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From: Brian Gerst <brgerst@gmail.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Borislav Petkov <bp@suse.de>
Subject: [PATCH 2/3] x86-32: Remove GET_THREAD_INFO from entry code
Date: Wed,  4 May 2016 22:44:37 -0400	[thread overview]
Message-ID: <1462416278-11974-3-git-send-email-brgerst@gmail.com> (raw)
In-Reply-To: <1462416278-11974-1-git-send-email-brgerst@gmail.com>

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>
---
 arch/x86/entry/entry_32.S | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index c84d99b..983e5d3 100644
--- a/arch/x86/entry/entry_32.S
+++ b/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
-- 
2.5.5

  parent reply	other threads:[~2016-05-05  2:44 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-05  2:44 [PATCH 0/3] Misc x86 cleanups Brian Gerst
2016-05-05  2:44 ` [PATCH 1/3] x86: Don't save/restore EFLAGS on task switch Brian Gerst
2016-05-05  3:27   ` Andy Lutomirski
2016-05-05  9:36   ` [tip:x86/asm] x86/entry, sched/x86: " tip-bot for Brian Gerst
2016-05-05  2:44 ` Brian Gerst [this message]
2016-05-05  3:27   ` [PATCH 2/3] x86-32: Remove GET_THREAD_INFO from entry code Andy Lutomirski
2016-05-05  9:37   ` [tip:x86/asm] x86/entry/32: Remove GET_THREAD_INFO() " tip-bot for Brian Gerst
2016-05-05  2:44 ` [PATCH 3/3] x86-32: Remove asmlinkage_protect Brian Gerst
2016-05-05  3:29   ` Andy Lutomirski
2016-05-05  9:37   ` [tip:x86/asm] x86/entry/32: Remove asmlinkage_protect() tip-bot for Brian Gerst

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