bisected: [PATCH V4] x86/apic: Always explicitly disarm TSC-deadline timer

[Sergey Senozhatsky <senozhatsky@chromium.org>]

Hi folks,
sorry if messed something up, this email has never been in my inbox.

> Disable the TSC Deadline timer in lapic_timer_shutdown() by writing to
> MSR_IA32_TSC_DEADLINE when in TSC-deadline mode. Also avoid writing
> to the initial-count register (APIC_TMICT) which is ignored in
> TSC-deadline mode.

So this commit hit stable and we now see section mismatch errors:

// stripped

WARNING: vmlinux.o(__ex_table+0x447c): Section mismatch in reference from the (unknown reference) (unknown) to the (unknown reference) .irqentry.text:(unknown)
The relocation at __ex_table+0x447c references
section ".irqentry.text" which is not in the list of
authorized sections.

WARNING: vmlinux.o(__ex_table+0x4480): Section mismatch in reference from the (unknown reference) (unknown) to the (unknown reference) .irqentry.text:(unknown)
The relocation at __ex_table+0x4480 references
section ".irqentry.text" which is not in the list of
authorized sections.

FATAL: modpost: Section mismatches detected.


Specifically because of wrmsrl.

I'm aware of the section mismatch errors on linux-5.4 (I know), not
aware of any other stable versions (but I haven't checked).  Is this
something specific to linux-5.4?