[PATCH] vsprintf: implement %pr to print resource_size_t

[Ingo Molnar]

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 lib/vsprintf.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a013bbc..ddcaa6e 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -581,6 +581,21 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
 	return string(buf, end, sym, field_width, precision, flags);
 }
 
+static char *resource_size_string(char *buf, char *end, resource_size_t *val, int field_width, int precision, int flags)
+{
+	/* room for the actual number, the one "0x", [, ] and the final zero */
+	char sym[2*sizeof(resource_size_t) + 5];
+	char *p = sym, *pend = sym + sizeof(sym);
+	int size = 8;
+
+	*p++ = '[';
+	p = number(p, pend, *val, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+	*p++ = ']';
+	*p = 0;
+
+	return string(buf, end, sym, field_width, precision, flags);
+}
+
 /*
  * Show a '%p' thing.  A kernel extension is that the '%p' is followed
  * by an extra set of alphanumeric characters that are extended format
@@ -592,6 +607,8 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
  * - 'S' For symbolic direct pointers
  * - 'R' For a struct resource pointer, it prints the range of
  *       addresses (not the name nor the flags)
+ * - 'r' For a resource_size_t pointer, it prints the resource
+ *       addresses (in %pR format)
  *
  * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
  * function pointers are really function descriptors, which contain a
@@ -607,6 +624,8 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
 		return symbol_string(buf, end, ptr, field_width, precision, flags);
 	case 'R':
 		return resource_string(buf, end, ptr, field_width, precision, flags);
+	case 'r':
+		return resource_size_string(buf, end, ptr, field_width, precision, flags);
 	}
 	flags |= SMALL;
 	if (field_width == -1) {
@@ -627,6 +646,7 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
  * %pS output the name of a text symbol
  * %pF output the name of a function pointer
  * %pR output the address range in a struct resource
+ * %pr output the address in a pointer to a resource_size_t type
  *
  * The return value is the number of characters which would
  * be generated for the given input, excluding the trailing