From: Namhyung Kim Date: Wed, 27 Oct 2010 22:34:03 +0000 (-0700) Subject: ptrace: cleanup arch_ptrace() on sh X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9e1cb20619d8037248b6a776f777600c3584a8d5;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git ptrace: cleanup arch_ptrace() on sh Remove unnecessary castings and get rid of dummy pointer in favor of offsetof() macro in ptrace_32.c. Also use temporary variables and break long lines in order to improve readability. Signed-off-by: Namhyung Kim Cc: Paul Mundt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c index 34bf03745e86..90a15d29feeb 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -368,7 +368,6 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task) long arch_ptrace(struct task_struct *child, long request, unsigned long addr, unsigned long data) { - struct user * dummy = NULL; unsigned long __user *datap = (unsigned long __user *)data; int ret; @@ -384,17 +383,20 @@ long arch_ptrace(struct task_struct *child, long request, if (addr < sizeof(struct pt_regs)) tmp = get_stack_long(child, addr); - else if (addr >= (unsigned long) &dummy->fpu && - addr < (unsigned long) &dummy->u_fpvalid) { + else if (addr >= offsetof(struct user, fpu) && + addr < offsetof(struct user, u_fpvalid)) { if (!tsk_used_math(child)) { - if (addr == (unsigned long)&dummy->fpu.fpscr) + if (addr == offsetof(struct user, fpu.fpscr)) tmp = FPSCR_INIT; else tmp = 0; - } else + } else { + unsigned long index; + index = addr - offsetof(struct user, fpu); tmp = ((unsigned long *)child->thread.xstate) - [(addr - (long)&dummy->fpu) >> 2]; - } else if (addr == (unsigned long) &dummy->u_fpvalid) + [index >> 2]; + } + } else if (addr == offsetof(struct user, u_fpvalid)) tmp = !!tsk_used_math(child); else if (addr == PT_TEXT_ADDR) tmp = child->mm->start_code; @@ -418,13 +420,15 @@ long arch_ptrace(struct task_struct *child, long request, if (addr < sizeof(struct pt_regs)) ret = put_stack_long(child, addr, data); - else if (addr >= (unsigned long) &dummy->fpu && - addr < (unsigned long) &dummy->u_fpvalid) { + else if (addr >= offsetof(struct user, fpu) && + addr < offsetof(struct user, u_fpvalid)) { + unsigned long index; + index = addr - offsetof(struct user, fpu); set_stopped_child_used_math(child); ((unsigned long *)child->thread.xstate) - [(addr - (long)&dummy->fpu) >> 2] = data; + [index >> 2] = data; ret = 0; - } else if (addr == (unsigned long) &dummy->u_fpvalid) { + } else if (addr == offsetof(struct user, u_fpvalid)) { conditional_stopped_child_used_math(data, child); ret = 0; } @@ -434,35 +438,35 @@ long arch_ptrace(struct task_struct *child, long request, return copy_regset_to_user(child, &user_sh_native_view, REGSET_GENERAL, 0, sizeof(struct pt_regs), - (void __user *)data); + datap); case PTRACE_SETREGS: return copy_regset_from_user(child, &user_sh_native_view, REGSET_GENERAL, 0, sizeof(struct pt_regs), - (const void __user *)data); + datap); #ifdef CONFIG_SH_FPU case PTRACE_GETFPREGS: return copy_regset_to_user(child, &user_sh_native_view, REGSET_FPU, 0, sizeof(struct user_fpu_struct), - (void __user *)data); + datap); case PTRACE_SETFPREGS: return copy_regset_from_user(child, &user_sh_native_view, REGSET_FPU, 0, sizeof(struct user_fpu_struct), - (const void __user *)data); + datap); #endif #ifdef CONFIG_SH_DSP case PTRACE_GETDSPREGS: return copy_regset_to_user(child, &user_sh_native_view, REGSET_DSP, 0, sizeof(struct pt_dspregs), - (void __user *)data); + datap); case PTRACE_SETDSPREGS: return copy_regset_from_user(child, &user_sh_native_view, REGSET_DSP, 0, sizeof(struct pt_dspregs), - (const void __user *)data); + datap); #endif default: ret = ptrace_request(child, request, addr, data); diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c index 4840716c196a..4436eacddb15 100644 --- a/arch/sh/kernel/ptrace_64.c +++ b/arch/sh/kernel/ptrace_64.c @@ -387,6 +387,7 @@ long arch_ptrace(struct task_struct *child, long request, unsigned long addr, unsigned long data) { int ret; + unsigned long __user *datap = (unsigned long __user *) data; switch (request) { /* read the word at location addr in the USER area. */ @@ -401,13 +402,15 @@ long arch_ptrace(struct task_struct *child, long request, tmp = get_stack_long(child, addr); else if ((addr >= offsetof(struct user, fpu)) && (addr < offsetof(struct user, u_fpvalid))) { - tmp = get_fpu_long(child, addr - offsetof(struct user, fpu)); + unsigned long index; + index = addr - offsetof(struct user, fpu); + tmp = get_fpu_long(child, index); } else if (addr == offsetof(struct user, u_fpvalid)) { tmp = !!tsk_used_math(child); } else { break; } - ret = put_user(tmp, (unsigned long *)data); + ret = put_user(tmp, datap); break; } @@ -438,7 +441,9 @@ long arch_ptrace(struct task_struct *child, long request, } else if ((addr >= offsetof(struct user, fpu)) && (addr < offsetof(struct user, u_fpvalid))) { - ret = put_fpu_long(child, addr - offsetof(struct user, fpu), data); + unsigned long index; + index = addr - offsetof(struct user, fpu); + ret = put_fpu_long(child, index, data); } break; @@ -446,23 +451,23 @@ long arch_ptrace(struct task_struct *child, long request, return copy_regset_to_user(child, &user_sh64_native_view, REGSET_GENERAL, 0, sizeof(struct pt_regs), - (void __user *)data); + datap); case PTRACE_SETREGS: return copy_regset_from_user(child, &user_sh64_native_view, REGSET_GENERAL, 0, sizeof(struct pt_regs), - (const void __user *)data); + datap); #ifdef CONFIG_SH_FPU case PTRACE_GETFPREGS: return copy_regset_to_user(child, &user_sh64_native_view, REGSET_FPU, 0, sizeof(struct user_fpu_struct), - (void __user *)data); + datap); case PTRACE_SETFPREGS: return copy_regset_from_user(child, &user_sh64_native_view, REGSET_FPU, 0, sizeof(struct user_fpu_struct), - (const void __user *)data); + datap); #endif default: ret = ptrace_request(child, request, addr, data);