x86/entry/32: Remove GET_THREAD_INFO() from entry code

The entry code used to cache the thread_info pointer in the EBP register,
but all the code that used it has been moved to C.  Remove the unused
code to get the pointer.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1462416278-11974-3-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/entry/entry_32.S

@@ -207,7 +207,6 @@
 ENTRY(ret_from_fork)
 	pushl	%eax
 	call	schedule_tail
-	GET_THREAD_INFO(%ebp)
 	popl	%eax
 
 	/* When we fork, we trace the syscall return in the child, too. */
@@ -219,7 +218,6 @@ END(ret_from_fork)
 ENTRY(ret_from_kernel_thread)
 	pushl	%eax
 	call	schedule_tail
-	GET_THREAD_INFO(%ebp)
 	popl	%eax
 	movl	PT_EBP(%esp), %eax
 	call	*PT_EBX(%esp)
@@ -247,7 +245,6 @@ ENDPROC(ret_from_kernel_thread)
 ret_from_exception:
 	preempt_stop(CLBR_ANY)
 ret_from_intr:
-	GET_THREAD_INFO(%ebp)
 #ifdef CONFIG_VM86
 	movl	PT_EFLAGS(%esp), %eax		# mix EFLAGS and CS
 	movb	PT_CS(%esp), %al