Linus Torvalds 950b07c14e Revert "x86/apic: Include the LDR when clearing out APIC registers" ... This reverts commit 558682b529. Chris Wilson reports that it breaks his CPU hotplug test scripts. In particular, it breaks offlining and then re-onlining the boot CPU, which we treat specially (and the BIOS does too). The symptoms are that we can offline the CPU, but it then does not come back online again: smpboot: CPU 0 is now offline smpboot: Booting Node 0 Processor 0 APIC 0x0 smpboot: do_boot_cpu failed(-1) to wakeup CPU#0 Thomas says he knows why it's broken (my personal suspicion: our magic handling of the "cpu0_logical_apicid" thing), but for 5.3 the right fix is to just revert it, since we've never touched the LDR bits before, and it's not worth the risk to do anything else at this stage. [ Hotpluging of the boot CPU is special anyway, and should be off by default. See the "BOOTPARAM_HOTPLUG_CPU0" config option and the cpu0_hotplug kernel parameter. In general you should not do it, and it has various known limitations (hibernate and suspend require the boot CPU, for example). But it should work, even if the boot CPU is special and needs careful treatment - Linus ] Link: https://lore.kernel.org/lkml/156785100521.13300.14461504732265570003@skylake-alporthouse-com/ Reported-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Bandan Das <bsd@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-09-07 14:25:54 -07:00
..
alpha
arc	Wimplicit-fallthrough patches for 5.3-rc7	2019-08-29 09:28:25 -07:00
arm	Three fixes for ARM this time around:	2019-08-30 11:58:02 -07:00
arm64	Second Round of Renesas ARM Based SoC Fixes for v5.3	2019-09-05 17:56:30 +02:00
c6x
csky
h8300
hexagon
ia64
m68k
microblaze
mips	Wimplicit-fallthrough patches for 5.3-rc6	2019-08-22 11:26:10 -07:00
nds32	nds32: Mark expected switch fall-throughs	2019-08-29 11:06:56 -05:00
nios2
openrisc
parisc	parisc: fix compilation errrors	2019-08-24 19:48:42 -07:00
powerpc	powerpc fixes for 5.3 #5	2019-09-06 08:54:45 -07:00
riscv	RISC-V: Fix FIXMAP area corruption on RV32 systems	2019-08-28 15:30:12 -07:00
s390	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2019-08-23 17:34:11 -07:00
sh	sh: kernel: hw_breakpoint: Fix missing break in switch statement	2019-08-11 16:15:16 -05:00
sparc
um	um: fix time travel mode	2019-08-23 00:39:53 +02:00
unicore32
x86	Revert "x86/apic: Include the LDR when clearing out APIC registers"	2019-09-07 14:25:54 -07:00
xtensa	xtensa: add missing isync to the cpu_reset TLB code	2019-08-12 15:05:48 -07:00
.gitignore
Kconfig