signal: Remove task parameter from force_sigsegv

The function force_sigsegv is always called on the current task
so passing in current is redundant and not passing in current
makes this fact obvious.

This also makes it clear force_sigsegv always calls force_sig
on the current task.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index 641c364..725e556 100644 (file)
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -313,7 +313,7 @@ int elf_check_arch(const struct elf32_hdr *x)
        eflags = x->e_flags;
        if ((eflags & EF_ARC_OSABI_MSK) != EF_ARC_OSABI_CURRENT) {
                pr_err("ABI mismatch - you need newer toolchain\n");
-               force_sigsegv(SIGSEGV, current);
+               force_sigsegv(SIGSEGV);
                return 0;
        }
 

diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 6062fd1..518cceb 100644 (file)
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -257,7 +257,7 @@ setup_frame(struct ksignal *ksig, sigset_t *set, struct sigscratch *scr)
                         */
                        check_sp = (new_sp - sizeof(*frame)) & -STACK_ALIGN;
                        if (!likely(on_sig_stack(check_sp))) {
-                               force_sigsegv(ksig->sig, current);
+                               force_sigsegv(ksig->sig);
                                return 1;
                        }
                }
@@ -265,7 +265,7 @@ setup_frame(struct ksignal *ksig, sigset_t *set, struct sigscratch *scr)
        frame = (void __user *) ((new_sp - sizeof(*frame)) & -STACK_ALIGN);
 
        if (!access_ok(frame, sizeof(*frame))) {
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
                return 1;
        }
 
@@ -282,7 +282,7 @@ setup_frame(struct ksignal *ksig, sigset_t *set, struct sigscratch *scr)
        err |= setup_sigcontext(&frame->sc, set, scr);
 
        if (unlikely(err)) {
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
                return 1;
        }
 

diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index 4a81876..9bf3853 100644 (file)
--- a/arch/nios2/kernel/signal.c
+++ b/arch/nios2/kernel/signal.c
@@ -211,7 +211,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
        return 0;
 
 give_sigsegv:
-       force_sigsegv(ksig->sig, current);
+       force_sigsegv(ksig->sig);
        return -EFAULT;
 }
 

diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index e800ce1..fb431d4 100644 (file)
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -375,7 +375,7 @@ static int setup_frame32(struct ksignal *ksig, struct pt_regs *regs,
                        pr_info("%s[%d] bad frame in setup_frame32: %08lx TPC %08lx O7 %08lx\n",
                                current->comm, current->pid, (unsigned long)sf,
                                regs->tpc, regs->u_regs[UREG_I7]);
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
                return -EINVAL;
        }
 
@@ -509,7 +509,7 @@ static int setup_rt_frame32(struct ksignal *ksig, struct pt_regs *regs,
                        pr_info("%s[%d] bad frame in setup_rt_frame32: %08lx TPC %08lx O7 %08lx\n",
                                current->comm, current->pid, (unsigned long)sf,
                                regs->tpc, regs->u_regs[UREG_I7]);
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
                return -EINVAL;
        }
 

diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index ca70787..9d50190 100644 (file)
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -374,7 +374,7 @@ setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
                        pr_info("%s[%d] bad frame in setup_rt_frame: %016lx TPC %016lx O7 %016lx\n",
                                current->comm, current->pid, (unsigned long)sf,
                                regs->tpc, regs->u_regs[UREG_I7]);
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
                return -EINVAL;
        }
 

diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 7a1f2a9..29e7f5f 100644 (file)
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -119,7 +119,7 @@ void uml_setup_stubs(struct mm_struct *mm)
        return;
 
 out:
-       force_sigsegv(SIGSEGV, current);
+       force_sigsegv(SIGSEGV);
 }
 
 void arch_exit_mmap(struct mm_struct *mm)

diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 0e8b615..6460594 100644 (file)
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -169,7 +169,7 @@ static void bad_segv(struct faultinfo fi, unsigned long ip)
 
 void fatal_sigsegv(void)
 {
-       force_sigsegv(SIGSEGV, current);
+       force_sigsegv(SIGSEGV);
        do_signal(&current->thread.regs);
        /*
         * This is to tell gcc that we're not returning - do_signal

diff --git a/arch/unicore32/kernel/signal.c b/arch/unicore32/kernel/signal.c
index 63be048..75f27dc 100644 (file)
--- a/arch/unicore32/kernel/signal.c
+++ b/arch/unicore32/kernel/signal.c
@@ -386,7 +386,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
                                        regs->UCreg_pc = KERN_RESTART_CODE;
                                } else {
                                        regs->UCreg_sp += 4;
-                                       force_sigsegv(0, current);
+                                       force_sigsegv(0);
                                }
                }
                if (regs->UCreg_00 == -ERESTARTNOHAND ||

diff --git a/fs/exec.c b/fs/exec.c
index d88584e..f5568e4 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1662,7 +1662,7 @@ int search_binary_handler(struct linux_binprm *bprm)
                if (retval < 0 && !bprm->mm) {
                        /* we got to flush_old_exec() and failed after it */
                        read_unlock(&binfmt_lock);
-                       force_sigsegv(SIGSEGV, current);
+                       force_sigsegv(SIGSEGV);
                        return retval;
                }
                if (retval != -ENOEXEC || !bprm->file) {

diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index c68ca81..8af3101 100644 (file)
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -325,7 +325,7 @@ int force_sig_pkuerr(void __user *addr, u32 pkey);
 int force_sig_ptrace_errno_trap(int errno, void __user *addr);
 
 extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
-extern void force_sigsegv(int sig, struct task_struct *p);
+extern void force_sigsegv(int sig);
 extern int force_sig_info(int, struct kernel_siginfo *, struct task_struct *);
 extern int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp);
 extern int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid);

diff --git a/kernel/rseq.c b/kernel/rseq.c
index 9424ee9..e1aa3eb 100644 (file)
--- a/kernel/rseq.c
+++ b/kernel/rseq.c
@@ -277,7 +277,7 @@ void __rseq_handle_notify_resume(struct ksignal *ksig, struct pt_regs *regs)
 
 error:
        sig = ksig ? ksig->sig : 0;
-       force_sigsegv(sig, t);
+       force_sigsegv(sig);
 }
 
 #ifdef CONFIG_DEBUG_RSEQ

diff --git a/kernel/signal.c b/kernel/signal.c
index 39a3eca..f7669d2 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1607,8 +1607,10 @@ EXPORT_SYMBOL(force_sig);
  * the problem was already a SIGSEGV, we'll want to
  * make sure we don't even try to deliver the signal..
  */
-void force_sigsegv(int sig, struct task_struct *p)
+void force_sigsegv(int sig)
 {
+       struct task_struct *p = current;
+
        if (sig == SIGSEGV) {
                unsigned long flags;
                spin_lock_irqsave(&p->sighand->siglock, flags);
@@ -2717,7 +2719,7 @@ static void signal_delivered(struct ksignal *ksig, int stepping)
 void signal_setup_done(int failed, struct ksignal *ksig, int stepping)
 {
        if (failed)
-               force_sigsegv(ksig->sig, current);
+               force_sigsegv(ksig->sig);
        else
                signal_delivered(ksig, stepping);
 }