Hi all,
In a kernel module is there a way to test if an address range has
been already mapped by the kernel or not.
Ex: (on a PC with the latest kernel)
- an access to physical 0xC0000000 will return the value at this address
- an access to physical 0x00100000 will have the kernel kill the module/application
using the module. Dmesg: BUG: unable to handle kernel paging request at 00100000.
How can I test this condition before dereferencing the
address.
Thanks,
Stephan.
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