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authorMike Travis <travis@sgi.com>2008-03-25 15:06:55 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:44:58 +0200
commit30ca60c15a725f655e5d3f14e0238a066bc5aeb7 (patch)
tree96d36a2cf12e7a964ce4cd0c49d30b2d40f94b52 /include/linux
parent9f0e738f492522a2f70ad9a2a0287e4e966c633a (diff)
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')
-rw-r--r--include/linux/bitmap.h1
-rw-r--r--include/linux/cpumask.h7
2 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index acad1105d94..1dbe074f1c6 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -108,6 +108,7 @@ extern int __bitmap_weight(const unsigned long *bitmap, int bits);
extern int bitmap_scnprintf(char *buf, unsigned int len,
const unsigned long *src, int nbits);
+extern int bitmap_scnprintf_len(unsigned int len);
extern int __bitmap_parse(const char *buf, unsigned int buflen, int is_user,
unsigned long *dst, int nbits);
extern int bitmap_parse_user(const char __user *ubuf, unsigned int ulen,
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 7047f58306a..67e0e38d32b 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,