[source] kernel: backport MIPS changes introducing a separate IRQ stack
LEDE Commits
lede-commits at lists.infradead.org
Sun Jan 15 09:28:29 PST 2017
nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/1708644f1915eb7587a904d81da0ef0b559d1567
commit 1708644f1915eb7587a904d81da0ef0b559d1567
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Jan 11 10:57:49 2017 +0100
kernel: backport MIPS changes introducing a separate IRQ stack
Prevents crashes when IRQs arrive when the current kernel stack context
already contains deeply nested function calls, e.g. when stacking lots
of network devices on top of each other
Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
.../ar71xx/patches-4.4/500-MIPS-fw-myloader.patch | 2 +-
.../linux/ath25/patches-4.4/107-ar5312_gpio.patch | 2 +-
.../linux/brcm47xx/patches-4.4/159-cpu_fixes.patch | 2 +-
.../322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch | 2 +-
.../062-01-MIPS-Introduce-irq_stack.patch | 70 +++++++++++++
...2-MIPS-Stack-unwinding-while-on-IRQ-stack.patch | 42 ++++++++
...hange-28-to-thread_info-if-coming-from-us.patch | 48 +++++++++
...IPS-Switch-to-the-irq_stack-in-interrupts.patch | 116 +++++++++++++++++++++
...05-MIPS-Select-HAVE_IRQ_EXIT_ON_IRQ_STACK.patch | 21 ++++
...copy-appended-dtb-to-the-end-of-the-kerne.patch | 4 +-
.../patches-4.4/132-mips_inline_dma_ops.patch | 4 +-
.../patches-4.4/300-mips_expose_boot_raw.patch | 4 +-
.../patches-4.4/301-mips_image_cmdline_hack.patch | 2 +-
.../generic/patches-4.4/304-mips_disable_fpu.patch | 2 +-
.../linux/lantiq/patches-4.4/0152-lantiq-VPE.patch | 2 +-
.../0025-pinctrl-ralink-add-pinctrl-driver.patch | 2 +-
...28-GPIO-ralink-add-mt7621-gpio-controller.patch | 2 +-
17 files changed, 312 insertions(+), 15 deletions(-)
diff --git a/target/linux/ar71xx/patches-4.4/500-MIPS-fw-myloader.patch b/target/linux/ar71xx/patches-4.4/500-MIPS-fw-myloader.patch
index e877b0c..811a234 100644
--- a/target/linux/ar71xx/patches-4.4/500-MIPS-fw-myloader.patch
+++ b/target/linux/ar71xx/patches-4.4/500-MIPS-fw-myloader.patch
@@ -10,7 +10,7 @@
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1117,6 +1117,9 @@ config MIPS_MSC
+@@ -1118,6 +1118,9 @@ config MIPS_MSC
config MIPS_NILE4
bool
diff --git a/target/linux/ath25/patches-4.4/107-ar5312_gpio.patch b/target/linux/ath25/patches-4.4/107-ar5312_gpio.patch
index 3627cee..e6196c8 100644
--- a/target/linux/ath25/patches-4.4/107-ar5312_gpio.patch
+++ b/target/linux/ath25/patches-4.4/107-ar5312_gpio.patch
@@ -202,7 +202,7 @@
+subsys_initcall(ar5312_gpio_init);
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -117,6 +117,7 @@ config ATH25
+@@ -118,6 +118,7 @@ config ATH25
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_HAS_EARLY_PRINTK
diff --git a/target/linux/brcm47xx/patches-4.4/159-cpu_fixes.patch b/target/linux/brcm47xx/patches-4.4/159-cpu_fixes.patch
index cf72d66..795969b 100644
--- a/target/linux/brcm47xx/patches-4.4/159-cpu_fixes.patch
+++ b/target/linux/brcm47xx/patches-4.4/159-cpu_fixes.patch
@@ -260,7 +260,7 @@
#endif /* _ASM_R4KCACHE_H */
--- a/arch/mips/include/asm/stackframe.h
+++ b/arch/mips/include/asm/stackframe.h
-@@ -358,6 +358,10 @@
+@@ -365,6 +365,10 @@
.macro RESTORE_SP_AND_RET
LONG_L sp, PT_R29(sp)
.set arch=r4000
diff --git a/target/linux/brcm63xx/patches-4.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch b/target/linux/brcm63xx/patches-4.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
