ARC: Process-creation/scheduling/idle-loop
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 0b0a190..ed08ac1 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -566,8 +566,19 @@
; when the forked child comes here from the __switch_to function
; r0 has the last task pointer.
; put last task in scheduler queue
- bl @schedule_tail
- b @ret_from_exception
+ bl @schedule_tail
+
+ ; If kernel thread, jump to it's entry-point
+ ld r9, [sp, PT_status32]
+ brne r9, 0, 1f
+
+ jl.d [r14]
+ mov r0, r13 ; arg to payload
+
+1:
+ ; special case of kernel_thread entry point returning back due to
+ ; kernel_execve() - pretend return from syscall to ret to userland
+ b ret_from_exception
ARC_EXIT ret_from_fork
;################### Special Sys Call Wrappers ##########################