s390/fault: merge report_user_fault implementations

We have two close to identical report_user_fault functions.
Add a parameter to one and get rid of the other one in order
to reduce code duplication.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 6983722..c0f0efb 100644 (file)
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -101,6 +101,8 @@ extern void pfault_fini(void);
 #define pfault_fini()          do { } while (0)
 #endif /* CONFIG_PFAULT */
 
+void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
+
 extern void cmma_init(void);
 
 extern void (*_machine_restart)(char *command);

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 017eb03..dd97a3e 100644 (file)
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -22,8 +22,6 @@
 #include <asm/fpu/api.h>
 #include "entry.h"
 
-int show_unhandled_signals = 1;
-
 static inline void __user *get_trap_ip(struct pt_regs *regs)
 {
        unsigned long address;
@@ -35,21 +33,6 @@ static inline void __user *get_trap_ip(struct pt_regs *regs)
        return (void __user *) (address - (regs->int_code >> 16));
 }
 
-static inline void report_user_fault(struct pt_regs *regs, int signr)
-{
-       if ((task_pid_nr(current) > 1) && !show_unhandled_signals)
-               return;
-       if (!unhandled_signal(current, signr))
-               return;
-       if (!printk_ratelimit())
-               return;
-       printk("User process fault: interruption code %04x ilc:%d ",
-              regs->int_code & 0xffff, regs->int_code >> 17);
-       print_vma_addr("in ", regs->psw.addr);
-       printk("\n");
-       show_regs(regs);
-}
-
 int is_valid_bugaddr(unsigned long addr)
 {
        return 1;
@@ -65,7 +48,7 @@ void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
                info.si_code = si_code;
                info.si_addr = get_trap_ip(regs);
                force_sig_info(si_signo, &info, current);
-               report_user_fault(regs, si_signo);
+               report_user_fault(regs, si_signo, 0);
         } else {
                 const struct exception_table_entry *fixup;
                fixup = search_exception_tables(regs->psw.addr);
@@ -111,7 +94,7 @@ NOKPROBE_SYMBOL(do_per_trap);
 void default_trap_handler(struct pt_regs *regs)
 {
        if (user_mode(regs)) {
-               report_user_fault(regs, SIGSEGV);
+               report_user_fault(regs, SIGSEGV, 0);
                do_exit(SIGSEGV);
        } else
                die(regs, "Unknown program exception");

diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 791a414..64b3ad1 100644 (file)
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -183,6 +183,8 @@ static void dump_fault_info(struct pt_regs *regs)
 {
        unsigned long asce;
 
+       pr_alert("Failing address: %016lx TEID: %016lx\n",
+                regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
        pr_alert("Fault in ");
        switch (regs->int_parm_long & 3) {
        case 3:
@@ -218,7 +220,9 @@ static void dump_fault_info(struct pt_regs *regs)
        dump_pagetable(asce, regs->int_parm_long & __FAIL_ADDR_MASK);
 }
 
-static inline void report_user_fault(struct pt_regs *regs, long signr)
+int show_unhandled_signals = 1;
+
+void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault)
 {
        if ((task_pid_nr(current) > 1) && !show_unhandled_signals)
                return;
@@ -230,9 +234,8 @@ static inline void report_user_fault(struct pt_regs *regs, long signr)
               regs->int_code & 0xffff, regs->int_code >> 17);
        print_vma_addr(KERN_CONT "in ", regs->psw.addr);
        printk(KERN_CONT "\n");
-       printk(KERN_ALERT "failing address: %016lx TEID: %016lx\n",
-              regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
-       dump_fault_info(regs);
+       if (is_mm_fault)
+               dump_fault_info(regs);
        show_regs(regs);
 }
 
@@ -244,7 +247,7 @@ static noinline void do_sigsegv(struct pt_regs *regs, int si_code)
 {
        struct siginfo si;
 
-       report_user_fault(regs, SIGSEGV);
+       report_user_fault(regs, SIGSEGV, 1);
        si.si_signo = SIGSEGV;
        si.si_code = si_code;
        si.si_addr = (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK);
@@ -272,8 +275,6 @@ static noinline void do_no_context(struct pt_regs *regs)
        else
                printk(KERN_ALERT "Unable to handle kernel paging request"
                       " in virtual user address space\n");
-       printk(KERN_ALERT "failing address: %016lx TEID: %016lx\n",
-              regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
        dump_fault_info(regs);
        die(regs, "Oops");
        do_exit(SIGKILL);