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-rw-r--r--arch/um/kernel/process.c12
-rw-r--r--arch/um/kernel/ptrace.c2
-rw-r--r--arch/um/kernel/signal.c12
-rw-r--r--arch/um/kernel/skas/uaccess.c4
-rw-r--r--arch/um/kernel/um_arch.c4
5 files changed, 7 insertions, 27 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 6daffb9d8a..ab95648e93 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -332,17 +332,9 @@ int __init make_proc_sysemu(void)
late_initcall(make_proc_sysemu);
-int singlestepping(void * t)
+int singlestepping(void)
{
- struct task_struct *task = t ? t : current;
-
- if (!test_thread_flag(TIF_SINGLESTEP))
- return 0;
-
- if (task->thread.singlestep_syscall)
- return 1;
-
- return 2;
+ return test_thread_flag(TIF_SINGLESTEP);
}
/*
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 5154b27de5..6600a27827 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -12,7 +12,6 @@
void user_enable_single_step(struct task_struct *child)
{
set_tsk_thread_flag(child, TIF_SINGLESTEP);
- child->thread.singlestep_syscall = 0;
#ifdef SUBARCH_SET_SINGLESTEPPING
SUBARCH_SET_SINGLESTEPPING(child, 1);
@@ -22,7 +21,6 @@ void user_enable_single_step(struct task_struct *child)
void user_disable_single_step(struct task_struct *child)
{
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
- child->thread.singlestep_syscall = 0;
#ifdef SUBARCH_SET_SINGLESTEPPING
SUBARCH_SET_SINGLESTEPPING(child, 0);
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index ae4658f576..a56b445227 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -121,18 +121,6 @@ void do_signal(struct pt_regs *regs)
}
/*
- * This closes a way to execute a system call on the host. If
- * you set a breakpoint on a system call instruction and singlestep
- * from it, the tracing thread used to PTRACE_SINGLESTEP the process
- * rather than PTRACE_SYSCALL it, allowing the system call to execute
- * on the host. The tracing thread will check this flag and
- * PTRACE_SYSCALL if necessary.
- */
- if (test_thread_flag(TIF_SINGLESTEP))
- current->thread.singlestep_syscall =
- is_syscall(PT_REGS_IP(&current->thread.regs));
-
- /*
* if there's no signal to deliver, we just put the saved sigmask
* back
*/
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index aaee96f071..198269e384 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -236,7 +236,9 @@ EXPORT_SYMBOL(strnlen_user);
* argument and comparison of the previous
* futex value with another constant.
*
- * @encoded_op: encoded operation to execute
+ * @op: operation to execute
+ * @oparg: argument to operation
+ * @oval: old value at uaddr
* @uaddr: pointer to user space address
*
* Return:
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index b1bfed0c85..7a9820797e 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -373,10 +373,10 @@ int __init linux_main(int argc, char **argv)
max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC;
/*
- * Zones have to begin on a 1 << MAX_ORDER page boundary,
+ * Zones have to begin on a 1 << MAX_PAGE_ORDER page boundary,
* so this makes sure that's true for highmem
*/
- max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1);
+ max_physmem &= ~((1 << (PAGE_SHIFT + MAX_PAGE_ORDER)) - 1);
if (physmem_size + iomem_size > max_physmem) {
highmem = physmem_size + iomem_size - max_physmem;
physmem_size -= highmem;