From 287ad220cd8b5a9d29f71c78f6e4051093f051fc Mon Sep 17 00:00:00 2001 From: Jonas Bonn Date: Sun, 14 Oct 2012 16:19:52 +0200 Subject: openrisc: pass correct arg to schedule_tail schedule_tail() requires that the 'prev' task be passed as an argument to it. This arg is set in _switch, just before 'returning' to one of the ret_* functions where schedule_tail is invoked. Signed-off-by: Jonas Bonn --- arch/openrisc/kernel/entry.S | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'arch/openrisc/kernel/entry.S') diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index ddfcaa828b0e..374e63e7c9f6 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -1044,8 +1044,13 @@ ENTRY(_switch) /* Unwind stack to pre-switch state */ l.addi r1,r1,(INT_FRAME_SIZE) - /* Return via the link-register back to where we 'came from', where that can be - * either schedule() or return_from_fork()... */ + /* Return via the link-register back to where we 'came from', where + * that may be either schedule(), ret_from_fork(), or + * ret_from_kernel_thread(). If we are returning to a new thread, + * we are expected to have set up the arg to schedule_tail already, + * hence we do so here unconditionally: + */ + l.lwz r3,TI_STACK(r3) /* Load 'prev' as schedule_tail arg */ l.jr r9 l.nop -- cgit v1.2.3