Messages in this thread Patch in this message | | | Date | Thu, 30 Nov 2006 16:50:10 +0100 | From | Sébastien Dugué <> | Subject | Re: [PATCH -mm 3/5][AIO] - Make good_sigevent non-static |
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Make good_sigevent() non-static
Move good_sigevent() from posix-timers.c to signal.c where it belongs, and make it non-static so that it can be used by other subsystems.
include/linux/signal.h | 1 + kernel/posix-timers.c | 17 ----------------- kernel/signal.c | 24 ++++++++++++++++++++++++ 3 files changed, 25 insertions(+), 17 deletions(-)
Signed-off-by: Sébastien Dugué <sebastien.dugue@bull.net>
Index: linux-2.6.19-rc6-mm2/include/linux/signal.h =================================================================== --- linux-2.6.19-rc6-mm2.orig/include/linux/signal.h 2006-11-30 13:18:33.000000000 +0100 +++ linux-2.6.19-rc6-mm2/include/linux/signal.h 2006-11-30 13:20:13.000000000 +0100 @@ -240,6 +240,7 @@ extern int sigprocmask(int, sigset_t *, struct pt_regs; extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); +extern struct task_struct * good_sigevent(sigevent_t *); extern struct kmem_cache *sighand_cachep; Index: linux-2.6.19-rc6-mm2/kernel/posix-timers.c =================================================================== --- linux-2.6.19-rc6-mm2.orig/kernel/posix-timers.c 2006-11-30 13:18:33.000000000 +0100 +++ linux-2.6.19-rc6-mm2/kernel/posix-timers.c 2006-11-30 13:20:13.000000000 +0100 @@ -367,23 +367,6 @@ static enum hrtimer_restart posix_timer_ return ret; } -static struct task_struct * good_sigevent(sigevent_t * event) -{ - struct task_struct *rtn = current->group_leader; - - if ((event->sigev_notify & SIGEV_THREAD_ID ) && - (!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) || - rtn->tgid != current->tgid || - (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL)) - return NULL; - - if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) && - ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX))) - return NULL; - - return rtn; -} - void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock) { if ((unsigned) clock_id >= MAX_CLOCKS) { Index: linux-2.6.19-rc6-mm2/kernel/signal.c =================================================================== --- linux-2.6.19-rc6-mm2.orig/kernel/signal.c 2006-11-30 13:18:33.000000000 +0100 +++ linux-2.6.19-rc6-mm2/kernel/signal.c 2006-11-30 13:33:10.000000000 +0100 @@ -1189,6 +1189,30 @@ int group_send_sig_info(int sig, struct return ret; } +/*** + * good_sigevent - check and get target task from a sigevent. + * @event: the sigevent to be checked + * + * This function must be called with the tasklist_lock held for reading. + */ +struct task_struct * good_sigevent(sigevent_t * event) +{ + struct task_struct *task = current->group_leader; + + if ((event->sigev_notify & SIGEV_THREAD_ID ) == SIGEV_THREAD_ID) { + task = find_task_by_pid(event->sigev_notify_thread_id); + + if (!task || task->tgid != current->tgid) + return NULL; + } else if (event->sigev_notify == SIGEV_SIGNAL) { + if ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX)) + return NULL; + } else + return NULL; + + return task; +} + /* * kill_pgrp_info() sends a signal to a process group: this is what the tty * control characters do (^C, ^Z etc) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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