X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=arch%2Fx86%2Fentry%2Fentry_32.S;h=57f7ec35216ef5e2a78efa0d303f8f343b010d68;hb=6c24337f22115d669e24ce990842dab667371b4d;hp=701d29f8e4d300ac01553e5d8317a5e40dbdcc6d;hpb=ad3efdb72cd921ec52ac94e82595a5d2e7a7b054;p=karo-tx-linux.git

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 701d29f8e4d3..57f7ec35216e 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -254,23 +254,6 @@ ENTRY(__switch_to_asm)
 	jmp	__switch_to
 END(__switch_to_asm)
 
-/*
- * The unwinder expects the last frame on the stack to always be at the same
- * offset from the end of the page, which allows it to validate the stack.
- * Calling schedule_tail() directly would break that convention because its an
- * asmlinkage function so its argument has to be pushed on the stack.  This
- * wrapper creates a proper "end of stack" frame header before the call.
- */
-ENTRY(schedule_tail_wrapper)
-	FRAME_BEGIN
-
-	pushl	%eax
-	call	schedule_tail
-	popl	%eax
-
-	FRAME_END
-	ret
-ENDPROC(schedule_tail_wrapper)
 /*
  * A newly forked process directly context switches into this address.
  *
@@ -279,15 +262,24 @@ ENDPROC(schedule_tail_wrapper)
  * edi: kernel thread arg
  */
 ENTRY(ret_from_fork)
-	call	schedule_tail_wrapper
+	FRAME_BEGIN		/* help unwinder find end of stack */
+
+	/*
+	 * schedule_tail() is asmlinkage so we have to put its 'prev' argument
+	 * on the stack.
+	 */
+	pushl	%eax
+	call	schedule_tail
+	popl	%eax
 
 	testl	%ebx, %ebx
 	jnz	1f		/* kernel threads are uncommon */
 
 2:
 	/* When we fork, we trace the syscall return in the child, too. */
-	movl    %esp, %eax
+	leal	FRAME_OFFSET(%esp), %eax
 	call    syscall_return_slowpath
+	FRAME_END
 	jmp     restore_all
 
 	/* kernel thread */