diff options
| author | Namhyung Kim <namhyung@gmail.com> | 2010-10-27 15:33:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:11 -0700 |
| commit | 05fabdace41837a21f957507378b2954fe87ab61 (patch) | |
| tree | 1bb0e246e7786b008a44779052fa072de0955acf | |
| parent | 81d3285c96dd90044ffe2c2c5d56405a5423d753 (diff) | |
| download | linux-05fabdace41837a21f957507378b2954fe87ab61.tar.bz2 | |
ptrace: cleanup arch_ptrace() on h8300
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>
| -rw-r--r-- | arch/h8300/kernel/ptrace.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c index ef1aa0b8b20f..497fa89b5df4 100644 --- a/arch/h8300/kernel/ptrace.c +++ b/arch/h8300/kernel/ptrace.c @@ -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; |