riscv: irq: fix: check weather irq stack is in-use.

arch/riscv/configs/defconfig

@@ -10,7 +10,6 @@ CONFIG_MEMCG=y
 CONFIG_BLK_CGROUP=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_CFS_BANDWIDTH=y
-CONFIG_RT_GROUP_SCHED=y
 CONFIG_CGROUP_PIDS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_HUGETLB=y
@@ -19,17 +18,15 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_CGROUP_PERF=y
 CONFIG_CGROUP_BPF=y
-CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CHECKPOINT_RESTORE=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_EXPERT=y
-# CONFIG_SYSFS_SYSCALL is not set
 CONFIG_PROFILING=y
+CONFIG_ARCH_ANDES=y
 CONFIG_ARCH_MICROCHIP=y
-CONFIG_ARCH_RENESAS=y
 CONFIG_ARCH_SIFIVE=y
 CONFIG_ARCH_SOPHGO=y
+CONFIG_ARCH_SPACEMIT=y
 CONFIG_SOC_STARFIVE=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_THEAD=y
@@ -138,10 +135,13 @@ CONFIG_MACB=y
 CONFIG_E1000E=y
 CONFIG_R8169=y
 CONFIG_STMMAC_ETH=m
+CONFIG_DWMAC_THEAD=m
 CONFIG_MICREL_PHY=y
 CONFIG_MICROSEMI_PHY=y
 CONFIG_MOTORCOMM_PHY=y
 CONFIG_INPUT_MOUSEDEV=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
 CONFIG_KEYBOARD_SUN4I_LRADC=m
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
@@ -155,19 +155,21 @@ CONFIG_HW_RANDOM_JH7110=m
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=m
 CONFIG_I2C_DESIGNWARE_CORE=y
-CONFIG_I2C_DESIGNWARE_PLATFORM=y
 CONFIG_I2C_MV64XXX=m
 CONFIG_SPI=y
 CONFIG_SPI_CADENCE_QUADSPI=m
 CONFIG_SPI_PL022=m
 CONFIG_SPI_SIFIVE=y
 CONFIG_SPI_SUN6I=y
 # CONFIG_PTP_1588_CLOCK is not set
+CONFIG_PINCTRL_TH1520=y
 CONFIG_PINCTRL_SOPHGO_CV1800B=y
 CONFIG_PINCTRL_SOPHGO_CV1812H=y
 CONFIG_PINCTRL_SOPHGO_SG2000=y
 CONFIG_PINCTRL_SOPHGO_SG2002=y
+CONFIG_GPIO_DWAPB=y
 CONFIG_GPIO_SIFIVE=y
+CONFIG_GPIO_SPACEMIT_K1=y
 CONFIG_POWER_RESET_GPIO_RESTART=y
 CONFIG_SENSORS_SFCTEMP=m
 CONFIG_CPU_THERMAL=y
@@ -180,6 +182,7 @@ CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_AXP20X=y
 CONFIG_REGULATOR_GPIO=y
 CONFIG_MEDIA_SUPPORT=m
+CONFIG_MEDIA_PLATFORM_SUPPORT=y
 CONFIG_VIDEO_CADENCE_CSI2RX=m
 CONFIG_DRM=m
 CONFIG_DRM_RADEON=m
@@ -191,7 +194,6 @@ CONFIG_SOUND=y
 CONFIG_SND=y
 CONFIG_SND_SOC=y
 CONFIG_SND_DESIGNWARE_I2S=m
-CONFIG_SND_SOC_STARFIVE=m
 CONFIG_SND_SOC_JH7110_PWMDAC=m
 CONFIG_SND_SOC_JH7110_TDM=m
 CONFIG_SND_SOC_WM8978=m
@@ -200,7 +202,6 @@ CONFIG_USB=y
 CONFIG_USB_OTG=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_PLATFORM=y
-# CONFIG_USB_XHCI_RCAR is not set
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_HCD_PLATFORM=y
 CONFIG_USB_OHCI_HCD=y
@@ -231,6 +232,7 @@ CONFIG_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_SDHCI_OF_DWCMSHC=y
+CONFIG_MMC_SDHCI_OF_K1=y
 CONFIG_MMC_SDHCI_CADENCE=y
 CONFIG_MMC_SPI=y
 CONFIG_MMC_DW=y
@@ -241,6 +243,7 @@ CONFIG_RTC_DRV_SUN6I=y
 CONFIG_DMADEVICES=y
 CONFIG_DMA_SUN6I=m
 CONFIG_DW_AXI_DMAC=y
+CONFIG_MMP_PDMA=m
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_BALLOON=y
 CONFIG_VIRTIO_INPUT=y
@@ -249,13 +252,18 @@ CONFIG_CLK_SOPHGO_CV1800=y
 CONFIG_CLK_SOPHGO_SG2042_PLL=y
 CONFIG_CLK_SOPHGO_SG2042_CLKGEN=y
 CONFIG_CLK_SOPHGO_SG2042_RPGATE=y
+CONFIG_SPACEMIT_CCU=y
+CONFIG_SPACEMIT_K1_CCU=y
 CONFIG_SUN8I_DE2_CCU=m
 CONFIG_SUN50I_IOMMU=y
 CONFIG_RPMSG_CHAR=y
 CONFIG_RPMSG_CTRL=y
 CONFIG_RPMSG_VIRTIO=y
 CONFIG_PM_DEVFREQ=y
 CONFIG_IIO=y
+CONFIG_PWM=y
+CONFIG_PWM_PXA=m
+CONFIG_THEAD_C900_ACLINT_SSWI=y
 CONFIG_PHY_SUN4I_USB=m
 CONFIG_PHY_STARFIVE_JH7110_DPHY_RX=m
 CONFIG_PHY_STARFIVE_JH7110_PCIE=m
@@ -292,26 +300,7 @@ CONFIG_DEFAULT_SECURITY_DAC=y
 CONFIG_CRYPTO_USER_API_HASH=y
 CONFIG_CRYPTO_DEV_VIRTIO=y
 CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_FS=y
-CONFIG_DEBUG_PAGEALLOC=y
-CONFIG_SCHED_STACK_END_CHECK=y
-CONFIG_DEBUG_VM=y
-CONFIG_DEBUG_VM_PGFLAGS=y
-CONFIG_DEBUG_MEMORY_INIT=y
-CONFIG_DEBUG_PER_CPU_MAPS=y
-CONFIG_SOFTLOCKUP_DETECTOR=y
-CONFIG_WQ_WATCHDOG=y
-CONFIG_DEBUG_TIMEKEEPING=y
-CONFIG_DEBUG_RT_MUTEXES=y
-CONFIG_DEBUG_SPINLOCK=y
-CONFIG_DEBUG_MUTEXES=y
-CONFIG_DEBUG_RWSEMS=y
-CONFIG_DEBUG_ATOMIC_SLEEP=y
-CONFIG_DEBUG_LIST=y
-CONFIG_DEBUG_PLIST=y
-CONFIG_DEBUG_SG=y
-# CONFIG_RCU_TRACE is not set
-CONFIG_RCU_EQS_DEBUG=y
-# CONFIG_FTRACE is not set
 # CONFIG_RUNTIME_TESTING_MENU is not set
 CONFIG_MEMTEST=y

