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ptrace: cleanup arch_ptrace() on h8300

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Use new 'regno', 'datap' variables in order to remove duplicated
expressions and unnecessary castings. Alse remove checking @addr
less than 0 because addr is now unsigned.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Namhyung Kim 2010-10-27 15:33:53 -07:00 committed by Linus Torvalds
parent 81d3285c96
commit 05fabdace4
1 changed files with 15 additions and 15 deletions
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30
arch/h8300/kernel/ptrace.c
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@ -54,24 +54,25 @@ long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
int ret;
int regno = addr >> 2;
unsigned long __user *datap = (unsigned long __user *) data;
switch (request) {
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp = 0;
if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
if ((addr & 3) || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
ret = 0; /* Default return condition */
addr = addr >> 2; /* temporary hack. */
if (addr < H8300_REGS_NO)
tmp = h8300_get_reg(child, addr);
if (regno < H8300_REGS_NO)
tmp = h8300_get_reg(child, regno);
else {
switch(addr) {
switch (regno) {
case 49:
tmp = child->mm->start_code;
break ;
@ -89,24 +90,23 @@ long arch_ptrace(struct task_struct *child, long request,
}
}
if (!ret)
ret = put_user(tmp,(unsigned long *) data);
ret = put_user(tmp, datap);
break ;
}
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
if ((addr & 3) || addr >= sizeof(struct user)) {
ret = -EIO;
break ;
}
addr = addr >> 2; /* temporary hack. */
if (addr == PT_ORIG_ER0) {
if (regno == PT_ORIG_ER0) {
ret = -EIO;
break ;
}
if (addr < H8300_REGS_NO) {
ret = h8300_put_reg(child, addr, data);
if (regno < H8300_REGS_NO) {
ret = h8300_put_reg(child, regno, data);
break ;
}
ret = -EIO;
@ -117,11 +117,11 @@ long arch_ptrace(struct task_struct *child, long request,
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
tmp = h8300_get_reg(child, i);
if (put_user(tmp, (unsigned long *) data)) {
if (put_user(tmp, datap)) {
ret = -EFAULT;
break;
}
data += sizeof(unsigned long);
datap++;
}
ret = 0;
break;
@ -131,12 +131,12 @@ long arch_ptrace(struct task_struct *child, long request,
int i;
unsigned long tmp;
for (i = 0; i < H8300_REGS_NO; i++) {
if (get_user(tmp, (unsigned long *) data)) {
if (get_user(tmp, datap)) {
ret = -EFAULT;
break;
}
h8300_put_reg(child, i, tmp);
data += sizeof(unsigned long);
datap++;
}
ret = 0;
break;