only called from a process context (i.e. not from an interrupt handler
or bottom half).
- alloc_inode: this method is called by inode_alloc() to allocate memory
+ alloc_inode: this method is called by alloc_inode() to allocate memory
for struct inode and initialize it. If this function is not
defined, a simple 'struct inode' is allocated. Normally
alloc_inode will be used to allocate a larger structure which