index f611ddc..c7c9c35 100644
--- a/target/linux/brcm63xx/patches-4.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
+++ b/target/linux/brcm63xx/patches-4.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
@@ -14,7 +14,7 @@ Signed-off-by: Jonas Gorski <jogo at openwrt.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -206,6 +206,9 @@ config BCM63XX
+@@ -207,6 +207,9 @@ config BCM63XX
select SYNC_R4K
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
diff --git a/target/linux/generic/patches-4.4/062-01-MIPS-Introduce-irq_stack.patch b/target/linux/generic/patches-4.4/062-01-MIPS-Introduce-irq_stack.patch
new file mode 100644
index 0000000..2a929aa
--- /dev/null
+++ b/target/linux/generic/patches-4.4/062-01-MIPS-Introduce-irq_stack.patch
@@ -0,0 +1,70 @@
+From: Matt Redfearn <matt.redfearn at imgtec.com>
+Date: Mon, 19 Dec 2016 14:20:56 +0000
+Subject: [PATCH] MIPS: Introduce irq_stack
+
+Allocate a per-cpu irq stack for use within interrupt handlers.
+
+Also add a utility function on_irq_stack to determine if a given stack
+pointer is within the irq stack for that cpu.
+
+Signed-off-by: Matt Redfearn <matt.redfearn at imgtec.com>
+---
+
+--- a/arch/mips/include/asm/irq.h
++++ b/arch/mips/include/asm/irq.h
+@@ -17,6 +17,18 @@
+
+ #include <irq.h>
+
++#define IRQ_STACK_SIZE THREAD_SIZE
++
++extern void *irq_stack[NR_CPUS];
++
++static inline bool on_irq_stack(int cpu, unsigned long sp)
++{
++ unsigned long low = (unsigned long)irq_stack[cpu];
++ unsigned long high = low + IRQ_STACK_SIZE;
++
++ return (low <= sp && sp <= high);
++}
++
+ #ifdef CONFIG_I8259
+ static inline int irq_canonicalize(int irq)
+ {
+--- a/arch/mips/kernel/asm-offsets.c
++++ b/arch/mips/kernel/asm-offsets.c
+@@ -101,6 +101,7 @@ void output_thread_info_defines(void)
+ OFFSET(TI_REGS, thread_info, regs);
+ DEFINE(_THREAD_SIZE, THREAD_SIZE);
+ DEFINE(_THREAD_MASK, THREAD_MASK);
++ DEFINE(_IRQ_STACK_SIZE, IRQ_STACK_SIZE);
+ BLANK();
+ }
+
+--- a/arch/mips/kernel/irq.c
++++ b/arch/mips/kernel/irq.c
+@@ -25,6 +25,8 @@
+ #include <linux/atomic.h>
+ #include <asm/uaccess.h>
+
++void *irq_stack[NR_CPUS];
++
+ /*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+@@ -55,6 +57,15 @@ void __init init_IRQ(void)
+ irq_set_noprobe(i);
+
+ arch_init_irq();
++
++ for_each_possible_cpu(i) {
++ int irq_pages = IRQ_STACK_SIZE / PAGE_SIZE;
++ void *s = (void *)__get_free_pages(GFP_KERNEL, irq_pages);
++
++ irq_stack[i] = s;
++ pr_debug("CPU%d IRQ stack at 0x%p - 0x%p\n", i,
++ irq_stack[i], irq_stack[i] + IRQ_STACK_SIZE);
++ }
+ }
+
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
diff --git a/target/linux/generic/patches-4.4/062-02-MIPS-Stack-unwinding-while-on-IRQ-stack.patch b/target/linux/generic/patches-4.4/062-02-MIPS-Stack-unwinding-while-on-IRQ-stack.patch
new file mode 100644
index 0000000..513e904
--- /dev/null
+++ b/target/linux/generic/patches-4.4/062-02-MIPS-Stack-unwinding-while-on-IRQ-stack.patch
@@ -0,0 +1,42 @@
+From: Matt Redfearn <matt.redfearn at imgtec.com>
+Date: Mon, 19 Dec 2016 14:20:57 +0000
+Subject: [PATCH] MIPS: Stack unwinding while on IRQ stack
+
+Within unwind stack, check if the stack pointer being unwound is within
+the CPU's irq_stack and if so use that page rather than the task's stack
+page.
