函数源码

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source File:kernel\dma\debug.c Create Date:2022-07-27 11:35:02
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void debug_dma_map_single(struct device *dev, const void *addr,
                unsigned long len)
{
    if (unlikely(dma_debug_disabled()))
        return;
 
    if (!virt_addr_valid(addr))
        err_printk(dev, NULL, "device driver maps memory from invalid area [addr=%p] [len=%lu]\n",
               addr, len);
 
    if (is_vmalloc_addr(addr))
        err_printk(dev, NULL, "device driver maps memory from vmalloc area [addr=%p] [len=%lu]\n",
               addr, len);
}