warning: assignment makes pointer from integer without a cast
error:
../../../../../../kernel/generic/android_x86_64/arch/x86/kernel/pci-dma.c:105:8: warning: assignment makes pointer from integer without a cast
error, forbidden warning: pci-dma.c:105
solution:
函数声明要在调用之前
否则,未经声明的函数原型一律默认为返回int值
所以,要包含相应的头文件