From d896fa20a70c9e596438728561e058a74ed3196b Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 13 Sep 2016 14:29:23 -0700 Subject: [PATCH] um/Stop conflating task_struct::stack with thread_info thread_info may move in the future, so use the accessors. [ Andy Lutomirski wrote this changelog message and changed "task_thread_info(child)->cpu" to "task_cpu(child)". ] Signed-off-by: Linus Torvalds Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jann Horn Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/3439705d9838940cc82733a7335fa8c654c37db8.1473801993.git.luto@kernel.org Signed-off-by: Ingo Molnar --- arch/x86/um/ptrace_32.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/um/ptrace_32.c b/arch/x86/um/ptrace_32.c index a7ef7b131e25..5766ead6fdb9 100644 --- a/arch/x86/um/ptrace_32.c +++ b/arch/x86/um/ptrace_32.c @@ -194,7 +194,7 @@ int peek_user(struct task_struct *child, long addr, long data) static int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) { - int err, n, cpu = ((struct thread_info *) child->stack)->cpu; + int err, n, cpu = task_cpu(child); struct user_i387_struct fpregs; err = save_i387_registers(userspace_pid[cpu], @@ -211,7 +211,7 @@ static int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *c static int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) { - int n, cpu = ((struct thread_info *) child->stack)->cpu; + int n, cpu = task_cpu(child); struct user_i387_struct fpregs; n = copy_from_user(&fpregs, buf, sizeof(fpregs)); @@ -224,7 +224,7 @@ static int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *c static int get_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child) { - int err, n, cpu = ((struct thread_info *) child->stack)->cpu; + int err, n, cpu = task_cpu(child); struct user_fxsr_struct fpregs; err = save_fpx_registers(userspace_pid[cpu], (unsigned long *) &fpregs); @@ -240,7 +240,7 @@ static int get_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct * static int set_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child) { - int n, cpu = ((struct thread_info *) child->stack)->cpu; + int n, cpu = task_cpu(child); struct user_fxsr_struct fpregs; n = copy_from_user(&fpregs, buf, sizeof(fpregs)); -- 2.20.1