diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/bitmap.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index b499ab6ada29..5bc7a1128fe8 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -12,6 +12,8 @@ #include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/bug.h> + +#include <asm/page.h> #include <asm/uaccess.h> /* @@ -584,6 +586,33 @@ int bitmap_scnlistprintf(char *buf, unsigned int buflen, EXPORT_SYMBOL(bitmap_scnlistprintf); /** + * bitmap_print_to_pagebuf - convert bitmap to list or hex format ASCII string + * @list: indicates whether the bitmap must be list + * @buf: page aligned buffer into which string is placed + * @maskp: pointer to bitmap to convert + * @nmaskbits: size of bitmap, in bits + * + * Output format is a comma-separated list of decimal numbers and + * ranges if list is specified or hex digits grouped into comma-separated + * sets of 8 digits/set. Returns the number of characters written to buf. + */ +int bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp, + int nmaskbits) +{ + ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf - 2; + int n = 0; + + if (len > 1) { + n = list ? bitmap_scnlistprintf(buf, len, maskp, nmaskbits) : + bitmap_scnprintf(buf, len, maskp, nmaskbits); + buf[n++] = '\n'; + buf[n] = '\0'; + } + return n; +} +EXPORT_SYMBOL(bitmap_print_to_pagebuf); + +/** * __bitmap_parselist - convert list format ASCII string to bitmap * @buf: read nul-terminated user string from this buffer * @buflen: buffer size in bytes. If string is smaller than this |