From: Eric W. Biederman <ebiederm@xmission.com>
Date: Fri, 30 Nov 2007 12:52:10 +0000 (+1100)
Subject: sysctl: Remember the ctl_table we passed to register_sysctl_paths
X-Git-Tag: firefly_0821_release~23655^2~1318
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=23eb06de7d2d333a0f7ebba2da663e00c9c9483e;p=firefly-linux-kernel-4.4.55.git

sysctl: Remember the ctl_table we passed to register_sysctl_paths

By doing this we allow users of register_sysctl_paths that build
and dynamically allocate their ctl_table to be simpler.  This allows
them to just remember the ctl_table_header returned from
register_sysctl_paths from which they can now find the
ctl_table array they need to free.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Daniel Lezcano <dlezcano@fr.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 3b6e2c9fbb2e..77de3bfd8744 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -1057,6 +1057,7 @@ struct ctl_table_header
 	struct list_head ctl_entry;
 	int used;
 	struct completion *unregistering;
+	struct ctl_table *ctl_table_arg;
 };
 
 /* struct ctl_path describes where in the hierarchy a table is added */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index f580542333eb..89b7d95ecf51 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1669,6 +1669,7 @@ struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
 		new += 2;
 	}
 	*prevp = table;
+	header->ctl_table_arg = table;
 
 	INIT_LIST_HEAD(&header->ctl_entry);
 	header->used = 0;