rhel7: kernel: WARNING: at kernel/smp.c:387 smp_call_function_many+0xad/0x2c0()

Issue

We receive this:

:WARNING: at kernel/smp.c:387 smp_call_function_many+0xad/0x2c0()
:Modules linked in: ext4 mbcache jbd2 sd_mod sr_mod crc_t10dif cdrom crct10dif_common mgag200 syscopyarea sysfillrect sysimgblt isci i2c_algo_bit drm_kms_helper ttm libsas ahci drm scsi_transport_sas libahci libata megaraid_sas i2c_core
:CPU: 2 PID: 238 Comm: plymouthd Not tainted 3.10.0-71.el7.x86_64 #1
:Hardware name: FUJITSU PRIMERGY TX150 S8/D3079-A1, BIOS V4.6.5.3 R1.11.0 for D3079-A1x 02/01/2013
: 0000000000000009 ffff880464881528 ffffffff815bd8c4 ffff880464881560
: ffffffff81059c61 0000000000000002 ffffffff819bce60 0000000000000000
: 0000000000000000 ffffffff819bce60 ffff880464881570 ffffffff81059d3a
:Call Trace:
: [<ffffffff815bd8c4>] dump_stack+0x19/0x1b
: [<ffffffff81059c61>] warn_slowpath_common+0x61/0x80
: [<ffffffff81059d3a>] warn_slowpath_null+0x1a/0x20
: [<ffffffff810bc7dd>] smp_call_function_many+0xad/0x2c0
: [<ffffffff8104d210>] ? flush_tlb_func+0xb0/0xb0
: [<ffffffff8104d210>] ? flush_tlb_func+0xb0/0xb0
: [<ffffffff810bca4d>] on_each_cpu+0x2d/0x60
: [<ffffffff8104d6aa>] flush_tlb_kernel_range+0x4a/0x70
: [<ffffffff8116b2ac>] __purge_vmap_area_lazy+0x16c/0x1d0
: [<ffffffff8116b4fe>] free_vmap_area_noflush+0x5e/0x60
: [<ffffffff8116cdae>] remove_vm_area+0x5e/0x70
: [<ffffffff8116cdea>] __vunmap+0x2a/0x100
: [<ffffffff8116cfb6>] vunmap+0x36/0x40
: [<ffffffffa00f9efa>] ttm_bo_kunmap+0x9a/0xd0 [ttm]
: [<ffffffffa0154508>] mga_dirty_update+0x2c8/0x2f0 [mgag200]
: [<ffffffffa015455f>] mga_imageblit+0x2f/0x40 [mgag200]
: [<ffffffff812fcf8f>] bit_putcs+0x2ef/0x550
: [<ffffffffa01543e0>] ? mga_dirty_update+0x1a0/0x2f0 [mgag200]
: [<ffffffffa015455f>] ? mga_imageblit+0x2f/0x40 [mgag200]
: [<ffffffff812f6db1>] ? get_color.isra.15+0x31/0x140
: [<ffffffff812f7e08>] fbcon_putcs+0x128/0x160
: [<ffffffff812fcca0>] ? bit_cursor+0x660/0x660
: [<ffffffff812f8137>] fbcon_redraw.isra.24+0x197/0x200
: [<ffffffff812f958b>] fbcon_scroll+0x1eb/0xd30
: [<ffffffff81364d5c>] scrup+0xfc/0x110
: [<ffffffff81364df0>] lf+0x80/0x90
: [<ffffffff81365f9a>] vt_console_print+0x2aa/0x3f0
: [<ffffffff8105adc1>] call_console_drivers.constprop.15+0x91/0xf0
: [<ffffffff8105bf2f>] console_unlock+0x3bf/0x400
: [<ffffffff8105c226>] vprintk_emit+0x2b6/0x530
: [<ffffffff815b7838>] printk+0x67/0x69
: [<ffffffffa0150d39>] mga_crtc_do_set_base.isra.17.constprop.19+0x209/0x2f0 [mgag200]
: [<ffffffffa0152f61>] mga_crtc_mode_set_base+0x11/0x20 [mgag200]
: [<ffffffffa00bc6e8>] drm_crtc_helper_set_config+0x918/0xb20 [drm_kms_helper]
: [<ffffffffa007621d>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
: [<ffffffffa0078c97>] drm_mode_setcrtc+0xf7/0x650 [drm]
: [<ffffffffa014f15c>] ? mgag200_user_framebuffer_create+0x5c/0x150 [mgag200]
: [<ffffffff81161f7e>] ? vma_gap_callbacks_rotate+0x1e/0x30
: [<ffffffffa0069ca2>] drm_ioctl+0x502/0x630 [drm]
: [<ffffffff811b2965>] do_vfs_ioctl+0x2e5/0x4d0
: [<ffffffff8124280e>] ? file_has_perm+0x8e/0xa0
: [<ffffffff811b2bd1>] SyS_ioctl+0x81/0xa0
: [<ffffffff815cd719>] system_call_fastpath+0x16/0x1b