Hi,
I am trying to get a page from RAM write some values in it in kernel
space and then read them in user space using mmap.
Below is the code i use, to fill the memory with a pattern in kernel space.
ptr =get_zeroed_page (__GFP_DMA);
printk("Peerless:The Virtual addr ptr: %08lx \n",ptr);
phyaddr = virt_to_phys(ptr);
printk("Phy addr is :%08lx \n",phyaddr);
printk(" Virtual addr s :%08lx \n",phys_to_virt(phyaddr) );
printk("At %x is %x \n",phyaddr,(*ptr));
memset(ptr,0xaabb,4096);
printk("At %ld is %x \n",phyaddr,(*ptr));
printk("At %ld is %x \n",++phyaddr,++(*ptr));
But when i insmod the above module I dont see the pattern 0xaabb in
the printk's. Guess I am missing the basics.Help will be greatly
appreciated.
Thanks
Deepak
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