• Cedric Le Goater's avatar
    [PATCH] replace cad_pid by a struct pid · 9ec52099
    Cedric Le Goater authored
    
    
    There are a few places in the kernel where the init task is signaled.  The
    ctrl+alt+del sequence is one them.  It kills a task, usually init, using a
    cached pid (cad_pid).
    
    This patch replaces the pid_t by a struct pid to avoid pid wrap around
    problem.  The struct pid is initialized at boot time in init() and can be
    modified through systctl with
    
    	/proc/sys/kernel/cad_pid
    
    [ I haven't found any distro using it ? ]
    
    It also introduces a small helper routine kill_cad_pid() which is used
    where it seemed ok to use cad_pid instead of pid 1.
    
    [akpm@osdl.org: cleanups, build fix]
    Signed-off-by: default avatarCedric Le Goater <clg@fr.ibm.com>
    Cc: Eric W. Biederman <ebiederm@xmission.com>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    9ec52099