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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>
This commit is contained in:
Heiko Carstens 2012-07-27 10:31:12 +02:00 committed by Martin Schwidefsky
parent 37fe1d73a4
commit 7d25617597
4 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/s390/kernel/dis.c
View File

@ -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,

16
arch/s390/kernel/traps.c
View File

@ -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");

8
arch/s390/mm/fault.c
View File

@ -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;
}

2
arch/s390/oprofile/backtrace.c
View File

@ -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];