static int dsi_panel_set_backlight_external(int value){ int ret = 0; ret = kthread_run(lcd_bl_set_led_brightness, (void *)value, "lcd_bl_set_led_brightness"); if (ret < 0) { pr_err("Failed to create lcd_bl_set_led_brightness thread\n"); } ret = kthread_run(lcd_bias_set_led_brightness, (void *)value, "lcd_bias_set_led_brightness"); if (ret < 0) { pr_err("Failed to create lcd_bias_set_led_brightness thread\n"); } return ret;}这个代码会有kernel/msm-4.19/techpack/display/msm/dsi/dsi_panel.c:761:47: warning: cast to 'void *' from smaller integer type 'int' [-Wint-to-void-pointer-cast] error, forbidden warning: dsi_panel.c:761这个报错，该怎么解决

这个编译警告的原因是函数 `kthread_run()` 的第二个参数需要传入 `void*` 类型的指针，而在这个代码中，value 是一个整型变量，需要转换成 `void*` 类型的指针。你可以使用 `intptr_t` 类型来完成这个转换，它可以安全地将一个整型变量转换成指针类型。修改后的代码如下：

static int dsi_panel_set_backlight_external(int value)
{
    int ret = 0;
    ret = kthread_run(lcd_bl_set_led_brightness, (void *)(intptr_t)value, "lcd_bl_set_led_brightness");
    if (ret < 0) {
        pr_err("Failed to create lcd_bl_set_led_brightness thread\n");
    }
    ret = kthread_run(lcd_bias_set_led_brightness, (void *)(intptr_t)value, "lcd_bias_set_led_brightness");
    if (ret < 0) {
        pr_err("Failed to create lcd_bias_set_led_brightness thread\n");
    }
    return ret;
}

这个修改会把整型变量 value 转换成一个 intptr_t 类型的指针，然后再传给 `kthread_run()` 函数。这样就可以消除这个编译警告了。