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c6x: add ret_from_kernel_thread(), simplify kernel_thread()

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Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Mark Salter
2012-09-21 12:26:37 -04:00
committed by Al Viro
parent 61b7fbc3f4
commit 46f15067c0
2 changed files with 32 additions and 26 deletions
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20
arch/c6x/kernel/entry.S
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@@ -400,6 +400,26 @@ ret_from_fork_2:
STW .D2T2 B0,*+SP(REGS_A4+8)
ENDPROC(ret_from_fork)
ENTRY(ret_from_kernel_thread)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule_tail,A0
MVKH .S1 schedule_tail,A0
B .S2X A0
#else
B .S2 schedule_tail
#endif
LDW .D2T2 *+SP(REGS_A0+8),B10 /* get fn */
ADDKPC .S2 0f,B3,3
0:
B .S2 B10 /* call fn */
LDW .D2T1 *+SP(REGS_A1+8),A4 /* get arg */
MVKL .S2 sys_exit,B11
MVKH .S2 sys_exit,B11
ADDKPC .S2 0f,B3,1
0:
BNOP .S2 B11,5 /* jump to sys_exit */
ENDPROC(ret_from_kernel_thread)
;;
;; These are the interrupt handlers, responsible for calling __do_IRQ()
;; int6 is used for syscalls (see _system_call entry)