x86/smpboot: Remove initial_gs

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Given its CPU#, each CPU can find its own per-cpu offset, and directly set
GSBASE accordingly. The global variable can be eliminated.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Usama Arif <usama.arif@bytedance.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Usama Arif <usama.arif@bytedance.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lore.kernel.org/r/20230316222109.1940300-9-usama.arif@bytedance.com

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Brian Gerst 2023-03-16 22:21:05 +00:00 • committed by Thomas Gleixner

parent c253b64020

commit 8f6be6d870

4 changed files with 8 additions and 18 deletions

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1

arch/x86/include/asm/realmode.h

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arch/x86/kernel/acpi/sleep.c

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22

arch/x86/kernel/head_64.S

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arch/x86/kernel/smpboot.c

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