linux-kernel - kern_path() returns error in kernel 4.4

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Message-ID: <CAN93O9pogTCwAwz=QWY19SnARUL=heP7EB7ENzxvNaA5MevNDQ@mail.gmail.com>
Date:	Mon, 13 Jun 2016 17:12:27 +0800
From:	dongke di <didongke@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: kern_path() returns error in kernel 4.4

struct path path;
int r = kern_path( "/tmp/abc.txt", LOOKUP_FOLLOW | LOOKUP_PARENT, &path );

The file abc.txt does not exist.

On Ubuntu 14.04 ( kernel 3.13 ), r is zero (succed).
On Ubuntu 16.04 ( kernel 4.4 ), r is -2 ( fail).

Is it a bug or other else ?