dev_err(&pdev->dev, "Failed to get memory resource\n"); return -ENXIO; } // 步骤二:调用devm_platform_ioremap_resource函数 regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(regs)) { dev_err(&pdev->dev, "Failed to ioremap resource\n"); return PTR_ERR(regs); } // ...
devm_platform_ioremap_resource 释放 开发中,如果代码不规范很容易产生内存泄漏,比如Handler、Context、线程等使用。本文使用Android Studio自带的Profiler和MAT工具进行内存泄漏分析。 一、内存泄漏 1、定义handler private Handler mHandler = new Handler(new Handler.Callback() { @Override public boolean handleMessage...
devm_ioremap 与 devm_ioremap_resource 的区别 1. devm_ioremap 函数的作用和用法 devm_ioremap 是Linux 内核中的一个函数,用于将物理地址映射到内核虚拟地址空间。这个函数通常用于设备驱动程序中,以便驱动程序可以访问设备的内存或 I/O 资源。与 ioremap 相比,devm_ioremap 会自动管理映射的生命周期,当设备被移除...
devm_platform_ioremap_resource(struct platform_device *pdev, unsigned int index); extern int platform_get_irq(struct platform_device *, unsigned int); extern int platform_irq_count(struct platform_device *); extern struct resource *platform_get_resource_byname(struct platform_device *,0...
structresource*r; intret; priv=devm_kzalloc(&pdev->dev,sizeof(structi2c_au1550_data), GFP_KERNEL); if(!priv) return-ENOMEM; r=platform_get_resource(pdev,IORESOURCE_MEM,0); priv->psc_base=devm_ioremap_resource(&pdev->dev,r); ...
drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(drvdata->virt_base)) return PTR_ERR(drvdata->virt_base); res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); ---分配IRQ资源 if (res) drvdata->irq = res->start; ret ...
1:externvoid*devm_kzalloc(structdevice *dev, size_t size, gfp_t gfp);2:3:void__iomem *devm_ioremap_resource(structdevice *dev,4:structresource *res);5:void__iomem *devm_ioremap(structdevice *dev, resource_size_t offset,6: unsignedlongsize);7:8:structclk *devm_clk_get(structdevice ...
\n"); fmc = devm_kzalloc(dev, sizeof(*fmc), GFP_KERNEL); if (!...ENOMEM; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "control"); fmc->regbase = devm_ioremap_resource...regbase); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "memory"); fmc->iobase =...
最新的linux内核提供了像devm_get_free_pages()、devm_kmalloc()或devm_ioremap()这样的设备管理资源分配。虽然我可以自己实现它,但我想知道为什么还没有devm_vmalloc()。 浏览1提问于2016-03-18得票数 0 1回答 rmmod的时候需要devm_iounmap吗,哪个模块使用devm* api? 、、 devm_ioremap()应用程序接口使用设备...
*x = devm_ioremap(...) ... iounmap(x); // </smpl> Signed-off-by: Julia Lawall <***@lip6.fr> --- Not compiled. Does free_irq actually have to be called before irq_dispose_mapping? drivers/dma/sirf-dma.c | 23 +++++--- 1 file changed, 7 insertions...