From: "tip-bot2 for Lai Jiangshan" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Lai Jiangshan <laijs@linux.alibaba.com>,
Thomas Gleixner <tglx@linutronix.de>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/entry] x86/entry/64: Remove unneeded kernel CR3 switching
Date: Thu, 07 May 2020 15:16:53 -0000 [thread overview]
Message-ID: <158886461331.8414.12415962471907072377.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200419144049.1906-2-laijs@linux.alibaba.com>
The following commit has been merged into the x86/entry branch of tip:
Commit-ID: f642aebc9d2a51775d86eaa79da9d90aa5dff0f7
Gitweb: https://git.kernel.org/tip/f642aebc9d2a51775d86eaa79da9d90aa5dff0f7
Author: Lai Jiangshan <laijs@linux.alibaba.com>
AuthorDate: Sun, 19 Apr 2020 14:40:47
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Thu, 07 May 2020 17:12:39 +02:00
x86/entry/64: Remove unneeded kernel CR3 switching
When native_load_gs_index() fails on .Lgs_change, CR3 must be kernel
CR3. No need to switch it.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200419144049.1906-2-laijs@linux.alibaba.com
---
arch/x86/entry/entry_64.S | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 3d747da..7d40d10 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1338,7 +1338,6 @@ SYM_CODE_START_LOCAL(error_entry)
*/
SWAPGS
FENCE_SWAPGS_USER_ENTRY
- SWITCH_TO_KERNEL_CR3 scratch_reg=%rax
jmp .Lerror_entry_done
.Lbstep_iret:
next prev parent reply other threads:[~2020-05-07 15:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-19 14:40 [PATCH 0/3] x86: cleanups Lai Jiangshan
2020-04-19 14:40 ` [PATCH 1/3] x86/entry: remove unneeded kernel cr3 switching Lai Jiangshan
2020-05-07 15:16 ` tip-bot2 for Lai Jiangshan [this message]
2020-04-19 14:40 ` [PATCH 2/3] x86: remove address operator on function machine_check() Lai Jiangshan
2020-05-07 15:16 ` [tip: x86/entry] x86/idt: Remove " tip-bot2 for Lai Jiangshan
2020-04-19 14:40 ` [PATCH 3/3] x86/entry: remove an unused label Lai Jiangshan
2020-05-07 15:16 ` [tip: x86/entry] x86/entry/64: Remove " tip-bot2 for Lai Jiangshan
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