diff options
| -rw-r--r-- | xen/common/bitmap.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/xen/common/bitmap.c b/xen/common/bitmap.c index 363572bedb..a34f519359 100644 --- a/xen/common/bitmap.c +++ b/xen/common/bitmap.c @@ -363,9 +363,8 @@ static inline int bscnl_emit(char *buf, int buflen, int rbot, int rtop, int len) * the range. Output format is compatible with the format * accepted as input by bitmap_parselist(). * - * The return value is the number of characters which would be - * generated for the given input, excluding the trailing '\0', as - * per ISO C99. + * The return value is the number of characters which were output, + * excluding the trailing '\0'. */ int bitmap_scnlistprintf(char *buf, unsigned int buflen, const unsigned long *maskp, int nmaskbits) @@ -383,6 +382,8 @@ int bitmap_scnlistprintf(char *buf, unsigned int buflen, rbot = cur; } } + if (!len && buflen) + *buf = 0; return len; } EXPORT_SYMBOL(bitmap_scnlistprintf); |