Merge branch 'fbdev/udlfb'

[cascardo/linux.git] / arch / tile / kernel / process.c

diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 8430f45..e90eb53 100644 (file)
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -211,6 +211,13 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
        childregs->regs[0] = 0;         /* return value is zero */
        childregs->sp = sp;  /* override with new user stack pointer */
 
+       /*
+        * If CLONE_SETTLS is set, set "tp" in the new task to "r4",
+        * which is passed in as arg #5 to sys_clone().
+        */
+       if (clone_flags & CLONE_SETTLS)
+               childregs->tp = regs->regs[4];
+
        /*
         * Copy the callee-saved registers from the passed pt_regs struct
         * into the context-switch callee-saved registers area.
@@ -539,6 +546,7 @@ struct task_struct *__sched _switch_to(struct task_struct *prev,
        return __switch_to(prev, next, next_current_ksp0(next));
 }
 
+/* Note there is an implicit fifth argument if (clone_flags & CLONE_SETTLS). */
 SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
                void __user *, parent_tidptr, void __user *, child_tidptr,
                struct pt_regs *, regs)