[PATCH 1/3] lib/vsprintf: Prepare for more general use of ptr_to_id()

[Geert Uytterhoeven <geert+renesas@glider.be>]

  - Make the ptr argument const, to avoid adding casts in future
    callers,
  - Add a forward declaration, to avoid moving large blocks of code.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 lib/vsprintf.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 095a677f89c02442..b5bf90731c5a5277 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -407,6 +407,9 @@ struct printf_spec {
 #define FIELD_WIDTH_MAX ((1 << 23) - 1)
 #define PRECISION_MAX ((1 << 15) - 1)
 
+static char *ptr_to_id(char *buf, char *end, const void *ptr,
+		       struct printf_spec spec);
+
 static noinline_for_stack
 char *number(char *buf, char *end, unsigned long long num,
 	     struct printf_spec spec)
@@ -1714,7 +1717,8 @@ static int __init initialize_ptr_random(void)
 early_initcall(initialize_ptr_random);
 
 /* Maps a pointer to a 32 bit unique identifier. */
-static char *ptr_to_id(char *buf, char *end, void *ptr, struct printf_spec spec)
+static char *ptr_to_id(char *buf, char *end, const void *ptr,
+		       struct printf_spec spec)
 {
 	const char *str = sizeof(ptr) == 8 ? "(____ptrval____)" : "(ptrval)";
 	unsigned long hashval;
-- 
2.17.1