From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- arch/arm/mach-s3c/devs.c | 399 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 399 insertions(+) create mode 100644 arch/arm/mach-s3c/devs.c (limited to 'arch/arm/mach-s3c/devs.c') diff --git a/arch/arm/mach-s3c/devs.c b/arch/arm/mach-s3c/devs.c new file mode 100644 index 000000000..572b15664 --- /dev/null +++ b/arch/arm/mach-s3c/devs.c @@ -0,0 +1,399 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2011 Samsung Electronics Co., Ltd. +// http://www.samsung.com +// +// Base Samsung platform device definitions + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "irqs.h" +#include "map.h" +#include "gpio-samsung.h" +#include "gpio-cfg.h" + +#include "cpu.h" +#include "devs.h" +#include "fb.h" +#include +#include "keypad.h" +#include "pwm-core.h" +#include "sdhci.h" +#include "usb-phy.h" +#include +#include + +#define samsung_device_dma_mask (*((u64[]) { DMA_BIT_MASK(32) })) + +/* FB */ + +#ifdef CONFIG_S3C_DEV_FB +static struct resource s3c_fb_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_FB, SZ_16K), + [1] = DEFINE_RES_IRQ(IRQ_LCD_VSYNC), + [2] = DEFINE_RES_IRQ(IRQ_LCD_FIFO), + [3] = DEFINE_RES_IRQ(IRQ_LCD_SYSTEM), +}; + +struct platform_device s3c_device_fb = { + .name = "s3c-fb", + .id = -1, + .num_resources = ARRAY_SIZE(s3c_fb_resource), + .resource = s3c_fb_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +void __init s3c_fb_set_platdata(struct s3c_fb_platdata *pd) +{ + s3c_set_platdata(pd, sizeof(struct s3c_fb_platdata), + &s3c_device_fb); +} +#endif /* CONFIG_S3C_DEV_FB */ + +/* HSMMC */ + +#ifdef CONFIG_S3C_DEV_HSMMC +static struct resource s3c_hsmmc_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_HSMMC0, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_HSMMC0), +}; + +struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata = { + .max_width = 4, + .host_caps = (MMC_CAP_4_BIT_DATA | + MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED), +}; + +struct platform_device s3c_device_hsmmc0 = { + .name = "s3c-sdhci", + .id = 0, + .num_resources = ARRAY_SIZE(s3c_hsmmc_resource), + .resource = s3c_hsmmc_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c_hsmmc0_def_platdata, + }, +}; + +void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd) +{ + s3c_sdhci_set_platdata(pd, &s3c_hsmmc0_def_platdata); +} +#endif /* CONFIG_S3C_DEV_HSMMC */ + +#ifdef CONFIG_S3C_DEV_HSMMC1 +static struct resource s3c_hsmmc1_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_HSMMC1, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_HSMMC1), +}; + +struct s3c_sdhci_platdata s3c_hsmmc1_def_platdata = { + .max_width = 4, + .host_caps = (MMC_CAP_4_BIT_DATA | + MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED), +}; + +struct platform_device s3c_device_hsmmc1 = { + .name = "s3c-sdhci", + .id = 1, + .num_resources = ARRAY_SIZE(s3c_hsmmc1_resource), + .resource = s3c_hsmmc1_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c_hsmmc1_def_platdata, + }, +}; + +void s3c_sdhci1_set_platdata(struct s3c_sdhci_platdata *pd) +{ + s3c_sdhci_set_platdata(pd, &s3c_hsmmc1_def_platdata); +} +#endif /* CONFIG_S3C_DEV_HSMMC1 */ + +/* HSMMC2 */ + +#ifdef CONFIG_S3C_DEV_HSMMC2 +static struct resource s3c_hsmmc2_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_HSMMC2, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_HSMMC2), +}; + +struct s3c_sdhci_platdata s3c_hsmmc2_def_platdata = { + .max_width = 4, + .host_caps = (MMC_CAP_4_BIT_DATA | + MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED), +}; + +struct platform_device s3c_device_hsmmc2 = { + .name = "s3c-sdhci", + .id = 2, + .num_resources = ARRAY_SIZE(s3c_hsmmc2_resource), + .resource = s3c_hsmmc2_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c_hsmmc2_def_platdata, + }, +}; + +void s3c_sdhci2_set_platdata(struct s3c_sdhci_platdata *pd) +{ + s3c_sdhci_set_platdata(pd, &s3c_hsmmc2_def_platdata); +} +#endif /* CONFIG_S3C_DEV_HSMMC2 */ + +#ifdef CONFIG_S3C_DEV_HSMMC3 +static struct resource s3c_hsmmc3_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_HSMMC3, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_HSMMC3), +}; + +struct s3c_sdhci_platdata s3c_hsmmc3_def_platdata = { + .max_width = 4, + .host_caps = (MMC_CAP_4_BIT_DATA | + MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED), +}; + +struct platform_device s3c_device_hsmmc3 = { + .name = "s3c-sdhci", + .id = 3, + .num_resources = ARRAY_SIZE(s3c_hsmmc3_resource), + .resource = s3c_hsmmc3_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c_hsmmc3_def_platdata, + }, +}; + +void s3c_sdhci3_set_platdata(struct s3c_sdhci_platdata *pd) +{ + s3c_sdhci_set_platdata(pd, &s3c_hsmmc3_def_platdata); +} +#endif /* CONFIG_S3C_DEV_HSMMC3 */ + +/* I2C */ + +static struct resource s3c_i2c0_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_IIC, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_IIC), +}; + +struct platform_device s3c_device_i2c0 = { + .name = "s3c2410-i2c", + .id = 0, + .num_resources = ARRAY_SIZE(s3c_i2c0_resource), + .resource = s3c_i2c0_resource, +}; + +struct s3c2410_platform_i2c default_i2c_data __initdata = { + .flags = 0, + .slave_addr = 0x10, + .frequency = 100*1000, + .sda_delay = 100, +}; + +void __init s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *pd) +{ + struct s3c2410_platform_i2c *npd; + + if (!pd) { + pd = &default_i2c_data; + pd->bus_num = 0; + } + + npd = s3c_set_platdata(pd, sizeof(*npd), &s3c_device_i2c0); + + if (!npd->cfg_gpio) + npd->cfg_gpio = s3c_i2c0_cfg_gpio; +} + +#ifdef CONFIG_S3C_DEV_I2C1 +static struct resource s3c_i2c1_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_IIC1, SZ_4K), + [1] = DEFINE_RES_IRQ(IRQ_IIC1), +}; + +struct platform_device s3c_device_i2c1 = { + .name = "s3c2410-i2c", + .id = 1, + .num_resources = ARRAY_SIZE(s3c_i2c1_resource), + .resource = s3c_i2c1_resource, +}; + +void __init s3c_i2c1_set_platdata(struct s3c2410_platform_i2c *pd) +{ + struct s3c2410_platform_i2c *npd; + + if (!pd) { + pd = &default_i2c_data; + pd->bus_num = 1; + } + + npd = s3c_set_platdata(pd, sizeof(*npd), &s3c_device_i2c1); + + if (!npd->cfg_gpio) + npd->cfg_gpio = s3c_i2c1_cfg_gpio; +} +#endif /* CONFIG_S3C_DEV_I2C1 */ + +/* KEYPAD */ + +#ifdef CONFIG_SAMSUNG_DEV_KEYPAD +static struct resource