linux-kernel - [PATCH] unshare: remove dead code

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Message-ID: <20121025142539.16724.76390.stgit@localhost.localdomain>
Date:	Thu, 25 Oct 2012 15:25:54 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: [PATCH] unshare: remove dead code

From: Alan Cox <alan@...ux.intel.com>

If new_nsproxy is set we will always call switch_task_namespaces and then
set new_nsproxy back to NULL so the reassignment and fall through check
are redundant

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 kernel/fork.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index acc4cb6..60854b2 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1792,10 +1792,8 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 			exit_sem(current);
 		}
 
-		if (new_nsproxy) {
+		if (new_nsproxy)
 			switch_task_namespaces(current, new_nsproxy);
-			new_nsproxy = NULL;
-		}
 
 		task_lock(current);
 
@@ -1819,9 +1817,6 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 		task_unlock(current);
 	}
 
-	if (new_nsproxy)
-		put_nsproxy(new_nsproxy);
-
 bad_unshare_cleanup_fd:
 	if (new_fd)
 		put_files_struct(new_fd);

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