Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 30 insertions, 4 deletions

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 8e75003d62f..abbabec9720 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -17,7 +17,7 @@
  */
 
 #include <stdarg.h>
-#include <linux/module.h>
+#include <linux/module.h>	/* for KSYM_SYMBOL_LEN */
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
@@ -212,6 +212,26 @@ char *put_dec(char *buf, unsigned long long num)
 	}
 }
 
+/*
+ * Convert passed number to decimal string.
+ * Returns the length of string.  On buffer overflow, returns 0.
+ *
+ * If speed is not important, use snprintf(). It's easy to read the code.
+ */
+int num_to_str(char *buf, int size, unsigned long long num)
+{
+	char tmp[21];		/* Enough for 2^64 in decimal */
+	int idx, len;
+
+	len = put_dec(tmp, num) - tmp;
+
+	if (len > size)
+		return 0;
+	for (idx = 0; idx < len; ++idx)
+		buf[idx] = tmp[len - idx - 1];
+	return  len;
+}
+
 #define ZEROPAD	1		/* pad with zero */
 #define SIGN	2		/* unsigned/signed long */
 #define PLUS	4		/* show plus */
@@ -891,9 +911,15 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 	case 'U':
 		return uuid_string(buf, end, ptr, spec, fmt);
 	case 'V':
-		return buf + vsnprintf(buf, end > buf ? end - buf : 0,
-				       ((struct va_format *)ptr)->fmt,
-				       *(((struct va_format *)ptr)->va));
+		{
+			va_list va;
+
+			va_copy(va, *((struct va_format *)ptr)->va);
+			buf += vsnprintf(buf, end > buf ? end - buf : 0,
+					 ((struct va_format *)ptr)->fmt, va);
+			va_end(va);
+			return buf;
+		}
 	case 'K':
 		/*
 		 * %pK cannot be used in IRQ context because its test