MIPS: Avoid clobbering struct pt_regs in kthreads

[firefly-linux-kernel-4.4.55.git] / arch / mips / kernel / process.c

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index c09d681b7181dbc15851cc9f425ae98ba6e3c561..f3d73e1831c1567ccb674429eb83492feb2942e1 100644 (file)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -115,7 +115,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 {
        struct thread_info *ti = task_thread_info(p);
        struct pt_regs *childregs;
-       long childksp;
+       unsigned long childksp;
        p->set_child_tid = p->clear_child_tid = NULL;
 
        childksp = (unsigned long)task_stack_page(p) + THREAD_SIZE - 32;
@@ -132,6 +132,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 
        /* set up new TSS. */
        childregs = (struct pt_regs *) childksp - 1;
+       /*  Put the stack after the struct pt_regs.  */
+       childksp = (unsigned long) childregs;
        *childregs = *regs;
        childregs->regs[7] = 0; /* Clear error flag */