[rt] Update to 5.9-rc5-rt7 and re-enable

1 files changed, 0 insertions, 66 deletions

diff --git a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch b/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch
deleted file mode 100644
index b0ad92aea..000000000
--- a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch
+++ /dev/null
@@ -1,66 +0,0 @@
-From: Julia Cartwright <julia@ni.com>
-Date: Mon, 7 May 2018 08:58:57 -0500
-Subject: [PATCH] squashfs: make use of local lock in multi_cpu
- decompressor
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.6/older/patches-5.6.10-rt5.tar.xz
-
-Currently, the squashfs multi_cpu decompressor makes use of
-get_cpu_ptr()/put_cpu_ptr(), which unconditionally disable preemption
-during decompression.
-
-Because the workload is distributed across CPUs, all CPUs can observe a
-very high wakeup latency, which has been seen to be as much as 8000us.
-
-Convert this decompressor to make use of a local lock, which will allow
-execution of the decompressor with preemption-enabled, but also ensure
-concurrent accesses to the percpu compressor data on the local CPU will
-be serialized.
-
-Cc: stable-rt@vger.kernel.org
-Reported-by: Alexander Stein <alexander.stein@systec-electronic.com>
-Tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
-Signed-off-by: Julia Cartwright <julia@ni.com>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- fs/squashfs/decompressor_multi_percpu.c |   16 ++++++++++++----
- 1 file changed, 12 insertions(+), 4 deletions(-)
-
---- a/fs/squashfs/decompressor_multi_percpu.c
-+++ b/fs/squashfs/decompressor_multi_percpu.c
-@@ -8,6 +8,7 @@
- #include <linux/slab.h>
- #include <linux/percpu.h>
- #include <linux/buffer_head.h>
-+#include <linux/locallock.h>
- 
- #include "squashfs_fs.h"
- #include "squashfs_fs_sb.h"
-@@ -23,6 +24,8 @@ struct squashfs_stream {
- 	void		*stream;
- };
- 
-+static DEFINE_LOCAL_IRQ_LOCK(stream_lock);
-+
- void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
- 						void *comp_opts)
- {
-@@ -77,10 +80,15 @@ int squashfs_decompress(struct squashfs_
- {
- 	struct squashfs_stream __percpu *percpu =
- 			(struct squashfs_stream __percpu *) msblk->stream;
--	struct squashfs_stream *stream = get_cpu_ptr(percpu);
--	int res = msblk->decompressor->decompress(msblk, stream->stream, bh, b,
--		offset, length, output);
--	put_cpu_ptr(stream);
-+	struct squashfs_stream *stream;
-+	int res;
-+
-+	stream = get_locked_ptr(stream_lock, percpu);
-+
-+	res = msblk->decompressor->decompress(msblk, stream->stream, bh, b,
-+			offset, length, output);
-+
-+	put_locked_ptr(stream_lock, stream);
- 
- 	if (res < 0)
- 		ERROR("%s decompression failed, data probably corrupt\n",