diff mbox series

[4.19,33/92] MIPS: CPU#0 is not hotpluggable

Message ID	20200820091539.317589293@linuxfoundation.org
State	New
Headers	show Return-Path: <SRS0=nT5k=B6=vger.kernel.org=stable-owner@kernel.org> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Huacai Chen <chenhc@lemote.com>, Thomas Bogendoerfer <tsbogend@alpha.franken.de> Subject: [PATCH 4.19 33/92] MIPS: CPU#0 is not hotpluggable Date: Thu, 20 Aug 2020 11:21:18 +0200 Message-Id: <20200820091539.317589293@linuxfoundation.org> In-Reply-To: <20200820091537.490965042@linuxfoundation.org> References: <20200820091537.490965042@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk
Series	None \| expand [4.19,03/92] PCI: hotplug: ACPI: Fix context refcounting in acpiphp_grab_context() [4.19,04/92] PCI: Mark AMD Navi10 GPU rev 0x00 ATS as broken [4.19,08/92] PCI: Probe bridge window attributes once at enumeration-time [4.19,09/92] btrfs: free anon block device right after subvolume deletion [4.19,11/92] btrfs: ref-verify: fix memory leak in add_block_entry [4.19,13/92] btrfs: open device without device_list_mutex [4.19,16/92] btrfs: fix memory leaks after failure to lookup checksums during inode logging [4.19,19/92] iio: dac: ad5592r: fix unbalanced mutex unlocks in ad5592r_read_raw() [4.19,20/92] xtensa: fix xtensa_pmu_setup prototype [4.19,23/92] powerpc: Fix circular dependency between percpu.h and mmu.h [4.19,24/92] media: vsp1: dl: Fix NULL pointer dereference on unbind [4.19,25/92] net: ethernet: stmmac: Disable hardware multicast filter [4.19,27/92] net/compat: Add missing sock updates for SCM_RIGHTS [4.19,32/92] driver core: Avoid binding drivers to dead devices [4.19,33/92] MIPS: CPU#0 is not hotpluggable [4.19,35/92] ocfs2: change slot number type s16 to u16 [4.19,36/92] mm/page_counter.c: fix protection usage propagation [4.19,38/92] kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler [4.19,40/92] tracing: Use trace_sched_process_free() instead of exit() for pid tracing [4.19,42/92] watchdog: f71808e_wdt: remove use of wrong watchdog_info option [4.19,44/92] pseries: Fix 64 bit logical memory block panic [4.19,46/92] perf intel-pt: Fix FUP packet state [4.19,47/92] remoteproc: qcom: q6v5: Update running state before requesting stop [4.19,48/92] drm/imx: imx-ldb: Disable both channels for split mode in enc->disable() [4.19,49/92] mfd: arizona: Ensure 32k clock is put on driver unbind and error [4.19,51/92] RDMA/ipoib: Fix ABBA deadlock with ipoib_reap_ah() [4.19,56/92] USB: serial: ftdi_sio: fix break and sysrq handling [4.19,57/92] mmc: renesas_sdhi_internal_dmac: clean up the code for dma complete [4.19,59/92] dm rq: dont call blk_mq_queue_stopped() in dm_stop_queue() [4.19,60/92] selftests/powerpc: ptrace-pkey: Rename variables to make it easier to follow code [4.19,62/92] selftests/powerpc: ptrace-pkey: Dont update expected UAMOR value [4.19,65/92] i2c: rcar: slave: only send STOP event when we have been addressed [4.19,69/92] i2c: rcar: avoid race when unregistering slave [4.19,71/92] scsi: lpfc: nvmet: Avoid hang / use-after-free again when destroying targetport [4.19,73/92] Input: sentelic - fix error return when fsp_reg_write fails [4.19,77/92] nfs: Fix getxattr kernel panic and memory overflow [4.19,80/92] fs/minix: remove expected error message in block_to_path() [4.19,82/92] test_kmod: avoid potential double free in trigger_config_run_type() [4.19,84/92] ALSA: echoaudio: Fix potential Oops in snd_echo_resume() [4.19,86/92] tools build feature: Quote CC and CXX for their arguments [4.19,88/92] khugepaged: retract_page_tables() remember to test exit [4.19,89/92] arm64: dts: marvell: espressobin: add ethernet alias [4.19,90/92] drm/radeon: fix fb_div check in ni_init_smc_spll_table() [4.19,92/92] drm/amdgpu: Fix bug where DPM is not enabled after hibernate and resume

Commit Message

Greg KH Aug. 20, 2020, 9:21 a.m. UTC

From: Huacai Chen <chenhc@lemote.com>

commit 9cce844abf07b683cff5f0273977d5f8d0af94c7 upstream.

Now CPU#0 is not hotpluggable on MIPS, so prevent to create /sys/devices
/system/cpu/cpu0/online which confuses some user-space tools.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/kernel/topology.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff mbox series

Patch

--- a/arch/mips/kernel/topology.c
+++ b/arch/mips/kernel/topology.c
@@ -20,7 +20,7 @@  static int __init topology_init(void)
 	for_each_present_cpu(i) {
 		struct cpu *c = &per_cpu(cpu_devices, i);
 
-		c->hotpluggable = 1;
+		c->hotpluggable = !!i;
 		ret = register_cpu(c, i);
 		if (ret)
 			printk(KERN_WARNING "topology_init: register_cpu %d "