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authorChangli Gao <xiaosuo@gmail.com>2010-10-26 14:22:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-26 16:52:16 -0700
commitb903c0b8899b46829a9b80ba55b61079b35940ec (patch)
treec5fd68065bf1fe9d89c08d979fccfea4b78ba4f4 /lib/vsprintf.c
parent5e0579812834ab7fa072db4a15ebdff68d62e2e7 (diff)
downloadlinux-b903c0b8899b46829a9b80ba55b61079b35940ec.tar.gz
lib: fix scnprintf() if @size is == 0
scnprintf() should return 0 if @size is == 0. Update the comment for it, as @size is unsigned. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 8378c136b6e..c150d3dafff 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1504,7 +1504,7 @@ EXPORT_SYMBOL(snprintf);
* @...: Arguments for the format string
*
* The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0.
+ * the trailing '\0'. If @size is == 0 the function returns 0.
*/
int scnprintf(char *buf, size_t size, const char *fmt, ...)
@@ -1516,7 +1516,11 @@ int scnprintf(char *buf, size_t size, const char *fmt, ...)
i = vsnprintf(buf, size, fmt, args);
va_end(args);
- return (i >= size) ? (size - 1) : i;
+ if (likely(i < size))
+ return i;
+ if (size != 0)
+ return size - 1;
+ return 0;
}
EXPORT_SYMBOL(scnprintf);