s390: make use of user_mode() macro where possible

We use the user_mode() helper already at several places but also
have the open coded variant at other places.
Convert the code to always use the helper function.

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

diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 1f6b428..619c5d3 100644 (file)
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -1531,7 +1531,7 @@ static int print_insn(char *buffer, unsigned char *code, unsigned long addr)
 
 void show_code(struct pt_regs *regs)
 {
-       char *mode = (regs->psw.mask & PSW_MASK_PSTATE) ? "User" : "Krnl";
+       char *mode = user_mode(regs) ? "User" : "Krnl";
        unsigned char code[64];
        char buffer[64], *ptr;
        mm_segment_t old_fs;
@@ -1540,7 +1540,7 @@ void show_code(struct pt_regs *regs)
 
        /* Get a snapshot of the 64 bytes surrounding the fault address. */
        old_fs = get_fs();
-       set_fs((regs->psw.mask & PSW_MASK_PSTATE) ? USER_DS : KERNEL_DS);
+       set_fs(user_mode(regs) ? USER_DS : KERNEL_DS);
        for (start = 32; start && regs->psw.addr >= 34 - start; start -= 2) {
                addr = regs->psw.addr - 34 + start;
                if (__copy_from_user(code + start - 2,

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index af2421a..01775c0 100644 (file)
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -185,7 +185,7 @@ void show_registers(struct pt_regs *regs)
 {
        char *mode;
 
-       mode = (regs->psw.mask & PSW_MASK_PSTATE) ? "User" : "Krnl";
+       mode = user_mode(regs) ? "User" : "Krnl";
        printk("%s PSW : %p %p",
               mode, (void *) regs->psw.mask,
               (void *) regs->psw.addr);
@@ -225,7 +225,7 @@ void show_regs(struct pt_regs *regs)
               (void *) current->thread.ksp);
        show_registers(regs);
        /* Show stack backtrace if pt_regs is from kernel mode */
-       if (!(regs->psw.mask & PSW_MASK_PSTATE))
+       if (!user_mode(regs))
                show_trace(NULL, (unsigned long *) regs->gprs[15]);
        show_last_breaking_event(regs);
 }
@@ -300,7 +300,7 @@ static void __kprobes do_trap(struct pt_regs *regs,
                       regs->int_code, si_signo) == NOTIFY_STOP)
                return;
 
-        if (regs->psw.mask & PSW_MASK_PSTATE) {
+       if (user_mode(regs)) {
                info.si_signo = si_signo;
                info.si_errno = 0;
                info.si_code = si_code;
@@ -341,7 +341,7 @@ void __kprobes do_per_trap(struct pt_regs *regs)
 
 static void default_trap_handler(struct pt_regs *regs)
 {
-        if (regs->psw.mask & PSW_MASK_PSTATE) {
+       if (user_mode(regs)) {
                report_user_fault(regs, SIGSEGV);
                do_exit(SIGSEGV);
        } else
@@ -410,7 +410,7 @@ static void __kprobes illegal_op(struct pt_regs *regs)
 
        location = get_psw_address(regs);
 
-       if (regs->psw.mask & PSW_MASK_PSTATE) {
+       if (user_mode(regs)) {
                if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
                        return;
                if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
@@ -478,7 +478,7 @@ void specification_exception(struct pt_regs *regs)
 
        location = (__u16 __user *) get_psw_address(regs);
 
-        if (regs->psw.mask & PSW_MASK_PSTATE) {
+       if (user_mode(regs)) {
                get_user(*((__u16 *) opcode), location);
                switch (opcode[0]) {
                case 0x28: /* LDR Rx,Ry   */
@@ -531,7 +531,7 @@ static void data_exception(struct pt_regs *regs)
                asm volatile("stfpc %0" : "=m" (current->thread.fp_regs.fpc));
 
 #ifdef CONFIG_MATHEMU
-        else if (regs->psw.mask & PSW_MASK_PSTATE) {
+       else if (user_mode(regs)) {
                __u8 opcode[6];
                get_user(*((__u16 *) opcode), location);
                switch (opcode[0]) {
@@ -598,7 +598,7 @@ static void data_exception(struct pt_regs *regs)
 static void space_switch_exception(struct pt_regs *regs)
 {
        /* Set user psw back to home space mode. */
-       if (regs->psw.mask & PSW_MASK_PSTATE)
+       if (user_mode(regs))
                regs->psw.mask |= PSW_ASC_HOME;
        /* Send SIGILL. */
        do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event");

diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 5bddbe4..6c013f5 100644 (file)
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -220,7 +220,7 @@ static noinline void do_fault_error(struct pt_regs *regs, int fault)
        case VM_FAULT_BADACCESS:
        case VM_FAULT_BADMAP:
                /* Bad memory access. Check if it is kernel or user space. */
-               if (regs->psw.mask & PSW_MASK_PSTATE) {
+               if (user_mode(regs)) {
                        /* User mode accesses just cause a SIGSEGV */
                        si_code = (fault == VM_FAULT_BADMAP) ?
                                SEGV_MAPERR : SEGV_ACCERR;
@@ -236,13 +236,13 @@ static noinline void do_fault_error(struct pt_regs *regs, int fault)
                break;
        default: /* fault & VM_FAULT_ERROR */
                if (fault & VM_FAULT_OOM) {
-                       if (!(regs->psw.mask & PSW_MASK_PSTATE))
+                       if (!user_mode(regs))
                                do_no_context(regs);
                        else
                                pagefault_out_of_memory();
                } else if (fault & VM_FAULT_SIGBUS) {
                        /* Kernel mode? Handle exceptions or die */
-                       if (!(regs->psw.mask & PSW_MASK_PSTATE))
+                       if (!user_mode(regs))
                                do_no_context(regs);
                        else
                                do_sigbus(regs);
@@ -436,7 +436,7 @@ void __kprobes do_asce_exception(struct pt_regs *regs)
        }
 
        /* User mode accesses just cause a SIGSEGV */
-       if (regs->psw.mask & PSW_MASK_PSTATE) {
+       if (user_mode(regs)) {
                do_sigsegv(regs, SEGV_MAPERR);
                return;
        }

diff --git a/arch/s390/oprofile/backtrace.c b/arch/s390/oprofile/backtrace.c
index c82f62f..8a6811b 100644 (file)
--- a/arch/s390/oprofile/backtrace.c
+++ b/arch/s390/oprofile/backtrace.c
@@ -58,7 +58,7 @@ void s390_backtrace(struct pt_regs * const regs, unsigned int depth)
        unsigned long head;
        struct stack_frame* head_sf;
 
-       if (user_mode (regs))
+       if (user_mode(regs))
                return;
 
        head = regs->gprs[15];