Adding debian version 5.10.209-2.debian/5.10.209-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/debian/patches-rt/0044-Documentation-io-mapping-Remove-outdated-blurb.patch b/debian/patches-rt/0044-Documentation-io-mapping-Remove-outdated-blurb.patch
new file mode 100644
index 000000000..4ea660fff
--- /dev/null
+++ b/debian/patches-rt/0044-Documentation-io-mapping-Remove-outdated-blurb.patch
@@ -0,0 +1,48 @@
+From edd5c644d78fbd912f6386c97ed2b4eaf2b58b47 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Tue, 3 Nov 2020 10:27:33 +0100
+Subject: [PATCH 044/323] Documentation/io-mapping: Remove outdated blurb
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+The implementation details in the documentation are outdated and not really
+helpful. Remove them.
+
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ Documentation/driver-api/io-mapping.rst | 22 ----------------------
+ 1 file changed, 22 deletions(-)
+
+diff --git a/Documentation/driver-api/io-mapping.rst b/Documentation/driver-api/io-mapping.rst
+index a966239f04e4..e33b88268554 100644
+--- a/Documentation/driver-api/io-mapping.rst
++++ b/Documentation/driver-api/io-mapping.rst
+@@ -73,25 +73,3 @@ for pages mapped with io_mapping_map_wc.
+ At driver close time, the io_mapping object must be freed::
+ 
+ 	void io_mapping_free(struct io_mapping *mapping)
+-
+-Current Implementation
+-======================
+-
+-The initial implementation of these functions uses existing mapping
+-mechanisms and so provides only an abstraction layer and no new
+-functionality.
+-
+-On 64-bit processors, io_mapping_create_wc calls ioremap_wc for the whole
+-range, creating a permanent kernel-visible mapping to the resource. The
+-map_atomic and map functions add the requested offset to the base of the
+-virtual address returned by ioremap_wc.
+-
+-On 32-bit processors with HIGHMEM defined, io_mapping_map_atomic_wc uses
+-kmap_atomic_pfn to map the specified page in an atomic fashion;
+-kmap_atomic_pfn isn't really supposed to be used with device pages, but it
+-provides an efficient mapping for this usage.
+-
+-On 32-bit processors without HIGHMEM defined, io_mapping_map_atomic_wc and
+-io_mapping_map_wc both use ioremap_wc, a terribly inefficient function which
+-performs an IPI to inform all processors about the new mapping. This results
+-in a significant performance penalty.
+-- 
+2.43.0
+