From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 27 Aug 2012 23:55:01 +0000 (-0400)
Subject: new helpers: fdget()/fdput()
X-Git-Tag: next-20120924~98^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=09062f13dbe16990490a1a87c79ba6b9ea5d4752;p=karo-tx-linux.git

new helpers: fdget()/fdput()

Signed-off-bs: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/include/linux/file.h b/include/linux/file.h
index 6eee54aea279..45f10bbc3fc7 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -26,8 +26,27 @@ static inline void fput_light(struct file *file, int fput_needed)
 		fput(file);
 }
 
+struct fd {
+	struct file *file;
+	int need_put;
+};
+
+static inline void fdput(struct fd fd)
+{
+	if (fd.need_put)
+		fput(fd.file);
+}
+
 extern struct file *fget(unsigned int fd);
 extern struct file *fget_light(unsigned int fd, int *fput_needed);
+
+static inline struct fd fdget(unsigned int fd)
+{
+	int b;
+	struct file *f = fget_light(fd, &b);
+	return (struct fd){f,b};
+}
+
 extern struct file *fget_raw(unsigned int fd);
 extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);
 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);