alpha: switch to generic kernel_thread()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 61ff145..421dccf 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -609,59 +609,22 @@
.end ret_from_fork
/*
- * kernel_thread(fn, arg, clone_flags)
+ * ... and new kernel threads - here
*/
.align 4
- .globl kernel_thread
- .ent kernel_thread
-kernel_thread:
- /* We can be called from a module. */
- ldgp $gp, 0($27)
- .prologue 1
- subq $sp, SP_OFF+6*8, $sp
- br $1, 2f /* load start address */
-
- /* We've now "returned" from a fake system call. */
- unop
- blt $0, 1f /* error? */
- ldi $1, 0x3fff
- beq $20, 1f /* parent or child? */
-
- bic $sp, $1, $8 /* in child. */
- jsr $26, ($27)
+ .globl ret_from_kernel_thread
+ .ent ret_from_kernel_thread
+ret_from_kernel_thread:
+ mov $17, $16
+ jsr $26, schedule_tail
+ mov $9, $27
+ mov $10, $16
+ jsr $26, ($9)
ldgp $gp, 0($26)
mov $0, $16
mov $31, $26
jmp $31, sys_exit
-
-1: ret /* in parent. */
-
- .align 4
-2: /* Fake a system call stack frame, as we can't do system calls
- from kernel space. Note that we store FN and ARG as they
- need to be set up in the child for the call. Also store $8
- and $26 for use in the parent. */
- stq $31, SP_OFF($sp) /* ps */
- stq $1, SP_OFF+8($sp) /* pc */
- stq $gp, SP_OFF+16($sp) /* gp */
- stq $16, 136($sp) /* $27; FN for child */
- stq $17, SP_OFF+24($sp) /* $16; ARG for child */
- stq $8, 64($sp) /* $8 */
- stq $26, 128($sp) /* $26 */
- /* Avoid the HAE being gratuitously wrong, to avoid restoring it. */
- ldq $2, alpha_mv+HAE_CACHE
- stq $2, 152($sp) /* HAE */
-
- /* Shuffle FLAGS to the front; add CLONE_VM. */
- ldi $1, CLONE_VM|CLONE_UNTRACED
- or $18, $1, $16
- bsr $26, sys_clone
-
- /* We don't actually care for a3 success widgetry in the kernel.
- Not for positive errno values. */
- stq $0, 0($sp) /* $0 */
- br ret_to_kernel
-.end kernel_thread
+.end ret_from_kernel_thread
/*