+
+Signed-off-by: Matt Redfearn <matt.redfearn at imgtec.com>
+---
+
+--- a/arch/mips/kernel/process.c
++++ b/arch/mips/kernel/process.c
+@@ -32,6 +32,7 @@
+ #include <asm/cpu.h>
+ #include <asm/dsp.h>
+ #include <asm/fpu.h>
++#include <asm/irq.h>
+ #include <asm/msa.h>
+ #include <asm/pgtable.h>
+ #include <asm/mipsregs.h>
+@@ -507,7 +508,19 @@ EXPORT_SYMBOL(unwind_stack_by_address);
+ unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
+ unsigned long pc, unsigned long *ra)
+ {
+- unsigned long stack_page = (unsigned long)task_stack_page(task);
++ unsigned long stack_page = 0;
++ int cpu;
++
++ for_each_possible_cpu(cpu) {
++ if (on_irq_stack(cpu, *sp)) {
++ stack_page = (unsigned long)irq_stack[cpu];
++ break;
++ }
++ }
++
++ if (!stack_page)
++ stack_page = (unsigned long)task_stack_page(task);
++
+ return unwind_stack_by_address(stack_page, sp, pc, ra);
+ }
+ #endif
diff --git a/target/linux/generic/patches-4.4/062-03-MIPS-Only-change-28-to-thread_info-if-coming-from-us.patch b/target/linux/generic/patches-4.4/062-03-MIPS-Only-change-28-to-thread_info-if-coming-from-us.patch
new file mode 100644
index 0000000..e13c67b
--- /dev/null
+++ b/target/linux/generic/patches-4.4/062-03-MIPS-Only-change-28-to-thread_info-if-coming-from-us.patch
@@ -0,0 +1,48 @@
+From: Matt Redfearn <matt.redfearn at imgtec.com>
+Date: Mon, 19 Dec 2016 14:20:58 +0000
+Subject: [PATCH] MIPS: Only change $28 to thread_info if coming from user
+ mode
+
+The SAVE_SOME macro is used to save the execution context on all
+exceptions.
+If an exception occurs while executing user code, the stack is switched
+to the kernel's stack for the current task, and register $28 is switched
+to point to the current_thread_info, which is at the bottom of the stack
+region.
+If the exception occurs while executing kernel code, the stack is left,
+and this change ensures that register $28 is not updated. This is the
+correct behaviour when the kernel can be executing on the separate irq
+stack, because the thread_info will not be at the base of it.
+
+With this change, register $28 is only switched to it's kernel
+conventional usage of the currrent thread info pointer at the point at
+which execution enters kernel space. Doing it on every exception was
+redundant, but OK without an IRQ stack, but will be erroneous once that
+is introduced.
