Commit c7589070 authored Apr 19, 2020 by Lai Jiangshan Committed by Thomas Gleixner Jun 11, 2020

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

parent 26fa1263

arch/x86/entry/entry_64.S

+0 −1

Original line number	Diff line number	Diff line
		@@ -1334,7 +1334,6 @@ SYM_CODE_START_LOCAL(error_entry)
		*/
		SWAPGS
		FENCE_SWAPGS_USER_ENTRY
		SWITCH_TO_KERNEL_CR3 scratch_reg=%rax
		jmp .Lerror_entry_done

		.Lbstep_iret:

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