catfish: Add bluetooth_6lowpan

This is intended to be a first step to implementing a generic data
transfer profile over Bluetooth as described here:
AsteroidOS/asteroid-btsyncd#22

Signed-off-by: Ed Beroset <beroset@ieee.org>

meta-catfish/recipes-kernel/linux/linux-catfish/0001-scripts-dtc-Remove-redundant-YYLOC-global-declaratio.patch

@@ -1,4 +1,4 @@
-From 2fda810cc01e25a24877dce1058885cf2dad6c7e Mon Sep 17 00:00:00 2001
+From 20a37dcc4c1c2c071268790494153d9108aebebb Mon Sep 17 00:00:00 2001
 From: Dirk Mueller <dmueller@suse.com>
 Date: Tue, 14 Jan 2020 18:53:41 +0100
 Subject: [PATCH] scripts/dtc: Remove redundant YYLOC global declaration

meta-catfish/recipes-kernel/linux/linux-catfish/0002-usb-gadget-include-gadget-folder-to-fix-compilation.patch

@@ -1,4 +1,4 @@
-From 2627bcd9bdfb2769f20a64c88931839ae4284bac Mon Sep 17 00:00:00 2001
+From d39d6394e0137c1002ce9b523cfc1f71cc7d4061 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Darrel=20Gri=C3=ABt?= <dgriet@gmail.com>
 Date: Tue, 17 May 2022 22:20:45 +0200
 Subject: [PATCH] usb: gadget: include gadget folder to fix compilation.

meta-catfish/recipes-kernel/linux/linux-catfish/0003-char-bbd2.0-Fix-include-error.patch

@@ -1,4 +1,4 @@
-From 7d03a308da5c7b427edd641610aaf6feaa4c1663 Mon Sep 17 00:00:00 2001
+From 5a2d129de462fd77a5fbeae91d128a935107ce70 Mon Sep 17 00:00:00 2001
 From: MagneFire <IDaNLContact@gmail.com>
 Date: Wed, 3 Nov 2021 12:42:48 +0100
 Subject: [PATCH] char: bbd2.0: Fix include error.

meta-catfish/recipes-kernel/linux/linux-catfish/0004-Backport-mainline-4.1-Bluetooth-subsystem.patch

@@ -1,4 +1,4 @@
-From a79befbbde55d81301c459702e654d6b714c064c Mon Sep 17 00:00:00 2001
+From 47059bf004d00ff4cbfaa3b29511b936413ca1a0 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Darrel=20Gri=C3=ABt?= <dgriet@gmail.com>
 Date: Sun, 4 Sep 2022 17:08:45 +0200
 Subject: [PATCH] Backport mainline 4.1 Bluetooth subsystem
@@ -7,6 +7,7 @@ Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 
 Signed-off-by: Darrel Griët <dgriet@gmail.com>
+
 ---
  drivers/bluetooth/hci_h4.c        |  140 +-
  drivers/bluetooth/hci_ldisc.c     |  134 +-
@@ -31112,6 +31113,3 @@ index 86a683a8b491..6cf872563ea7 100644
 +#endif
 +
  #endif /* __SMP_H */
--- 
-2.36.1
-

meta-catfish/recipes-kernel/linux/linux-catfish/0005-Focaltech-Delay-when-sending-wakeup-event.patch

@@ -1,4 +1,4 @@
-From c199fcff42cbc559de3418d3348e6841867c94ce Mon Sep 17 00:00:00 2001
+From 20558045bef883b7fb1a5f695669ba04b28dabf8 Mon Sep 17 00:00:00 2001
 From: MagneFire <IDaNLContact@gmail.com>
 Date: Sun, 28 Nov 2021 21:29:31 +0100
 Subject: [PATCH] Focaltech: Delay when sending wakeup event.

meta-catfish/recipes-kernel/linux/linux-catfish/0006-dts-msm8909w-Enable-more-GPU-clock-frequencies.patch

@@ -1,4 +1,4 @@
-From 3d7bc36e2cf0752e134e3cc9d10d027c1e8683b9 Mon Sep 17 00:00:00 2001
+From 5eb31c2f94b00b4fff1e779fc4a64cde66f46cf3 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Darrel=20Gri=C3=ABt?= <dgriet@gmail.com>
 Date: Sun, 13 Nov 2022 23:29:48 +0100
 Subject: [PATCH] dts: msm8909w: Enable more GPU clock frequencies.
@@ -7,6 +7,7 @@ Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 
 Signed-off-by: Darrel Griët <dgriet@gmail.com>
+
 ---
  arch/arm/boot/dts/qcom/msm8909w-gpu.dtsi | 26 +++++++++++++++++++-----
  1 file changed, 21 insertions(+), 5 deletions(-)
@@ -55,6 +56,3 @@ index ff2806d9bcd6..8a126fda3b69 100644
  		};
 
