Patch "orangefs: Use RCU for destroy_inode" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    orangefs: Use RCU for destroy_inode

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     orangefs-use-rcu-for-destroy_inode.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 0695d7dc1d9f19b82ec2cae24856bddce278cfe6 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 24 Feb 2017 16:43:36 +0100
Subject: orangefs: Use RCU for destroy_inode

From: Peter Zijlstra <peterz@infradead.org>

commit 0695d7dc1d9f19b82ec2cae24856bddce278cfe6 upstream.

freeing of inodes must be RCU-delayed on all filesystems

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/orangefs/super.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -115,6 +115,13 @@ static struct inode *orangefs_alloc_inod
 	return &orangefs_inode->vfs_inode;
 }
 
+static void orangefs_i_callback(struct rcu_head *head)
+{
+	struct inode *inode = container_of(head, struct inode, i_rcu);
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	kmem_cache_free(orangefs_inode_cache, orangefs_inode);
+}
+
 static void orangefs_destroy_inode(struct inode *inode)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
@@ -123,7 +130,7 @@ static void orangefs_destroy_inode(struc
 			"%s: deallocated %p destroying inode %pU\n",
 			__func__, orangefs_inode, get_khandle_from_ino(inode));
 
-	kmem_cache_free(orangefs_inode_cache, orangefs_inode);
+	call_rcu(&inode->i_rcu, orangefs_i_callback);
 }
 
 /*


Patches currently in stable-queue which might be from peterz@infradead.org are

queue-4.9/orangefs-use-rcu-for-destroy_inode.patch