kernel: remove support for kernel 4.19

We use 5.4 on all targets by default, and 4.19 has never been released
in a stable version. There is no reason to keep it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 192 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
deleted file mode 100644
index 36deac48b7..0000000000
--- a/target/linux/generic/hack-4.19/220-gc_sections.patch
+++ /dev/null
@@ -1,192 +0,0 @@
-From e3d8676f5722b7622685581e06e8f53e6138e3ab Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 15 Jul 2017 23:42:36 +0200
-Subject: use -ffunction-sections, -fdata-sections and --gc-sections
-
-In combination with kernel symbol export stripping this significantly reduces
-the kernel image size. Used on both ARM and MIPS architectures.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
-Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
----
- Makefile                          | 10 +++----
- arch/arm/Kconfig                  |  1 +
- arch/arm/boot/compressed/Makefile |  1 +
- arch/arm/kernel/vmlinux.lds.S     | 26 ++++++++--------
- arch/mips/Kconfig                 |  1 +
- arch/mips/kernel/vmlinux.lds.S    |  4 +--
- include/asm-generic/vmlinux.lds.h | 63 ++++++++++++++++++++-------------------
- 7 files changed, 55 insertions(+), 51 deletions(-)
-
---- a/Makefile
-+++ b/Makefile
-@@ -294,6 +294,11 @@ else
- scripts/Kbuild.include: ;
- include scripts/Kbuild.include
- 
-+ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
-+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)
-@@ -772,11 +777,6 @@ 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_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 $(CC) -print-file-name=include)
- 
---- a/arch/arm/Kconfig
-+++ b/arch/arm/Kconfig
-@@ -98,6 +98,7 @@ config ARM
- 	select HAVE_UID16
- 	select HAVE_VIRT_CPU_ACCOUNTING_GEN
- 	select IRQ_FORCED_THREADING
-+	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
- 	select MODULES_USE_ELF_REL
- 	select NEED_DMA_MAP_STATE
- 	select NO_BOOTMEM
---- a/arch/arm/boot/compressed/Makefile
-+++ b/arch/arm/boot/compressed/Makefile
-@@ -106,6 +106,7 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y)
- ORIG_CFLAGS := $(KBUILD_CFLAGS)
- KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
- endif
-+KBUILD_CFLAGS_KERNEL := $(patsubst -f%-sections,,$(KBUILD_CFLAGS_KERNEL))
- 
- # -fstack-protector-strong triggers protection checks in this code,
- # 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
-@@ -100,24 +100,24 @@ SECTIONS
- 	}
- 	.init.arch.info : {
- 		__arch_info_begin = .;
--		*(.arch.info.init)
-+		KEEP(*(.arch.info.init))
- 		__arch_info_end = .;
- 	}
- 	.init.tagtable : {
- 		__tagtable_begin = .;
--		*(.taglist.init)
-+		KEEP(*(.taglist.init))
- 		__tagtable_end = .;
- 	}
- #ifdef CONFIG_SMP_ON_UP
- 	.init.smpalt : {
- 		__smpalt_begin = .;
--		*(.alt.smp.init)
-+		KEEP(*(.alt.smp.init))
- 		__smpalt_end = .;
- 	}
- #endif
- 	.init.pv_table : {
- 		__pv_table_begin = .;
--		*(.pv_table)
-+		KEEP(*(.pv_table))
- 		__pv_table_end = .;
- 	}
- 
---- 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
-@@ -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_LD_DEAD_CODE_DATA_ELIMINATION
- 	select HAVE_CONTEXT_TRACKING
- 	select HAVE_COPY_THREAD_TLS
- 	select HAVE_C_RECORDMCOUNT
---- a/arch/mips/kernel/vmlinux.lds.S
-+++ b/arch/mips/kernel/vmlinux.lds.S
-@@ -72,7 +72,7 @@ SECTIONS
- 	/* Exception table for data bus errors */
- 	__dbe_table : {
- 		__start___dbe_table = .;
--		*(__dbe_table)
-+		KEEP(*(__dbe_table))
- 		__stop___dbe_table = .;
- 	}
- 
-@@ -123,7 +123,7 @@ SECTIONS
- 	. = ALIGN(4);
- 	.mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
- 		__mips_machines_start = .;
--		*(.mips.machines.init)
-+		KEEP(*(.mips.machines.init))
- 		__mips_machines_end = .;
- 	}
-