Update to 5.17.0.pf1

- New upstream release based on 5.17.0
- Update kernel configs from arch and arch32
- Disable projectc patch-set for now in favor of ZEN interactive
  patches

1 files changed, 110 insertions, 0 deletions

diff --git a/0008-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch b/0008-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch
new file mode 100644
index 000000000000..dbc1360bab79
--- /dev/null
+++ b/0008-ZEN-Input-evdev-use-call_rcu-when-detaching-client.patch
@@ -0,0 +1,110 @@
+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 95f90699d2b1..2b10fe29d2c8 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;
+ }
+ 
+-- 
+2.35.1
+