From: Lai Jiangshan Date: Sun, 19 Apr 2020 14:40:47 +0000 (+0000) Subject: x86/entry/64: Remove unneeded kernel CR3 switching X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c75890700455;p=linux.git 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 Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/20200419144049.1906-2-laijs@linux.alibaba.com --- diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 609c71e3dba1f..87ffa792bc99e 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -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: