kernel: Make the patches apply on top of 4.19

This makes the patches which were just copied in the previous commit
apply on top of kernel 4.19.

The patches in the backports-4.19 folder were checked if they are really
in kernel 4.19 based on the title and only removed if they were found in
the upstream kernel.

The following additional patches form the pending folder went into
upstream Linux 4.19:
pending-4.19/171-usb-dwc2-Fix-inefficient-copy-of-unaligned-buffers.patch
pending-4.19/190-2-5-e1000e-Fix-wrong-comment-related-to-link-detection.patch
pending-4.19/478-mtd-spi-nor-Add-support-for-XM25QH64A-and-XM25QH128A.patch
pending-4.19/479-mtd-spi-nor-add-eon-en25qh32.patch
pending-4.19/950-tty-serial-exar-generalize-rs485-setup.patch
pending-4.19/340-MIPS-mm-remove-mips_dma_mapping_error.patch

Bigger changes were introduced to the m25p80 spi nor driver, as far as I
saw it in the new code, it now has the functionality provided in this
patch:
pending-4.19/450-mtd-m25p80-allow-fallback-from-spi_flash_read-to-reg.patch

Part of this patch went upstream independent of OpenWrt:
hack-4.19/220-gc_sections.patch
This patch was reworked to match the changes done upstream.

The MIPS DMA API changed a lot, this patch was rewritten to match the
new DMA handling:
pending-4.19/341-MIPS-mm-remove-no-op-dma_map_ops-where-possible.patch

I did bigger manual changes to the following patches and I am not 100% sure if they are all correct:
pending-4.19/0931-w1-gpio-fix-problem-with-platfom-data-in-w1-gpio.patch
pending-4.19/411-mtd-partial_eraseblock_write.patch
pending-4.19/600-netfilter_conntrack_flush.patch
pending-4.19/611-netfilter_match_bypass_default_table.patch
pending-4.19/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
hack-4.19/211-host_tools_portability.patch
hack-4.19/221-module_exports.patch
hack-4.19/321-powerpc_crtsavres_prereq.patch
hack-4.19/902-debloat_proc.patch

This is based on patchset from Marko Ratkaj <marko.ratkaj@sartura.hr>

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 80 insertions, 146 deletions

diff --git a/target/linux/generic/hack-4.19/220-gc_sections.patch b/target/linux/generic/hack-4.19/220-gc_sections.patch
index d257232403..17fcc5cbd2 100644
--- a/target/linux/generic/hack-4.19/220-gc_sections.patch
+++ b/target/linux/generic/hack-4.19/220-gc_sections.patch
@@ -21,43 +21,43 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/Makefile
 +++ b/Makefile
-@@ -272,6 +272,11 @@ else
+@@ -294,6 +294,11 @@ else
  scripts/Kbuild.include: ;
  include scripts/Kbuild.include
  
 +ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
-+KBUILD_CFLAGS_KERNEL	+= $(call cc-option,-ffunction-sections,)
-+KBUILD_CFLAGS_KERNEL	+= $(call cc-option,-fdata-sections,)
++KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
++LDFLAGS_vmlinux += --gc-sections
 +endif
 +
  # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
-@@ -788,11 +793,6 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH
+@@ -785,11 +790,6 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH
  KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  endif
  
 -ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
--KBUILD_CFLAGS	+= $(call cc-option,-ffunction-sections,)
--KBUILD_CFLAGS	+= $(call cc-option,-fdata-sections,)
+-KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
+-LDFLAGS_vmlinux += --gc-sections
 -endif
 -
  # arch Makefile may override CC so keep this after arch Makefile is included
  NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
- CHECKFLAGS     += $(NOSTDINC_FLAGS)
+ 
 --- a/arch/arm/Kconfig
 +++ b/arch/arm/Kconfig
-@@ -91,6 +91,7 @@ config ARM
+@@ -98,6 +98,7 @@ config ARM
  	select HAVE_UID16
  	select HAVE_VIRT_CPU_ACCOUNTING_GEN
  	select IRQ_FORCED_THREADING
-+	select LD_DEAD_CODE_DATA_ELIMINATION
++	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
  	select MODULES_USE_ELF_REL
+ 	select NEED_DMA_MAP_STATE
  	select NO_BOOTMEM
- 	select OF_EARLY_FLATTREE if OF
 --- a/arch/arm/boot/compressed/Makefile
 +++ b/arch/arm/boot/compressed/Makefile
-@@ -103,6 +103,7 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y)
+@@ -106,6 +106,7 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y)
  ORIG_CFLAGS := $(KBUILD_CFLAGS)
  KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
  endif
@@ -67,80 +67,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  # but it is being used too early to link to meaningful stack_chk logic.
 --- a/arch/arm/kernel/vmlinux.lds.S
 +++ b/arch/arm/kernel/vmlinux.lds.S
-@@ -18,7 +18,7 @@
- #define PROC_INFO							\
- 	. = ALIGN(4);							\
- 	VMLINUX_SYMBOL(__proc_info_begin) = .;				\
--	*(.proc.info.init)						\
-+	KEEP(*(.proc.info.init))					\
- 	VMLINUX_SYMBOL(__proc_info_end) = .;
- 
- #define HYPERVISOR_TEXT							\
-@@ -29,11 +29,11 @@
- #define IDMAP_TEXT							\
- 	ALIGN_FUNCTION();						\
- 	VMLINUX_SYMBOL(__idmap_text_start) = .;				\
--	*(.idmap.text)							\
-+	KEEP(*(.idmap.text))						\
- 	VMLINUX_SYMBOL(__idmap_text_end) = .;				\
- 	. = ALIGN(PAGE_SIZE);						\
- 	VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;			\
--	*(.hyp.idmap.text)						\
-+	KEEP(*(.hyp.idmap.text))					\
- 	VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
- 
- #ifdef CONFIG_HOTPLUG_CPU
-@@ -106,7 +106,7 @@ SECTIONS
- 		_stext = .;		/* Text and read-only data	*/
- 			IDMAP_TEXT
- 			__exception_text_start = .;
--			*(.exception.text)
-+			KEEP(*(.exception.text))
- 			__exception_text_end = .;
- 			IRQENTRY_TEXT
- 			SOFTIRQENTRY_TEXT
-@@ -135,7 +135,7 @@ SECTIONS
- 	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
- 		__start___ex_table = .;
- #ifdef CONFIG_MMU
--		*(__ex_table)
-+		KEEP(*(__ex_table))
- #endif
- 		__stop___ex_table = .;
- 	}
-@@ -147,12 +147,12 @@ SECTIONS
- 	. = ALIGN(8);
- 	.ARM.unwind_idx : {
- 		__start_unwind_idx = .;
--		*(.ARM.exidx*)
-+		KEEP(*(.ARM.exidx*))
- 		__stop_unwind_idx = .;
- 	}
- 	.ARM.unwind_tab : {
- 		__start_unwind_tab = .;
--		*(.ARM.extab*)
-+		KEEP(*(.ARM.extab*))
- 		__stop_unwind_tab = .;
- 	}
- #endif
-@@ -172,14 +172,14 @@ SECTIONS
- 	 */
- 	__vectors_start = .;
- 	.vectors 0xffff0000 : AT(__vectors_start) {
--		*(.vectors)
-+		KEEP(*(.vectors))
- 	}
- 	. = __vectors_start + SIZEOF(.vectors);
- 	__vectors_end = .;
- 
- 	__stubs_start = .;
- 	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
--		*(.stubs)
-+		KEEP(*(.stubs))
- 	}
- 	. = __stubs_start + SIZEOF(.stubs);
- 	__stubs_end = .;
-@@ -195,24 +195,24 @@ SECTIONS
+@@ -100,24 +100,24 @@ SECTIONS
  	}
  	.init.arch.info : {
  		__arch_info_begin = .;
@@ -168,14 +95,78 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 +		KEEP(*(.pv_table))
  		__pv_table_end = .;
  	}
- 	.init.data : {
+ 
+--- a/arch/arm/kernel/vmlinux.lds.h
++++ b/arch/arm/kernel/vmlinux.lds.h
+@@ -22,13 +22,13 @@
+ #define ARM_MMU_DISCARD(x)
+ #else
+ #define ARM_MMU_KEEP(x)
+-#define ARM_MMU_DISCARD(x)	x
++#define ARM_MMU_DISCARD(x)	KEEP(x)
+ #endif
+ 
+ #define PROC_INFO							\
+ 		. = ALIGN(4);						\
+ 		__proc_info_begin = .;					\
+-		*(.proc.info.init)					\
++		KEEP(*(.proc.info.init))				\
+ 		__proc_info_end = .;
+ 
+ #define HYPERVISOR_TEXT							\
+@@ -39,11 +39,11 @@
+ #define IDMAP_TEXT							\
+ 		ALIGN_FUNCTION();					\
+ 		__idmap_text_start = .;					\
+-		*(.idmap.text)						\
++		KEEP(*(.idmap.text))					\
+ 		__idmap_text_end = .;					\
+ 		. = ALIGN(PAGE_SIZE);					\
+ 		__hyp_idmap_text_start = .;				\
+-		*(.hyp.idmap.text)					\
++		KEEP(*(.hyp.idmap.text))				\
+ 		__hyp_idmap_text_end = .;
+ 
+ #define ARM_DISCARD							\
+@@ -86,12 +86,12 @@
+ 	. = ALIGN(8);							\
+ 	.ARM.unwind_idx : {						\
+ 		__start_unwind_idx = .;					\
+-		*(.ARM.exidx*)						\
++		KEEP(*(.ARM.exidx*))					\
+ 		__stop_unwind_idx = .;					\
+ 	}								\
+ 	.ARM.unwind_tab : {						\
+ 		__start_unwind_tab = .;					\
+-		*(.ARM.extab*)						\
++		KEEP(*(.ARM.extab*))					\
+ 		__stop_unwind_tab = .;					\
+ 	}
+ 
+@@ -102,14 +102,14 @@
+ #define ARM_VECTORS							\
+ 	__vectors_start = .;						\
+ 	.vectors 0xffff0000 : AT(__vectors_start) {			\
+-		*(.vectors)						\
++		KEEP(*(.vectors))					\
+ 	}								\
+ 	. = __vectors_start + SIZEOF(.vectors);				\
+ 	__vectors_end = .;						\
+ 									\
+ 	__stubs_start = .;						\
+ 	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {		\
+-		*(.stubs)						\
++		KEEP(*(.stubs))						\
+ 	}								\
+ 	. = __stubs_start + SIZEOF(.stubs);				\
+ 	__stubs_end = .;						\
 --- a/arch/mips/Kconfig
 +++ b/arch/mips/Kconfig
-@@ -40,6 +40,7 @@ config MIPS
+@@ -43,6 +43,7 @@ config MIPS
+ 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES && 64BIT
  	select HAVE_CBPF_JIT if (!64BIT && !CPU_MICROMIPS)
  	select HAVE_EBPF_JIT if (64BIT && !CPU_MICROMIPS)
- 	select HAVE_CC_STACKPROTECTOR
-+	select LD_DEAD_CODE_DATA_ELIMINATION
++	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
  	select HAVE_CONTEXT_TRACKING
  	select HAVE_COPY_THREAD_TLS
  	select HAVE_C_RECORDMCOUNT
@@ -199,60 +190,3 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  		__mips_machines_end = .;
  	}
  