+
+Signed-off-by: Matt Redfearn <matt.redfearn at imgtec.com>
+Reviewed-by: Maciej W. Rozycki <macro at imgtec.com>
+---
+
+--- a/arch/mips/include/asm/stackframe.h
++++ b/arch/mips/include/asm/stackframe.h
+@@ -216,12 +216,19 @@
+ LONG_S $25, PT_R25(sp)
+ LONG_S $28, PT_R28(sp)
+ LONG_S $31, PT_R31(sp)
++
++ /* Set thread_info if we're coming from user mode */
++ mfc0 k0, CP0_STATUS
++ sll k0, 3 /* extract cu0 bit */
++ bltz k0, 9f
++
+ ori $28, sp, _THREAD_MASK
+ xori $28, _THREAD_MASK
+ #ifdef CONFIG_CPU_CAVIUM_OCTEON
+ .set mips64
+ pref 0, 0($28) /* Prefetch the current pointer */
+ #endif
++9:
+ .set pop
+ .endm
+
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
new file mode 100644
index 0000000..9bd2336
--- /dev/null
+++ b/target/linux/generic/patches-4.4/062-04-MIPS-Switch-to-the-irq_stack-in-interrupts.patch
@@ -0,0 +1,116 @@
+From: Matt Redfearn <matt.redfearn at 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 at 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)
+
+ /*
diff --git a/target/linux/generic/patches-4.4/062-05-MIPS-Select-HAVE_IRQ_EXIT_ON_IRQ_STACK.patch b/target/linux/generic/patches-4.4/062-05-MIPS-Select-HAVE_IRQ_EXIT_ON_IRQ_STACK.patch
new file mode 100644
index 0000000..a4942b8
--- /dev/null
+++ b/target/linux/generic/patches-4.4/062-05-MIPS-Select-HAVE_IRQ_EXIT_ON_IRQ_STACK.patch
@@ -0,0 +1,21 @@
+From: Matt Redfearn <matt.redfearn at imgtec.com>
+Date: Mon, 19 Dec 2016 14:21:00 +0000
+Subject: [PATCH] MIPS: Select HAVE_IRQ_EXIT_ON_IRQ_STACK
+
+Since do_IRQ is now invoked on a separate IRQ stack, we select
+HAVE_IRQ_EXIT_ON_IRQ_STACK so that softirq's may be invoked directly
+from irq_exit(), rather than requiring do_softirq_own_stack.
+
+Signed-off-by: Matt Redfearn <matt.redfearn at imgtec.com>
+---
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -9,6 +9,7 @@ config MIPS
+ select HAVE_CONTEXT_TRACKING
+ select HAVE_GENERIC_DMA_COHERENT
+ select HAVE_IDE
++ select HAVE_IRQ_EXIT_ON_IRQ_STACK
+ select HAVE_OPROFILE
+ select HAVE_PERF_EVENTS
+ select PERF_USE_VMALLOC
diff --git a/target/linux/generic/patches-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch b/target/linux/generic/patches-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch
index 71df429..78188dd 100644
--- a/target/linux/generic/patches-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch
+++ b/target/linux/generic/patches-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch
@@ -27,7 +27,7 @@ Signed-off-by: Ralf Baechle <ralf at linux-mips.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2752,10 +2752,10 @@ choice
+@@ -2753,10 +2753,10 @@ choice
the documented boot protocol using a device tree.
config MIPS_RAW_APPENDED_DTB
@@ -40,7 +40,7 @@ Signed-off-by: Ralf Baechle <ralf at linux-mips.org>
(e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
This is meant as a backward compatibility convenience for those
-@@ -2767,24 +2767,6 @@ choice
+@@ -2768,24 +2768,6 @@ choice
look like a DTB header after a reboot if no actual DTB is appended
to vmlinux.bin. Do not leave this option active in a production kernel
if you don't intend to always append a DTB.
