vsprintf: use WARN_ON_ONCE

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 12 deletions

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d320c1816a7b..73a14b8c6d1f 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1092,13 +1092,8 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 
         /* Reject out-of-range values early.  Large positive sizes are
            used for unknown buffer sizes. */
-        if (unlikely((int) size < 0)) {
-                /* There can be only one.. */
-                static char warn = 1;
-                WARN_ON(warn);
-                warn = 0;
+        if (WARN_ON_ONCE((int) size < 0))
                 return 0;
-        }
 
         str = buf;
         end = buf + size;
@@ -1544,13 +1539,8 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 
         struct printf_spec spec = {0};
 
-        if (unlikely((int) size < 0)) {
-                /* There can be only one.. */
-                static char warn = 1;
-                WARN_ON(warn);
-                warn = 0;
+        if (WARN_ON_ONCE((int) size < 0))
                 return 0;
-        }
 
         str = buf;
         end = buf + size;