On Tue, Oct 18, 2011 at 1:34 AM, StephanT <stman937-linewbie@yahoo.com> wrote:
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.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
When you say an access to physical address, how are you managing to access the physical address directly?