linux/parser.h: add include guards
<linux/parser.h> is missing include guards. Add them.
This is needed to allow declaring a function in <linux/fscrypt.h> that
takes a substring_t parameter.
Link: https://lore.kernel.org/r/20200512233251.118314-2-ebiggers@kernel.org
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
diff --git a/include/linux/parser.h b/include/linux/parser.h
index 12fc348..89e2b23 100644
--- a/include/linux/parser.h
+++ b/include/linux/parser.h
@@ -7,7 +7,8 @@
* but could potentially be used anywhere else that simple option=arg
* parsing is required.
*/
-
+#ifndef _LINUX_PARSER_H
+#define _LINUX_PARSER_H
/* associates an integer enumerator with a pattern string. */
struct match_token {
@@ -34,3 +35,5 @@ int match_hex(substring_t *, int *result);
bool match_wildcard(const char *pattern, const char *str);
size_t match_strlcpy(char *, const substring_t *, size_t);
char *match_strdup(const substring_t *);
+
+#endif /* _LINUX_PARSER_H */