On Fri, Nov 15, 2013 at 6:24 PM, Paul Davies C <[email protected]> wrote: > Hi, > I happen to find this code snippet in the kernel source : > > struct mm_struct *mm=current->mm; > > /* some other code */ > > if(mm){ /*<==Why is this here? */ > /*read the contents by locking*/ > } > > The if checks whether the mm_struct of the current process is NULL or not. > That means the mm_struct of a process can become NULL. How can that happen?
mm_struct points to a process address space. It is NULL for kernel threads. Daniel. _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