  	};
--- 
-2.38.1
-

meta-catfish/recipes-kernel/linux/linux-catfish/0007-Add-missing-BT_6LOWPAN-option-to-bluetooth-Kconfig.patch

@@ -0,0 +1,31 @@
+From 0798c68764dbfa7e0536e660736e6ee0733201f6 Mon Sep 17 00:00:00 2001
+From: Ed Beroset <beroset@ieee.org>
+Date: Fri, 6 Oct 2023 11:59:35 -0400
+Subject: [PATCH] Add missing BT_6LOWPAN option to bluetooth Kconfig
+
+This adds the BT_6LOWPAN option back in.  It may have been deleted by
+accident.
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ net/bluetooth/Kconfig | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
+index 81f837f6d934..b8c794b87523 100644
+--- a/net/bluetooth/Kconfig
++++ b/net/bluetooth/Kconfig
+@@ -58,6 +58,12 @@ config BT_LE
+ 	depends on BT
+ 	default y
+
++config BT_6LOWPAN
++	tristate "Bluetooth 6LoWPAN support"
++	depends on BT_LE && 6LOWPAN
++	help
++	  IPv6 compression over Bluetooth Low Energy.
++
+ config BT_SELFTEST
+ 	bool "Bluetooth self testing support"
+ 	depends on BT && DEBUG_KERNEL

meta-catfish/recipes-kernel/linux/linux-catfish/0008-Restore-bluetooth_6lowpan-to-Makefile.patch

@@ -0,0 +1,28 @@
+From 0a8b03d82f56395807bad2af3da8d518a6272ccb Mon Sep 17 00:00:00 2001
+From: Ed Beroset <beroset@ieee.org>
+Date: Fri, 6 Oct 2023 12:08:29 -0400
+Subject: [PATCH] Restore bluetooth_6lowpan to Makefile
+
+I'm not sure why or how this was removed, but it's required for using
+6lowpan over Bluetooth.
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ net/bluetooth/Makefile | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
+index c85a6afc6fe1..9a8ea232d28f 100644
+--- a/net/bluetooth/Makefile
++++ b/net/bluetooth/Makefile
+@@ -7,6 +7,9 @@ obj-$(CONFIG_BT_RFCOMM)	+= rfcomm/
+ obj-$(CONFIG_BT_BNEP)	+= bnep/
+ obj-$(CONFIG_BT_CMTP)	+= cmtp/
+ obj-$(CONFIG_BT_HIDP)	+= hidp/
++obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
++
++bluetooth_6lowpan-y := 6lowpan.o
+
+ bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
+ 	hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \

meta-catfish/recipes-kernel/linux/linux-catfish/0009-Move-const-to-the-right-location.patch

@@ -0,0 +1,28 @@
+From d5ef82215b6e08ec806ce9be4e3852fbae4370d5 Mon Sep 17 00:00:00 2001
+From: Ed Beroset <beroset@ieee.org>
+Date: Fri, 6 Oct 2023 21:04:29 -0400
+Subject: [PATCH] Move const to the right location
+
+This fixes a small bug in the code in which a duplicate const
+declaration was apparently intended to be a const pointer to a const
+location.
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ include/linux/msm_mhi.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/linux/msm_mhi.h b/include/linux/msm_mhi.h
+index 08dc3a23abfa..a5ffa23a32d0 100644
+--- a/include/linux/msm_mhi.h
++++ b/include/linux/msm_mhi.h
+@@ -107,7 +107,7 @@ struct mhi_cb_info {
+
+ struct mhi_client_info_t {
+ 	enum MHI_CLIENT_CHANNEL chan;
+-	const struct device const *dev;
++	const struct device * const dev;
+ 	const char *node_name;
+ 	void (*mhi_client_cb)(struct mhi_cb_info *);
+ 	bool pre_allocate;

meta-catfish/recipes-kernel/linux/linux-catfish/0010-include-linux-module.h-copy-__init-__exit-attrs-to-i.patch

