[PATCH 1/2] kstrto*: add documentation

[Eldad Zack]

As J. Bruce Fields <bfields@xxxxxxxxxxxx> pointed out, kstrto* is
currently lacking kerneldoc comments.
This patch adds kerneldoc comments to common variants of kstrto*:
kstrto(u)l, kstrto(u)ll and kstrto(u)int.

Cc: J. Bruce Fields <bfields@xxxxxxxxxxxx>
Signed-off-by: Eldad Zack <eldad@xxxxxxxxxxxxxxx>
---
 include/linux/kernel.h |   36 ++++++++++++++++++++++++++++++++++++
 lib/kstrtox.c          |   18 ++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index e07f5e0..582df0f 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -220,6 +220,16 @@ int __must_check _kstrtol(const char *s, unsigned int base, long *res);
 
 int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
 int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
+
+/**
+ * kstrtoul - convert a string to an unsigned long
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtoul.
+ */
 static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
 {
 	/*
@@ -233,6 +243,15 @@ static inline int __must_check kstrtoul(const char *s, unsigned int base, unsign
 		return _kstrtoul(s, base, res);
 }
 
+/**
+ * kstrtol - convert a string to a long
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtol.
+ */
 static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
 {
 	/*
@@ -246,7 +265,24 @@ static inline int __must_check kstrtol(const char *s, unsigned int base, long *r
 		return _kstrtol(s, base, res);
 }
 
+/**
+ * kstrtouint - convert a string to an unsigned int
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ */
 int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
+
+/**
+ * kstrtoint - convert a string to an int
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ */
 int __must_check kstrtoint(const char *s, unsigned int base, int *res);
 
 static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
diff --git a/lib/kstrtox.c b/lib/kstrtox.c
index c3615ea..7f5bca2 100644
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -104,6 +104,15 @@ static int _kstrtoull(const char *s, unsigned int base, unsigned long long *res)
 	return 0;
 }
 
+/**
+ * kstrtoull - convert a string to an unsigned long long
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtoull.
+ */
 int kstrtoull(const char *s, unsigned int base, unsigned long long *res)
 {
 	if (s[0] == '+')
@@ -112,6 +121,15 @@ int kstrtoull(const char *s, unsigned int base, unsigned long long *res)
 }
 EXPORT_SYMBOL(kstrtoull);
 
+/**
+ * kstrtoll - convert a string to a long long
+ * @s: The start of the string
+ * @base: The number base to use
+ * @res: Where to write the result of the conversion if successful
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtoll.
+ */
 int kstrtoll(const char *s, unsigned int base, long long *res)
 {
 	unsigned long long tmp;
-- 
1.7.10.4

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