virtual -->physical --> virtual address
ratheesh kannoth <[email protected]>
| Newsgroups | org.kernel.vger.linux-newbie,org.kernel.vger.linux-c-programming |
|---|---|
| Message-ID | <CAGZFCEHW9Rpk8ZaFbaQPMeA_jOGFnFsnyqXg8QYJs+T+WpxpKw@mail.gmail.com> |
{
virtual_addr1 = kmalloc(0x20, GFP_USER);
phy_addr1 = __pa(virtual_addr1 );
virtual_addr2 = ioremap(phy_addr1, 0x20 );
}
I noticed that virtual_addr1 is not equal to virtual_addr2. And if i
dereference virtual_addr2 ( *virtual_addr2 ),
kernel crash. What is wrong here ?
-Ratheesh