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ptrace: cleanup arch_ptrace() on x86 

Remove checking @addr less than 0 because @addr is now unsigned and
use new udescp variable in order to remove unnecessary castings.

[akpm@linux-foundation.org: fix unused variable 'udescp']
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
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 15:33:48 -07:00 committed by Linus Torvalds
parent 9b05a69e05
commit eb5a369931
1 changed files with 4 additions and 6 deletions
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10
arch/x86/kernel/ptrace.c
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@ -813,8 +813,7 @@ long arch_ptrace(struct task_struct *child, long request,
unsigned long tmp;
ret = -EIO;
if ((addr & (sizeof(data) - 1)) || addr < 0 ||
addr >= sizeof(struct user))
if ((addr & (sizeof(data) - 1)) || addr >= sizeof(struct user))
break;
tmp = 0; /* Default return condition */
@ -831,8 +830,7 @@ long arch_ptrace(struct task_struct *child, long request,
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
ret = -EIO;
if ((addr & (sizeof(data) - 1)) || addr < 0 ||
addr >= sizeof(struct user))
if ((addr & (sizeof(data) - 1)) || addr >= sizeof(struct user))
break;
if (addr < sizeof(struct user_regs_struct))
@ -892,14 +890,14 @@ long arch_ptrace(struct task_struct *child, long request,
if ((int) addr < 0)
return -EIO;
ret = do_get_thread_area(child, addr,
(struct user_desc __user *) data);
(struct user_desc __user *)data);
break;
case PTRACE_SET_THREAD_AREA:
if ((int) addr < 0)
return -EIO;
ret = do_set_thread_area(child, addr,
(struct user_desc __user *) data, 0);
(struct user_desc __user *)data, 0);
break;
#endif