samsung_keypad_resources[] = { + [0] = DEFINE_RES_MEM(SAMSUNG_PA_KEYPAD, SZ_32), + [1] = DEFINE_RES_IRQ(IRQ_KEYPAD), +}; + +struct platform_device samsung_device_keypad = { + .name = "samsung-keypad", + .id = -1, + .num_resources = ARRAY_SIZE(samsung_keypad_resources), + .resource = samsung_keypad_resources, +}; + +void __init samsung_keypad_set_platdata(struct samsung_keypad_platdata *pd) +{ + struct samsung_keypad_platdata *npd; + + npd = s3c_set_platdata(pd, sizeof(*npd), &samsung_device_keypad); + + if (!npd->cfg_gpio) + npd->cfg_gpio = samsung_keypad_cfg_gpio; +} +#endif /* CONFIG_SAMSUNG_DEV_KEYPAD */ + +/* PWM Timer */ + +#ifdef CONFIG_SAMSUNG_DEV_PWM +static struct resource samsung_pwm_resource[] = { + DEFINE_RES_MEM(SAMSUNG_PA_TIMER, SZ_4K), +}; + +struct platform_device samsung_device_pwm = { + .name = "samsung-pwm", + .id = -1, + .num_resources = ARRAY_SIZE(samsung_pwm_resource), + .resource = samsung_pwm_resource, +}; + +void __init samsung_pwm_set_platdata(struct samsung_pwm_variant *pd) +{ + samsung_device_pwm.dev.platform_data = pd; +} +#endif /* CONFIG_SAMSUNG_DEV_PWM */ + +/* USB */ + +#ifdef CONFIG_S3C_DEV_USB_HOST +static struct resource s3c_usb_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_USBHOST, SZ_256), + [1] = DEFINE_RES_IRQ(IRQ_USBH), +}; + +struct platform_device s3c_device_ohci = { + .name = "s3c2410-ohci", + .id = -1, + .num_resources = ARRAY_SIZE(s3c_usb_resource), + .resource = s3c_usb_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + } +}; +#endif /* CONFIG_S3C_DEV_USB_HOST */ + +/* USB HSOTG */ + +#ifdef CONFIG_S3C_DEV_USB_HSOTG +static struct resource s3c_usb_hsotg_resources[] = { + [0] = DEFINE_RES_MEM(S3C_PA_USB_HSOTG, SZ_128K), + [1] = DEFINE_RES_IRQ(IRQ_OTG), +}; + +struct platform_device s3c_device_usb_hsotg = { + .name = "s3c-hsotg", + .id = -1, + .num_resources = ARRAY_SIZE(s3c_usb_hsotg_resources), + .resource = s3c_usb_hsotg_resources, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +void __init dwc2_hsotg_set_platdata(struct dwc2_hsotg_plat *pd) +{ + struct dwc2_hsotg_plat *npd; + + npd = s3c_set_platdata(pd, sizeof(*npd), &s3c_device_usb_hsotg); + + if (!npd->phy_init) + npd->phy_init = s3c_usb_phy_init; + if (!npd->phy_exit) + npd->phy_exit = s3c_usb_phy_exit; +} +#endif /* CONFIG_S3C_DEV_USB_HSOTG */ + +#ifdef CONFIG_S3C64XX_DEV_SPI0 +static struct resource s3c64xx_spi0_resource[] = { + [0] = DEFINE_RES_MEM(S3C_PA_SPI0, SZ_256), + [1] = DEFINE_RES_IRQ(IRQ_SPI0), +}; + +struct platform_device s3c64xx_device_spi0 = { + .name = "s3c6410-spi", + .id = 0, + .num_resources = ARRAY_SIZE(s3c64xx_spi0_resource), + .resource = s3c64xx_spi0_resource, + .dev = { + .dma_mask = &samsung_device_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +void __init s3c64xx_spi0_set_platdata(int src_clk_nr, int num_cs) +{ + struct s3c64xx_spi_info pd; + + /* Reject invalid configuration */ + if (!num_cs || src_clk_nr < 0) { + pr_err("%s: Invalid SPI configuration\n", __func__); + return; + } + + pd.num_cs = num_cs; + pd.src_clk_nr = src_clk_nr; + pd.cfg_gpio = s3c64xx_spi0_cfg_gpio; + + s3c_set_platdata(&pd, sizeof(pd), &s3c64xx_device_spi0); +} +#endif /* CONFIG_S3C64XX_DEV_SPI0 */ -- cgit v1.3.1