1 files changed, 0 insertions, 107 deletions
diff --git a/0010-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch b/0010-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch
deleted file mode 100644
index 28a066ead711..000000000000
--- a/0010-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch
+++ /dev/null
@@ -1,107 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Kenny Levinsen <kl@kl.wtf>
-Date: Sun, 27 Dec 2020 14:43:13 +0000
-Subject: [PATCH] ZEN: Input: evdev - use call_rcu when detaching client
-
-Significant time was spent on synchronize_rcu in evdev_detach_client
-when applications closed evdev devices. Switching VT away from a
-graphical environment commonly leads to mass input device closures,
-which could lead to noticable delays on systems with many input devices.
-
-Replace synchronize_rcu with call_rcu, deferring reclaim of the evdev
-client struct till after the RCU grace period instead of blocking the
-calling application.
-
-While this does not solve all slow evdev fd closures, it takes care of a
-good portion of them, including this simple test:
-
-	#include <fcntl.h>
-	#include <unistd.h>
-
-	int main(int argc, char *argv[])
-	{
-		int idx, fd;
-		const char *path = "/dev/input/event0";
-		for (idx = 0; idx < 1000; idx++) {
-			if ((fd = open(path, O_RDWR)) == -1) {
-				return -1;
-			}
-			close(fd);
-		}
-		return 0;
-	}
-
-Time to completion of above test when run locally:
-
-	Before: 0m27.111s
-	After:  0m0.018s
-
-Signed-off-by: Kenny Levinsen <kl@kl.wtf>
----
- drivers/input/evdev.c | 19 +++++++++++--------
- 1 file changed, 11 insertions(+), 8 deletions(-)
-
-diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
-index 95f90699d2b17b4e42e067bf44b6deac611fdb8b..2b10fe29d2c8d9028a2f8d6c2c8987f01802f471 100644
---- a/drivers/input/evdev.c
-+++ b/drivers/input/evdev.c
-@@ -46,6 +46,7 @@ struct evdev_client {
- 	struct fasync_struct *fasync;
- 	struct evdev *evdev;
- 	struct list_head node;
-+	struct rcu_head rcu;
- 	enum input_clock_type clk_type;
- 	bool revoked;
- 	unsigned long *evmasks[EV_CNT];
-@@ -377,13 +378,22 @@ static void evdev_attach_client(struct evdev *evdev,
- 	spin_unlock(&evdev->client_lock);
- }
- 
-+static void evdev_reclaim_client(struct rcu_head *rp)
-+{
-+	struct evdev_client *client = container_of(rp, struct evdev_client, rcu);
-+	unsigned int i;
-+	for (i = 0; i < EV_CNT; ++i)
-+		bitmap_free(client->evmasks[i]);
-+	kvfree(client);
-+}
-+
- static void evdev_detach_client(struct evdev *evdev,
- 				struct evdev_client *client)
- {
- 	spin_lock(&evdev->client_lock);
- 	list_del_rcu(&client->node);
- 	spin_unlock(&evdev->client_lock);
--	synchronize_rcu();
-+	call_rcu(&client->rcu, evdev_reclaim_client);
- }
- 
- static int evdev_open_device(struct evdev *evdev)
-@@ -436,7 +446,6 @@ static int evdev_release(struct inode *inode, struct file *file)
- {
- 	struct evdev_client *client = file->private_data;
- 	struct evdev *evdev = client->evdev;
--	unsigned int i;
- 
- 	mutex_lock(&evdev->mutex);
- 
-@@ -448,11 +457,6 @@ static int evdev_release(struct inode *inode, struct file *file)
- 
- 	evdev_detach_client(evdev, client);
- 
--	for (i = 0; i < EV_CNT; ++i)
--		bitmap_free(client->evmasks[i]);
--
--	kvfree(client);
--
- 	evdev_close_device(evdev);
- 
- 	return 0;
-@@ -495,7 +499,6 @@ static int evdev_open(struct inode *inode, struct file *file)
- 
-  err_free_client:
- 	evdev_detach_client(evdev, client);
--	kvfree(client);
- 	return error;
- }
-