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From: Frederic Weisbecker on 19 May 2010 13:30
Pushdown the bkl to rpc_pipe_ioctl.

Signed-off-by: Frederic Weisbecker <fweisbec(a)gmail.com>
Cc: "J. Bruce Fields" <bfields(a)fieldses.org>
Cc: Neil Brown <neilb(a)suse.de>
Cc: Nfs <linux-nfs(a)vger.kernel.org>
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Cc: John Kacur <jkacur(a)redhat.com>
Cc: Arnd Bergmann <arnd(a)arndb.de>
---
net/sunrpc/rpc_pipe.c | 18 +++++++++++++++---
1 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 20e30c6..95ccbcf 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -27,6 +27,7 @@
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/cache.h>
+#include <linux/smp_lock.h>

static struct vfsmount *rpc_mount __read_mostly;
static int rpc_mount_count;
@@ -309,8 +310,7 @@ rpc_pipe_poll(struct file *filp, struct poll_table_struct *wait)
}

static int
-rpc_pipe_ioctl(struct inode *ino, struct file *filp,
- unsigned int cmd, unsigned long arg)
+rpc_pipe_ioctl_unlocked(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct rpc_inode *rpci = RPC_I(filp->f_path.dentry->d_inode);
int len;
@@ -331,13 +331,25 @@ rpc_pipe_ioctl(struct inode *ino, struct file *filp,
}
}

+static long
+rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ lock_kernel();
+ ret = rpc_pipe_ioctl_unlocked(filp, cmd, arg);
+ unlock_kernel();
+
+ return ret;
+}
+
static const struct file_operations rpc_pipe_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = rpc_pipe_read,
.write = rpc_pipe_write,
.poll = rpc_pipe_poll,
- .ioctl = rpc_pipe_ioctl,
+ .unlocked_ioctl = rpc_pipe_ioctl,
.open = rpc_pipe_open,
.release = rpc_pipe_release,
};
--
1.6.2.3

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Prev: [PATCH 0/8] Another set of ioctl bkl pushdown, almost the end
Next: [RFC] Unified Ring Buffer (Next Generation)