ALSA: usb-audio: add UAC2 sepecific Feature Unit controls

[safe/jmp/linux-2.6] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 3e162d8..444b770 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -33,6 +33,7 @@
 #include <linux/bootmem.h>
 #include <linux/syscalls.h>
 #include <linux/kexec.h>
+#include <linux/kdb.h>
 #include <linux/ratelimit.h>
 #include <linux/kmsg_dump.h>
 #include <linux/syslog.h>
@@ -70,8 +71,6 @@ int console_printk[4] = {
        DEFAULT_CONSOLE_LOGLEVEL,       /* default_console_loglevel */
 };
 
-static int saved_console_loglevel = -1;
-
 /*
  * Low level drivers may need that to know if they can schedule in
  * their unblank() callback or not. So let's export it.
@@ -146,6 +145,7 @@ static char __log_buf[__LOG_BUF_LEN];
 static char *log_buf = __log_buf;
 static int log_buf_len = __LOG_BUF_LEN;
 static unsigned logged_chars; /* Number of chars produced since last read+clear operation */
+static int saved_console_loglevel = -1;
 
 #ifdef CONFIG_KEXEC
 /*
@@ -414,6 +414,22 @@ SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len)
        return do_syslog(type, buf, len, SYSLOG_FROM_CALL);
 }
 
+#ifdef CONFIG_KGDB_KDB
+/* kdb dmesg command needs access to the syslog buffer.  do_syslog()
+ * uses locks so it cannot be used during debugging.  Just tell kdb
+ * where the start and end of the physical and logical logs are.  This
+ * is equivalent to do_syslog(3).
+ */
+void kdb_syslog_data(char *syslog_data[4])
+{
+       syslog_data[0] = log_buf;
+       syslog_data[1] = log_buf + log_buf_len;
+       syslog_data[2] = log_buf + log_end -
+               (logged_chars < log_buf_len ? logged_chars : log_buf_len);
+       syslog_data[3] = log_buf + log_end;
+}
+#endif /* CONFIG_KGDB_KDB */
+
 /*
  * Call the console drivers on a range of log_buf
  */
@@ -587,6 +603,14 @@ asmlinkage int printk(const char *fmt, ...)
        va_list args;
        int r;
 
+#ifdef CONFIG_KGDB_KDB
+       if (unlikely(kdb_trap_printk)) {
+               va_start(args, fmt);
+               r = vkdb_printf(fmt, args);
+               va_end(args);
+               return r;
+       }
+#endif
        va_start(args, fmt);
        r = vprintk(fmt, args);
        va_end(args);
@@ -1461,6 +1485,7 @@ EXPORT_SYMBOL_GPL(kmsg_dump_unregister);
 static const char const *kmsg_reasons[] = {
        [KMSG_DUMP_OOPS]        = "oops",
        [KMSG_DUMP_PANIC]       = "panic",
+       [KMSG_DUMP_KEXEC]       = "kexec",
 };
 
 static const char *kmsg_to_str(enum kmsg_dump_reason reason)