Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index a189a2b9293..cfaa373a6e7 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -23,10 +23,11 @@
 #include "mem_user.h"
 #include "tlb.h"
 #include "mode.h"
+#include "mode_kern.h"
 #include "init.h"
 #include "tt.h"
 
-void *switch_to_tt(void *prev, void *next, void *last)
+void switch_to_tt(void *prev, void *next)
 {
 	struct task_struct *from, *to, *prev_sched;
 	unsigned long flags;
@@ -36,8 +37,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
 	from = prev;
 	to = next;
 
-	to->thread.prev_sched = from;
-
 	cpu = from->thread_info->cpu;
 	if(cpu == 0)
 		forward_interrupts(to->thread.mode.tt.extern_pid);
@@ -53,7 +52,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
 	forward_pending_sigio(to->thread.mode.tt.extern_pid);
 
 	c = 0;
-	set_current(to);
 
 	err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c));
 	if(err != sizeof(c))
@@ -85,8 +83,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
 
 	flush_tlb_all();
 	local_irq_restore(flags);
-
-	return(current->thread.prev_sched);
 }
 
 void release_thread_tt(struct task_struct *task)