arm: switch to saner kernel_execve() semantics
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index ed79412..9106966 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -86,35 +86,14 @@
*/
ENTRY(ret_from_fork)
bl schedule_tail
+ cmp r5, #0
+ movne r0, r4
+ movne lr, pc
+ movne pc, r5
get_thread_info tsk
- mov why, #1
b ret_slow_syscall
ENDPROC(ret_from_fork)
-ENTRY(ret_from_kernel_thread)
- UNWIND(.fnstart)
- UNWIND(.cantunwind)
- bl schedule_tail
- mov r0, r4
- adr lr, BSYM(1f) @ kernel threads should not exit
- mov pc, r5
-1: bl do_exit
- nop
- UNWIND(.fnend)
-ENDPROC(ret_from_kernel_thread)
-
-/*
- * turn a kernel thread into userland process
- * use: ret_from_kernel_execve(struct pt_regs *normal)
- */
-ENTRY(ret_from_kernel_execve)
- mov why, #0 @ not a syscall
- str why, [r0, #S_R0] @ ... and we want 0 in ->ARM_r0 as well
- get_thread_info tsk @ thread structure
- mov sp, r0 @ stack pointer just under pt_regs
- b ret_slow_syscall
-ENDPROC(ret_from_kernel_execve)
-
.equ NR_syscalls,0
#define CALL(x) .equ NR_syscalls,NR_syscalls+1
#include "calls.S"