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authorMichal Schmidt <mschmidt@redhat.com>2011-10-10 00:03:37 +0200
committerRusty Russell <rusty@rustcorp.com.au>2011-10-26 13:10:39 +1030
commitb1e4d20cbf2ef8e27515da032b95fdcbb5b06bf1 (patch)
treef080e839635fa36f55d22d147baa12ae64d4c181 /include/linux/moduleparam.h
parent37252db6aa576c34fd794a5a54fb32d7a8b3a07a (diff)
params: make dashes and underscores in parameter names truly equal
The user may use "foo-bar" for a kernel parameter defined as "foo_bar". Make sure it works the other way around too. Apply the equality of dashes and underscores on early_params and __setup params as well. The example given in Documentation/kernel-parameters.txt indicates that this is the intended behaviour. With the patch the kernel accepts "log-buf-len=1M" as expected. https://bugzilla.redhat.com/show_bug.cgi?id=744545 Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (neatened implementations)
Diffstat (limited to 'include/linux/moduleparam.h')
-rw-r--r--include/linux/moduleparam.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index ddaae98c53f9..fffb10bd5514 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -262,6 +262,26 @@ static inline void __kernel_param_unlock(void)
.str = &__param_string_##name, 0, perm); \
__MODULE_PARM_TYPE(name, "string")
+/**
+ * parameq - checks if two parameter names match
+ * @name1: parameter name 1
+ * @name2: parameter name 2
+ *
+ * Returns true if the two parameter names are equal.
+ * Dashes (-) are considered equal to underscores (_).
+ */
+extern bool parameq(const char *name1, const char *name2);
+
+/**
+ * parameqn - checks if two parameter names match
+ * @name1: parameter name 1
+ * @name2: parameter name 2
+ * @n: the length to compare
+ *
+ * Similar to parameq(), except it compares @n characters.
+ */
+extern bool parameqn(const char *name1, const char *name2, size_t n);
+
/* Called on module insert or kernel boot */
extern int parse_args(const char *name,
char *args,