kernel: update kernel 4.4 to 4.4.69

Bump the 17.01 tree kernel to 4.4.69. Trunk 4.4 and 17.01 4.4 have diverged, talked this
through with jow, he was okay with a clean diff against 17.01 and not a backported trunk
patch.

The following patches were applied upstream:

* 062-[1-6]-MIPS-* series
* 042-0004-mtd-bcm47xxpart-fix-parsing-first-block

Reintroduced lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup, as
it was incorrectly included upstream thus dropped from LEDE, but subsequently
reverted upstream. Thanks to Kevin Darbyshire-Bryant for pointing me to it.

  Compile-tested on: ar71xx, ramips/mt7621, x86/64.

  Run-tested on: ar71xx, ramips/mt7621, x86/64.

Signed-off-by: Stijn Segers <francesco.borromini@inventati.org>

1 files changed, 0 insertions, 116 deletions

diff --git a/target/linux/generic/patches-4.4/062-04-MIPS-Switch-to-the-irq_stack-in-interrupts.patch b/target/linux/generic/patches-4.4/062-04-MIPS-Switch-to-the-irq_stack-in-interrupts.patch
deleted file mode 100644
index 9bd2336974..0000000000
--- a/target/linux/generic/patches-4.4/062-04-MIPS-Switch-to-the-irq_stack-in-interrupts.patch
+++ /dev/null
@@ -1,116 +0,0 @@
-From: Matt Redfearn <matt.redfearn@imgtec.com>
-Date: Mon, 19 Dec 2016 14:20:59 +0000
-Subject: [PATCH] MIPS: Switch to the irq_stack in interrupts
-
-When enterring interrupt context via handle_int or except_vec_vi, switch
-to the irq_stack of the current CPU if it is not already in use.
-
-The current stack pointer is masked with the thread size and compared to
-the base or the irq stack. If it does not match then the stack pointer
-is set to the top of that stack, otherwise this is a nested irq being
-handled on the irq stack so the stack pointer should be left as it was.
-
-The in-use stack pointer is placed in the callee saved register s1. It
-will be saved to the stack when plat_irq_dispatch is invoked and can be
-restored once control returns here.
-
-Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
----
-
---- a/arch/mips/kernel/genex.S
-+++ b/arch/mips/kernel/genex.S
-@@ -188,9 +188,44 @@ NESTED(handle_int, PT_SIZE, sp)
- 
- 	LONG_L	s0, TI_REGS($28)
- 	LONG_S	sp, TI_REGS($28)
--	PTR_LA	ra, ret_from_irq
--	PTR_LA  v0, plat_irq_dispatch
--	jr	v0
-+
-+	/*
-+	 * SAVE_ALL ensures we are using a valid kernel stack for the thread.
-+	 * Check if we are already using the IRQ stack.
-+	 */
-+	move	s1, sp # Preserve the sp
-+
-+	/* Get IRQ stack for this CPU */
-+	ASM_CPUID_MFC0	k0, ASM_SMP_CPUID_REG
-+#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
-+	lui	k1, %hi(irq_stack)
-+#else
-+	lui	k1, %highest(irq_stack)
-+	daddiu	k1, %higher(irq_stack)
-+	dsll	k1, 16
-+	daddiu	k1, %hi(irq_stack)
-+	dsll	k1, 16
-+#endif
-+	LONG_SRL	k0, SMP_CPUID_PTRSHIFT
-+	LONG_ADDU	k1, k0
-+	LONG_L	t0, %lo(irq_stack)(k1)
-+
-+	# Check if already on IRQ stack
-+	PTR_LI	t1, ~(_THREAD_SIZE-1)
-+	and	t1, t1, sp
-+	beq	t0, t1, 2f
-+
-+	/* Switch to IRQ stack */
-+	li	t1, _IRQ_STACK_SIZE
-+	PTR_ADD sp, t0, t1
-+
-+2:
-+	jal	plat_irq_dispatch
-+
-+	/* Restore sp */
-+	move	sp, s1
-+
-+	j	ret_from_irq
- #ifdef CONFIG_CPU_MICROMIPS
- 	nop
- #endif
-@@ -263,8 +298,44 @@ NESTED(except_vec_vi_handler, 0, sp)
- 
- 	LONG_L	s0, TI_REGS($28)
- 	LONG_S	sp, TI_REGS($28)
--	PTR_LA	ra, ret_from_irq
--	jr	v0
-+
-+	/*
-+	 * SAVE_ALL ensures we are using a valid kernel stack for the thread.
-+	 * Check if we are already using the IRQ stack.
-+	 */
-+	move	s1, sp # Preserve the sp
-+
-+	/* Get IRQ stack for this CPU */
-+	ASM_CPUID_MFC0	k0, ASM_SMP_CPUID_REG
-+#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
-+	lui	k1, %hi(irq_stack)
-+#else
-+	lui	k1, %highest(irq_stack)
-+	daddiu	k1, %higher(irq_stack)
-+	dsll	k1, 16
-+	daddiu	k1, %hi(irq_stack)
-+	dsll	k1, 16
-+#endif
-+	LONG_SRL	k0, SMP_CPUID_PTRSHIFT
-+	LONG_ADDU	k1, k0
-+	LONG_L	t0, %lo(irq_stack)(k1)
-+
-+	# Check if already on IRQ stack
-+	PTR_LI	t1, ~(_THREAD_SIZE-1)
-+	and	t1, t1, sp
-+	beq	t0, t1, 2f
-+
-+	/* Switch to IRQ stack */
-+	li	t1, _IRQ_STACK_SIZE
-+	PTR_ADD sp, t0, t1
-+
-+2:
-+	jal	plat_irq_dispatch
-+
-+	/* Restore sp */
-+	move	sp, s1
-+
-+	j	ret_from_irq
- 	END(except_vec_vi_handler)
- 
- /*