@@ -0,0 +1,79 @@
+From 1f625d36e52c2df876bfac4ec0267339411b32ee Mon Sep 17 00:00:00 2001
+From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
+Date: Wed, 6 Feb 2019 18:56:27 +0100
+Subject: [PATCH] include/linux/module.h: copy __init/__exit attrs to
+ init/cleanup_module
+
+The upcoming GCC 9 release extends the -Wmissing-attributes warnings
+(enabled by -Wall) to C and aliases: it warns when particular function
+attributes are missing in the aliases but not in their target.
+
+In particular, it triggers for all the init/cleanup_module
+aliases in the kernel (defined by the module_init/exit macros),
+ending up being very noisy.
+
+These aliases point to the __init/__exit functions of a module,
+which are defined as __cold (among other attributes). However,
+the aliases themselves do not have the __cold attribute.
+
+Since the compiler behaves differently when compiling a __cold
+function as well as when compiling paths leading to calls
+to __cold functions, the warning is trying to point out
+the possibly-forgotten attribute in the alias.
+
+In order to keep the warning enabled, we decided to silence
+this case. Ideally, we would mark the aliases directly
+as __init/__exit. However, there are currently around 132 modules
+in the kernel which are missing __init/__exit in their init/cleanup
+functions (either because they are missing, or for other reasons,
+e.g. the functions being called from somewhere else); and
+a section mismatch is a hard error.
+
+A conservative alternative was to mark the aliases as __cold only.
+However, since we would like to eventually enforce __init/__exit
+to be always marked,  we chose to use the new __copy function
+attribute (introduced by GCC 9 as well to deal with this).
+With it, we copy the attributes used by the target functions
+into the aliases. This way, functions that were not marked
+as __init/__exit won't have their aliases marked either,
+and therefore there won't be a section mismatch.
+
+Note that the warning would go away marking either the extern
+declaration, the definition, or both. However, we only mark
+the definition of the alias, since we do not want callers
+(which only see the declaration) to be compiled as if the function
+was __cold (and therefore the paths leading to those calls
+would be assumed to be unlikely).
+
+Link: https://lore.kernel.org/lkml/20190123173707.GA16603@gmail.com/
+Link: https://lore.kernel.org/lkml/20190206175627.GA20399@gmail.com/
+Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
+Acked-by: Jessica Yu <jeyu@kernel.org>
+Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ include/linux/init.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/linux/init.h b/include/linux/init.h
+index 28ec4d128413..d68791117bd9 100644
+--- a/include/linux/init.h
++++ b/include/linux/init.h
+@@ -331,13 +331,13 @@ void __init parse_early_options(char *cmdline);
+ #define module_init(initfn)					\
+ 	static inline initcall_t __inittest(void)		\
+ 	{ return initfn; }					\
+-	int init_module(void) __attribute__((alias(#initfn)));
++	int init_module(void) __copy(initfn) __attribute__((alias(#initfn)));
+
+ /* This is only required if you want to be unloadable. */
+ #define module_exit(exitfn)					\
+ 	static inline exitcall_t __exittest(void)		\
+ 	{ return exitfn; }					\
+-	void cleanup_module(void) __attribute__((alias(#exitfn)));
++	void cleanup_module(void) __copy(exitfn)  __attribute__((alias(#exitfn)));
+
+ #define __setup_param(str, unique_id, fn)	/* nothing */
+ #define __setup(str, func) 			/* nothing */

meta-catfish/recipes-kernel/linux/linux-catfish/0011-Compiler-Attributes-add-support-for-__copy-gcc-9.patch