diff --git a/target/linux/generic/patches-4.4/132-mips_inline_dma_ops.patch b/target/linux/generic/patches-4.4/132-mips_inline_dma_ops.patch
index bf7dca6..143b0bb 100644
--- a/target/linux/generic/patches-4.4/132-mips_inline_dma_ops.patch
+++ b/target/linux/generic/patches-4.4/132-mips_inline_dma_ops.patch
@@ -19,7 +19,7 @@ Signed-off-by: Felix Fietkau <nbd at nbd.name>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1618,6 +1618,7 @@ config CPU_CAVIUM_OCTEON
+@@ -1619,6 +1619,7 @@ config CPU_CAVIUM_OCTEON
select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
select MIPS_L1_CACHE_SHIFT_7
@@ -27,7 +27,7 @@ Signed-off-by: Felix Fietkau <nbd at nbd.name>
help
The Cavium Octeon processor is a highly integrated chip containing
many ethernet hardware widgets for networking tasks. The processor
-@@ -1913,6 +1914,9 @@ config MIPS_MALTA_PM
+@@ -1914,6 +1915,9 @@ config MIPS_MALTA_PM
bool
default y
diff --git a/target/linux/generic/patches-4.4/300-mips_expose_boot_raw.patch b/target/linux/generic/patches-4.4/300-mips_expose_boot_raw.patch
index 76c7078..0980c26 100644
--- a/target/linux/generic/patches-4.4/300-mips_expose_boot_raw.patch
+++ b/target/linux/generic/patches-4.4/300-mips_expose_boot_raw.patch
@@ -8,7 +8,7 @@ Acked-by: Rob Landley <rob at landley.net>
---
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1032,9 +1032,6 @@ config FW_ARC
+@@ -1033,9 +1033,6 @@ config FW_ARC
config ARCH_MAY_HAVE_PC_FDC
bool
@@ -18,7 +18,7 @@ Acked-by: Rob Landley <rob at landley.net>
config CEVT_BCM1480
bool
-@@ -2792,6 +2789,18 @@ choice
+@@ -2793,6 +2790,18 @@ choice
bool "Bootloader kernel arguments if available"
endchoice
diff --git a/target/linux/generic/patches-4.4/301-mips_image_cmdline_hack.patch b/target/linux/generic/patches-4.4/301-mips_image_cmdline_hack.patch
index 878f74d..625a84c 100644
--- a/target/linux/generic/patches-4.4/301-mips_image_cmdline_hack.patch
+++ b/target/linux/generic/patches-4.4/301-mips_image_cmdline_hack.patch
@@ -1,6 +1,6 @@
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1123,6 +1123,10 @@ config SYNC_R4K
+@@ -1124,6 +1124,10 @@ config SYNC_R4K
config MIPS_MACHINE
def_bool n
diff --git a/target/linux/generic/patches-4.4/304-mips_disable_fpu.patch b/target/linux/generic/patches-4.4/304-mips_disable_fpu.patch
index aabb4f1..a08564d 100644
--- a/target/linux/generic/patches-4.4/304-mips_disable_fpu.patch
+++ b/target/linux/generic/patches-4.4/304-mips_disable_fpu.patch
@@ -26,7 +26,7 @@ v2: incorporated changes suggested by Jonas Gorski
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2724,6 +2724,20 @@ config MIPS_O32_FP64_SUPPORT
+@@ -2725,6 +2725,20 @@ config MIPS_O32_FP64_SUPPORT
If unsure, say N.
diff --git a/target/linux/lantiq/patches-4.4/0152-lantiq-VPE.patch b/target/linux/lantiq/patches-4.4/0152-lantiq-VPE.patch
index 8488d47..bf883c8 100644
--- a/target/linux/lantiq/patches-4.4/0152-lantiq-VPE.patch
+++ b/target/linux/lantiq/patches-4.4/0152-lantiq-VPE.patch
@@ -1,6 +1,6 @@
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2220,6 +2220,12 @@ config MIPS_VPE_LOADER
+@@ -2221,6 +2221,12 @@ config MIPS_VPE_LOADER
Includes a loader for loading an elf relocatable object
onto another VPE and running it.
diff --git a/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch b/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
index 315d956..f7fc932 100644
--- a/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
+++ b/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
@@ -14,7 +14,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -585,6 +585,8 @@ config RALINK
+@@ -586,6 +586,8 @@ config RALINK
select CLKDEV_LOOKUP
select ARCH_HAS_RESET_CONTROLLER
select RESET_CONTROLLER
diff --git a/target/linux/ramips/patches-4.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-4.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
index 46a1d9e..0f7f366 100644
--- a/target/linux/ramips/patches-4.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
+++ b/target/linux/ramips/patches-4.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
@@ -14,7 +14,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -587,6 +587,9 @@ config RALINK
+@@ -588,6 +588,9 @@ config RALINK
select RESET_CONTROLLER
select PINCTRL
select PINCTRL_RT2880
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