arch/riscv/include/asm/irq_stack.h

@@ -12,6 +12,8 @@
 
 DECLARE_PER_CPU(ulong *, irq_stack_ptr);
 
+static DEFINE_PER_CPU(bool, irq_stack_inuse);
+
 asmlinkage void call_on_irq_stack(struct pt_regs *regs,
 				  void (*func)(struct pt_regs *));
 

arch/riscv/kernel/irq.c

@@ -87,8 +87,11 @@ static void ___do_softirq(struct pt_regs *regs)
 
 void do_softirq_own_stack(void)
 {
-	if (on_thread_stack())
+	if (on_thread_stack() && !__this_cpu_read(irq_stack_inuse)) { 
+		__this_cpu_write(irq_stack_inuse, true);
 		call_on_irq_stack(NULL, ___do_softirq);
+		__this_cpu_write(irq_stack_inuse, false);
+	}
 	else
 		__do_softirq();
 }

arch/riscv/kernel/traps.c

@@ -496,8 +496,11 @@ asmlinkage void noinstr do_irq(struct pt_regs *regs)
 {
 	irqentry_state_t state = irqentry_enter(regs);
 
-	if (IS_ENABLED(CONFIG_IRQ_STACKS) && on_thread_stack())
+	if (IS_ENABLED(CONFIG_IRQ_STACKS) && on_thread_stack() && !__this_cpu_read(irq_stack_inuse)) {
+		__this_cpu_write(irq_stack_inuse, true);
 		call_on_irq_stack(regs, handle_riscv_irq);
+		__this_cpu_write(irq_stack_inuse, false);
+	}
 	else
 		handle_riscv_irq(regs);