@@ -0,0 +1,100 @@
+From 688a10561ed649dde940030f0d102f3c4698d781 Mon Sep 17 00:00:00 2001
+From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
+Date: Fri, 6 Oct 2023 22:27:17 -0400
+Subject: [PATCH] Compiler Attributes: add support for __copy (gcc >= 9)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From the GCC manual:
+
+  copy
+  copy(function)
+
+    The copy attribute applies the set of attributes with which function
+    has been declared to the declaration of the function to which
+    the attribute is applied. The attribute is designed for libraries
+    that define aliases or function resolvers that are expected
+    to specify the same set of attributes as their targets. The copy
+    attribute can be used with functions, variables, or types. However,
+    the kind of symbol to which the attribute is applied (either
+    function or variable) must match the kind of symbol to which
+    the argument refers. The copy attribute copies only syntactic and
+    semantic attributes but not attributes that affect a symbol’s
+    linkage or visibility such as alias, visibility, or weak.
+    The deprecated attribute is also not copied.
+
+  https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
+
+The upcoming GCC 9 release extends the -Wmissing-attributes warnings
+(enabled by -Wall) to C and aliases: it warns when particular function
+attributes are missing in the aliases but not in their target, e.g.:
+
+    void __cold f(void) {}
+    void __alias("f") g(void);
+
+diagnoses:
+
+    warning: 'g' specifies less restrictive attribute than
+    its target 'f': 'cold' [-Wmissing-attributes]
+
+Using __copy(f) we can copy the __cold attribute from f to g:
+
+    void __cold f(void) {}
+    void __copy(f) __alias("f") g(void);
+
+This attribute is most useful to deal with situations where an alias
+is declared but we don't know the exact attributes the target has.
+
+For instance, in the kernel, the widely used module_init/exit macros
+define the init/cleanup_module aliases, but those cannot be marked
+always as __init/__exit since some modules do not have their
+functions marked as such.
+
+Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
+Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
+Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
+
+Link: https://github.com/torvalds/linux/commit/c0d9782f5b6d7157635ae2fd782a4b27d55a6013
+Link: https://github.com/ojeda/linux/commit/8803fd49f7f86efa39b60957c74ccf98690ae2ab
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ include/linux/compiler.h | 23 +++++++++++++++++++++++
+ 1 file changed, 23 insertions(+)
+
+diff --git a/include/linux/compiler.h b/include/linux/compiler.h
+index 4c981adac770..682e8c0a95e5 100644
+--- a/include/linux/compiler.h
++++ b/include/linux/compiler.h
+@@ -50,6 +50,29 @@ extern void __chk_io_ptr(const volatile void __iomem *);
+
+ #ifdef __KERNEL__
+
++/*
++ * Minimal backport of compiler_attributes.h to add support for __copy
++ * to v4.9.y so that we can use it in init/exit_module to avoid
++ * -Werror=missing-attributes errors on GCC 9.
++ */
++#ifndef __has_attribute
++# define __has_attribute(x) __GCC4_has_attribute_##x
++# define __GCC4_has_attribute___copy__                0
++#endif
++
++/*
++ * Optional: only supported since gcc >= 9
++ * Optional: not supported by clang
++ * Optional: not supported by icc
++ *
++ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-copy-function-attribute
++ */
++#if __has_attribute(__copy__)
++# define __copy(symbol)                 __attribute__((__copy__(symbol)))
++#else
++# define __copy(symbol)
++#endif
++
+ #ifdef __GNUC__
+ #include <linux/compiler-gcc.h>
+ #endif

meta-catfish/recipes-kernel/linux/linux-catfish/0012-Fix-alignment-of-struct-members.patch

@@ -0,0 +1,56 @@
+From d4cee5cd8f9f9b18be074fa8b6e3a6b10bca7c05 Mon Sep 17 00:00:00 2001
+From: Ed Beroset <beroset@ieee.org>
+Date: Sat, 7 Oct 2023 11:42:34 -0400
+Subject: [PATCH] Fix alignment of struct members
+
+With newer versions (>9) of gcc, the compiler correctly warns that
+"taking address of packed member of 'struct diag_mempool_t' may result
+in an unaligned pointer value [-Waddress-of-packed-member]."
+
+A similar warning comes up for dci_pkt_req_entry_t.
+
+This removes the __packed attribute from both structs to address that
+problem.
+
+Signed-off-by: Ed Beroset <beroset@ieee.org>
+
+---
+ drivers/char/diag/diag_dci.h | 4 ++--
+ drivers/char/diag/diagmem.h  | 2 +-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/char/diag/diag_dci.h b/drivers/char/diag/diag_dci.h
+index a9e2d35cc50a..bf988c5fff23 100644
+--- a/drivers/char/diag/diag_dci.h
++++ b/drivers/char/diag/diag_dci.h
+@@ -95,7 +95,7 @@ struct dci_pkt_req_entry_t {
+ 	int uid;
+ 	int tag;
+ 	struct list_head track;
+-} __packed;
++};
+
+ struct diag_dci_reg_tbl_t {
+ 	int client_id;
+@@ -164,7 +164,7 @@ struct diag_dci_health_stats_proc {
+ 	int client_id;
+ 	struct diag_dci_health_stats health;
+ 	int proc;
+-} __packed;
++};
+
+ struct diag_dci_peripherals_t {
+ 	int proc;
+diff --git a/drivers/char/diag/diagmem.h b/drivers/char/diag/diagmem.h
+index d097a3799e9a..77ef3003559e 100644
+--- a/drivers/char/diag/diagmem.h
++++ b/drivers/char/diag/diagmem.h
+@@ -50,7 +50,7 @@ struct diag_mempool_t {
+ 	unsigned int poolsize;
+ 	int count;
+ 	spinlock_t lock;
+-} __packed;
++};
+
+ extern struct diag_mempool_t diag_mempools[NUM_MEMORY_POOLS];
+