diff options
| author |   Mike Travis <travis@sgi.com> | 2008-03-25 15:06:55 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:58 +0200 |
| commit | 30ca60c15a725f655e5d3f14e0238a066bc5aeb7 (patch) | |
| tree | 96d36a2cf12e7a964ce4cd0c49d30b2d40f94b52 /include/linux/cpumask.h | |
| parent | sched: fix cpus_allowed settings (diff) | |
| download | linux-dev-30ca60c15a725f655e5d3f14e0238a066bc5aeb7.tar.xz linux-dev-30ca60c15a725f655e5d3f14e0238a066bc5aeb7.zip | |
cpumask: add cpumask_scnprintf_len function
Add a new function cpumask_scnprintf_len() to return the number of
characters needed to display "len" cpumask bits. The current method
of allocating NR_CPUS bytes is incorrect as what's really needed is
9 characters per 32-bit word of cpumask bits (8 hex digits plus the
seperator [','] or the terminating NULL.) This function provides the
caller the means to allocate the correct string length.
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/cpumask.h')
| -rw-r--r-- | include/linux/cpumask.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 7047f58306a7..67e0e38d32b1 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -273,6 +273,13 @@ static inline int __cpumask_scnprintf(char *buf, int len, return bitmap_scnprintf(buf, len, srcp->bits, nbits); } +#define cpumask_scnprintf_len(len) \ + __cpumask_scnprintf_len((len)) +static inline int __cpumask_scnprintf_len(int len) +{ + return bitmap_scnprintf_len(len); +} + #define cpumask_parse_user(ubuf, ulen, dst) \ __cpumask_parse_user((ubuf), (ulen), &(dst), NR_CPUS) static inline int __cpumask_parse_user(const char __user *buf, int len, |