From: "tip-bot2 for Arvind Sankar" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Arvind Sankar <nivedita@alum.mit.edu>,
Borislav Petkov <bp@suse.de>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/boot] x86/boot/compressed/64: Use LEA to initialize boot stack pointer
Date: Wed, 12 Feb 2020 12:04:37 -0000 [thread overview]
Message-ID: <158150907763.411.16186019828079681497.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200107194436.2166846-2-nivedita@alum.mit.edu>
The following commit has been merged into the x86/boot branch of tip:
Commit-ID: 48bfdb9deffdc6b683feb25e15f4f26aac503501
Gitweb: https://git.kernel.org/tip/48bfdb9deffdc6b683feb25e15f4f26aac503501
Author: Arvind Sankar <nivedita@alum.mit.edu>
AuthorDate: Tue, 07 Jan 2020 14:44:35 -05:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Wed, 12 Feb 2020 11:11:06 +01:00
x86/boot/compressed/64: Use LEA to initialize boot stack pointer
It's shorter, and it's what is used in every other place, so make it
consistent.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200107194436.2166846-2-nivedita@alum.mit.edu
---
arch/x86/boot/compressed/head_64.S | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 1f1f6c8..d1220de 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -81,9 +81,7 @@ SYM_FUNC_START(startup_32)
subl $1b, %ebp
/* setup a stack and make sure cpu supports long mode. */
- movl $boot_stack_end, %eax
- addl %ebp, %eax
- movl %eax, %esp
+ leal boot_stack_end(%ebp), %esp
call verify_cpu
testl %eax, %eax
next prev parent reply other threads:[~2020-02-12 12:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 19:44 [PATCH 1/3] x86/boot/compressed/32: Simplify calculation of output address Arvind Sankar
2020-01-07 19:44 ` [PATCH 2/3] x86/boot/compressed/64: Use leal to initialize boot stack pointer Arvind Sankar
2020-02-12 12:04 ` tip-bot2 for Arvind Sankar [this message]
2020-01-07 19:44 ` [PATCH 3/3] x86/boot/compressed/64: Use 32-bit move for z_output_len Arvind Sankar
2020-02-11 16:17 ` Borislav Petkov
2020-02-11 17:33 ` [PATCH v2] x86/boot: Use 32-bit (zero-extended) " Arvind Sankar
2020-02-11 18:15 ` Borislav Petkov
2020-02-11 19:27 ` Arvind Sankar
2020-02-12 9:47 ` Borislav Petkov
2020-02-12 12:04 ` [tip: x86/boot] x86/boot/compressed/64: Use 32-bit (zero-extended) MOV " tip-bot2 for Arvind Sankar
2020-01-23 11:04 ` [tip: x86/asm] x86/boot: Simplify calculation of output address tip-bot2 for Arvind Sankar
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