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signal: Factor force_sig_info_to_task out of force_sig_info

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All callers of force_sig_info pass info.si_signo in for the signal
by definition as well as in practice.

Further all callers of force_sig_info except force_sig_fault_to_task
pass current as the target task to force_sig_info.

Factor out a static force_sig_info_to_task that
force_sig_fault_to_task can call.

This prepares the way for force_sig_info to have it's task and signal
parameters removed.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2019-02-07 11:01:20 -06:00
parent ffafd23b2c
commit 59c0e696a6
1 changed files with 9 additions and 3 deletions
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12
kernel/signal.c
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@ -1294,12 +1294,13 @@ int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p
* We don't want to have recursive SIGSEGV's etc, for example,
* that is why we also clear SIGNAL_UNKILLABLE.
*/
int
force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
static int
force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
{
unsigned long int flags;
int ret, blocked, ignored;
struct k_sigaction *action;
int sig = info->si_signo;
spin_lock_irqsave(&t->sighand->siglock, flags);
action = &t->sighand->action[sig-1];
@ -1324,6 +1325,11 @@ force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
return ret;
}
int force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
{
return force_sig_info_to_task(info, t);
}
/*
* Nuke all other threads in the group.
*/
@ -1656,7 +1662,7 @@ int force_sig_fault_to_task(int sig, int code, void __user *addr
info.si_flags = flags;
info.si_isr = isr;
#endif
return force_sig_info(info.si_signo, &info, t);
return force_sig_info_to_task(&info, t);
}
int force_sig_fault(int sig, int code, void __user *addr