[SPARC64]: Fix atomicity of TIF update in flush_thread()

[linux-2.6-omap-h63xx.git] / arch / sparc64 / kernel / process.c

diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 7d75cd4eb297bb08e016455fdfae71c89385e81e..b291060c25a642daf5d369a9a77cb594abf0903f 100644 (file)
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -413,8 +413,13 @@ void flush_thread(void)
        struct thread_info *t = current_thread_info();
        struct mm_struct *mm;
 
-       if (t->flags & _TIF_ABI_PENDING)
-               t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT);
+       if (test_ti_thread_flag(t, TIF_ABI_PENDING)) {
+               clear_ti_thread_flag(t, TIF_ABI_PENDING);
+               if (test_ti_thread_flag(t, TIF_32BIT))
+                       clear_ti_thread_flag(t, TIF_32BIT);
+               else
+                       set_ti_thread_flag(t, TIF_32BIT);
+       }
 
        mm = t->task->mm;
        if (mm)