From: Oleg Nesterov This patch replaces hardcoded SEND_SIG_xxx constants with their symbolic names. No changes in affected .o files. Signed-off-by: Oleg Nesterov Signed-off-by: Andrew Morton --- kernel/exit.c | 10 +++++----- kernel/signal.c | 35 ++++++++++++++++++++--------------- security/selinux/hooks.c | 4 ++-- 3 files changed, 27 insertions(+), 22 deletions(-) diff -puN kernel/exit.c~remove-hardcoded-send_sig_xxx-constants kernel/exit.c --- devel/kernel/exit.c~remove-hardcoded-send_sig_xxx-constants 2005-10-14 00:50:59.000000000 -0700 +++ devel-akpm/kernel/exit.c 2005-10-14 00:50:59.000000000 -0700 @@ -547,7 +547,7 @@ static inline void reparent_thread(task_ if (p->pdeath_signal) /* We already hold the tasklist_lock here. */ - group_send_sig_info(p->pdeath_signal, (void *) 0, p); + group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p); /* Move the child from its dying parent to the new one. */ if (unlikely(traced)) { @@ -591,8 +591,8 @@ static inline void reparent_thread(task_ int pgrp = process_group(p); if (will_become_orphaned_pgrp(pgrp, NULL) && has_stopped_jobs(pgrp)) { - __kill_pg_info(SIGHUP, (void *)1, pgrp); - __kill_pg_info(SIGCONT, (void *)1, pgrp); + __kill_pg_info(SIGHUP, SEND_SIG_PRIV, pgrp); + __kill_pg_info(SIGCONT, SEND_SIG_PRIV, pgrp); } } } @@ -727,8 +727,8 @@ static void exit_notify(struct task_stru (t->signal->session == tsk->signal->session) && will_become_orphaned_pgrp(process_group(tsk), tsk) && has_stopped_jobs(process_group(tsk))) { - __kill_pg_info(SIGHUP, (void *)1, process_group(tsk)); - __kill_pg_info(SIGCONT, (void *)1, process_group(tsk)); + __kill_pg_info(SIGHUP, SEND_SIG_PRIV, process_group(tsk)); + __kill_pg_info(SIGCONT, SEND_SIG_PRIV, process_group(tsk)); } /* Let father know we died diff -puN kernel/signal.c~remove-hardcoded-send_sig_xxx-constants kernel/signal.c --- devel/kernel/signal.c~remove-hardcoded-send_sig_xxx-constants 2005-10-14 00:50:59.000000000 -0700 +++ devel-akpm/kernel/signal.c 2005-10-14 00:50:59.000000000 -0700 @@ -661,8 +661,9 @@ static int check_kill_permission(int sig if (!valid_signal(sig)) return error; error = -EPERM; - if ((!info || ((unsigned long)info != 1 && - (unsigned long)info != 2 && SI_FROMUSER(info))) + if ((info == SEND_SIG_NOINFO || + (info != SEND_SIG_PRIV && info != SEND_SIG_FORCED + && SI_FROMUSER(info))) && ((sig != SIGCONT) || (current->signal->session != t->signal->session)) && (current->euid ^ t->suid) && (current->euid ^ t->uid) @@ -799,7 +800,7 @@ static int send_signal(int sig, struct s * fast-pathed signals for kernel-internal things like SIGSTOP * or SIGKILL. */ - if ((unsigned long)info == 2) + if (info == SEND_SIG_FORCED) goto out_set; /* Real-time signals must be queued if sent by sigqueue, or @@ -811,19 +812,19 @@ static int send_signal(int sig, struct s pass on the info struct. */ q = __sigqueue_alloc(t, GFP_ATOMIC, (sig < SIGRTMIN && - ((unsigned long) info < 2 || + (info < SEND_SIG_FORCED || info->si_code >= 0))); if (q) { list_add_tail(&q->list, &signals->list); switch ((unsigned long) info) { - case 0: + case (unsigned long) SEND_SIG_NOINFO: q->info.si_signo = sig; q->info.si_errno = 0; q->info.si_code = SI_USER; q->info.si_pid = current->pid; q->info.si_uid = current->uid; break; - case 1: + case (unsigned long) SEND_SIG_PRIV: q->info.si_signo = sig; q->info.si_errno = 0; q->info.si_code = SI_KERNEL; @@ -835,14 +836,15 @@ static int send_signal(int sig, struct s break; } } else { - if (sig >= SIGRTMIN && info && (unsigned long)info != 1 + if (sig >= SIGRTMIN + && info != SEND_SIG_NOINFO && info != SEND_SIG_PRIV && info->si_code != SI_USER) /* * Queue overflow, abort. We may abort if the signal was rt * and sent by user using something other than kill(). */ return -EAGAIN; - if (((unsigned long)info > 1) && (info->si_code == SI_TIMER)) + if ((info > SEND_SIG_PRIV) && (info->si_code == SI_TIMER)) /* * Set up a return to indicate that we dropped * the signal. @@ -868,7 +870,7 @@ specific_send_sig_info(int sig, struct s BUG(); assert_spin_locked(&t->sighand->siglock); - if (((unsigned long)info > 2) && (info->si_code == SI_TIMER)) + if ((info > SEND_SIG_FORCED) && (info->si_code == SI_TIMER)) /* * Set up a return to indicate that we dropped the signal. */ @@ -924,7 +926,7 @@ force_sig_specific(int sig, struct task_ t->sighand->action[sig-1].sa.sa_handler = SIG_DFL; sigdelset(&t->blocked, sig); recalc_sigpending_tsk(t); - specific_send_sig_info(sig, (void *)2, t); + specific_send_sig_info(sig, SEND_SIG_FORCED, t); spin_unlock_irqrestore(&t->sighand->siglock, flags); } @@ -1060,7 +1062,7 @@ __group_send_sig_info(int sig, struct si assert_spin_locked(&p->sighand->siglock); handle_stop_signal(sig, p); - if (((unsigned long)info > 2) && (info->si_code == SI_TIMER)) + if ((info > SEND_SIG_FORCED) && (info->si_code == SI_TIMER)) /* * Set up a return to indicate that we dropped the signal. */ @@ -1295,10 +1297,13 @@ send_sig_info(int sig, struct siginfo *i return ret; } +#define __si_special(priv) \ + ((priv) ? SEND_SIG_PRIV : SEND_SIG_NOINFO) + int send_sig(int sig, struct task_struct *p, int priv) { - return send_sig_info(sig, (void*)(long)(priv != 0), p); + return send_sig_info(sig, __si_special(priv), p); } /* @@ -1318,7 +1323,7 @@ send_group_sig_info(int sig, struct sigi void force_sig(int sig, struct task_struct *p) { - force_sig_info(sig, (void*)1L, p); + force_sig_info(sig, SEND_SIG_PRIV, p); } /* @@ -1343,13 +1348,13 @@ force_sigsegv(int sig, struct task_struc int kill_pg(pid_t pgrp, int sig, int priv) { - return kill_pg_info(sig, (void *)(long)(priv != 0), pgrp); + return kill_pg_info(sig, __si_special(priv), pgrp); } int kill_proc(pid_t pid, int sig, int priv) { - return kill_proc_info(sig, (void *)(long)(priv != 0), pid); + return kill_proc_info(sig, __si_special(priv), pid); } /* diff -puN security/selinux/hooks.c~remove-hardcoded-send_sig_xxx-constants security/selinux/hooks.c --- devel/security/selinux/hooks.c~remove-hardcoded-send_sig_xxx-constants 2005-10-14 00:50:59.000000000 -0700 +++ devel-akpm/security/selinux/hooks.c 2005-10-14 00:50:59.000000000 -0700 @@ -2713,8 +2713,8 @@ static int selinux_task_kill(struct task if (rc) return rc; - if (info && ((unsigned long)info == 1 || - (unsigned long)info == 2 || SI_FROMKERNEL(info))) + if (info != SEND_SIG_NOINFO && (info == SEND_SIG_PRIV || + info == SEND_SIG_FORCED || SI_FROMKERNEL(info))) return 0; if (!sig) _