+       int i;
 
        BUG_ON(maxlen < 4);
-       if (dp->flags & _DPRINTK_FLAGS_PRINT)
-               *p++ = 'p';
+       for (i = 0; i < ARRAY_SIZE(opt_array); ++i)
+               if (dp->flags & opt_array[i].flag)
+                       *p++ = opt_array[i].opt_char;
        if (p == buf)
                *p++ = '-';
        *p = '\0';
@@ -343,7 +356,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
                               unsigned int *maskp)
 {
        unsigned flags = 0;
-       int op = '=';
+       int op = '=', i;
 
        switch (*str) {
        case '+':
@@ -358,13 +371,14 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
                printk(KERN_INFO "%s: op='%c'\n", __func__, op);
 
        for ( ; *str ; ++str) {
-               switch (*str) {
-               case 'p':
-                       flags |= _DPRINTK_FLAGS_PRINT;
-                       break;
-               default:
-                       return -EINVAL;
+               for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
+                       if (*str == opt_array[i].opt_char) {
+                               flags |= opt_array[i].flag;
+                               break;
+                       }
                }
+               if (i < 0)
+                       return -EINVAL;
        }
        if (flags == 0)
                return -EINVAL;
@@ -413,6 +427,35 @@ static int ddebug_exec_query(char *query_string)
        return 0;
 }
 
+int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
+{
+       va_list args;
+       int res;
+
+       BUG_ON(!descriptor);
+       BUG_ON(!fmt);
+
+       va_start(args, fmt);
+       res = printk(KERN_DEBUG);
+       if (descriptor->flags & _DPRINTK_FLAGS_INCL_TID) {
+               if (in_interrupt())
+                       res += printk(KERN_CONT "<intr> ");
+               else
+                       res += printk(KERN_CONT "[%d] ", task_pid_vnr(current));
+       }
+       if (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME)
+               res += printk(KERN_CONT "%s:", descriptor->modname);
+       if (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
+               res += printk(KERN_CONT "%s:", descriptor->function);
+       if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
+               res += printk(KERN_CONT "%d ", descriptor->lineno);
+       res += vprintk(fmt, args);
+       va_end(args);
+
+       return res;
+}
+EXPORT_SYMBOL(__dynamic_pr_debug);
+
 static __initdata char ddebug_setup_string[1024];
 static __init int ddebug_setup_query(char *str)
 {