---- a/include/asm-generic/vmlinux.lds.h
-+++ b/include/asm-generic/vmlinux.lds.h
-@@ -105,7 +105,7 @@
- #ifdef CONFIG_FTRACE_MCOUNT_RECORD
- #define MCOUNT_REC()	. = ALIGN(8);				\
- 			VMLINUX_SYMBOL(__start_mcount_loc) = .; \
--			*(__mcount_loc)				\
-+			KEEP(*(__mcount_loc))			\
- 			VMLINUX_SYMBOL(__stop_mcount_loc) = .;
- #else
- #define MCOUNT_REC()
-@@ -113,7 +113,7 @@
- 
- #ifdef CONFIG_TRACE_BRANCH_PROFILING
- #define LIKELY_PROFILE()	VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
--				*(_ftrace_annotated_branch)			      \
-+				KEEP(*(_ftrace_annotated_branch))		      \
- 				VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
- #else
- #define LIKELY_PROFILE()
-@@ -121,7 +121,7 @@
- 
- #ifdef CONFIG_PROFILE_ALL_BRANCHES
- #define BRANCH_PROFILE()	VMLINUX_SYMBOL(__start_branch_profile) = .;   \
--				*(_ftrace_branch)			      \
-+				KEEP(*(_ftrace_branch))			      \
- 				VMLINUX_SYMBOL(__stop_branch_profile) = .;
- #else
- #define BRANCH_PROFILE()
-@@ -237,7 +237,8 @@
- 	LIKELY_PROFILE()		       				\
- 	BRANCH_PROFILE()						\
- 	TRACE_PRINTKS()							\
--	TRACEPOINT_STR()
-+	TRACEPOINT_STR()                                                \
-+	*(.data.[a-zA-Z_]*)
- 
- /*
-  * Data section helpers
-@@ -496,7 +497,7 @@
- #define ENTRY_TEXT							\
- 		ALIGN_FUNCTION();					\
- 		VMLINUX_SYMBOL(__entry_text_start) = .;			\
--		*(.entry.text)						\
-+		KEEP(*(.entry.text))					\
- 		VMLINUX_SYMBOL(__entry_text_end) = .;
- 
- #define IRQENTRY_TEXT							\
-@@ -603,7 +604,7 @@
- 	. = ALIGN(sbss_align);						\
- 	.sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {				\
- 		*(.dynsbss)						\
--		*(.sbss)						\
-+		*(.sbss .sbss.*)					\
- 		*(.scommon)						\
- 	}
-