diff options
Diffstat (limited to 'lib/bitmap.c')
| -rw-r--r-- | lib/bitmap.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 0d4a127dd9b3..06f7e4fe8d2d 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -5,11 +5,13 @@ * This source code is licensed under the GNU General Public License, * Version 2. See the file COPYING for more details. */ -#include <linux/module.h> +#include <linux/export.h> +#include <linux/thread_info.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/bitmap.h> #include <linux/bitops.h> +#include <linux/bug.h> #include <asm/uaccess.h> /* @@ -351,7 +353,7 @@ again: EXPORT_SYMBOL(bitmap_find_next_zero_area); /* - * Bitmap printing & parsing functions: first version by Bill Irwin, + * Bitmap printing & parsing functions: first version by Nadia Yvette Chambers, * second version by Paul Jackson, third by Joe Korty. */ @@ -367,7 +369,8 @@ EXPORT_SYMBOL(bitmap_find_next_zero_area); * @nmaskbits: size of bitmap, in bits * * Exactly @nmaskbits bits are displayed. Hex digits are grouped into - * comma-separated sets of eight digits per set. + * comma-separated sets of eight digits per set. Returns the number of + * characters which were written to *buf, excluding the trailing \0. */ int bitmap_scnprintf(char *buf, unsigned int buflen, const unsigned long *maskp, int nmaskbits) @@ -515,8 +518,8 @@ EXPORT_SYMBOL(bitmap_parse_user); * * Helper routine for bitmap_scnlistprintf(). Write decimal number * or range to buf, suppressing output past buf+buflen, with optional - * comma-prefix. Return len of what would be written to buf, if it - * all fit. + * comma-prefix. Return len of what was written to *buf, excluding the + * trailing \0. */ static inline int bscnl_emit(char *buf, int buflen, int rbot, int rtop, int len) { @@ -542,9 +545,8 @@ 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 written to *buf + * excluding the trailing '\0', as per ISO C99's scnprintf. */ int bitmap_scnlistprintf(char *buf, unsigned int buflen, const unsigned long *maskp, int nmaskbits) |