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authorMike Travis <travis@sgi.com>2008-03-26 01:06:55 +0300
committerIngo Molnar <mingo@elte.hu>2008-04-19 21:44:58 +0400
commit30ca60c15a725f655e5d3f14e0238a066bc5aeb7 (patch)
tree96d36a2cf12e7a964ce4cd0c49d30b2d40f94b52 /include/linux/cpumask.h
parent9f0e738f492522a2f70ad9a2a0287e4e966c633a (diff)
downloadlinux-30ca60c15a725f655e5d3f14e0238a066bc5aeb7.tar.xz
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.h7
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,