linux-kernel - Got FPU related warning on Intel Quark during boot

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Message-ID: <CAHp75Vcugjp0UmmQKP3eEdhCEtranDVZMP4kHynaU__SCkmooA@mail.gmail.com>
Date:	Thu, 10 Mar 2016 12:46:53 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Ingo Molnar <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>
Subject: Got FPU related warning on Intel Quark during boot

Today tried first time after long break to boot Intel Quark SoC with
most recent linux-next. Got the following warning:

[   14.714533] WARNING: CPU: 0 PID: 823 at
arch/x86/include/asm/fpu/internal.h:163 fpu__clear+0x8c/0x160
[   14.726603] Modules linked in:
[   14.729910] CPU: 0 PID: 823 Comm: kworker/u2:0 Not tainted
4.5.0-rc7-next-20160310+ #137
[   14.738307]  00000000 00000000 ce691e20 c12b6fc9 ce691e50 c1049fd1
c1978c6c 00000000
[   14.747000]  00000337 c196b530 000000a3 c102050c 000000a3 ce587ac0
00000000 ce653000
[   14.755722]  ce691e64 c104a095 00000009 00000000 00000000 ce691e74
c102050c ce587500
[   14.764468] Call Trace:
[   14.767172]  [<c12b6fc9>] dump_stack+0x16/0x1d
[   14.771889]  [<c1049fd1>] __warn+0xd1/0xf0
[   14.776253]  [<c102050c>] ? fpu__clear+0x8c/0x160
[   14.781234]  [<c104a095>] warn_slowpath_null+0x25/0x30
[   14.786648]  [<c102050c>] fpu__clear+0x8c/0x160
[   14.791447]  [<c101f347>] flush_thread+0x57/0x60
[   14.796341]  [<c113a5cc>] flush_old_exec+0x4cc/0x600
[   14.801594]  [<c117ab20>] load_elf_binary+0x2b0/0x1060
[   14.807010]  [<c1111220>] ? get_user_pages_remote+0x50/0x60
[   14.812898]  [<c12c4687>] ? _copy_from_user+0x37/0x40
[   14.818236]  [<c1139f82>] search_binary_handler+0x62/0x150
[   14.824007]  [<c113b19c>] do_execveat_common+0x45c/0x600
[   14.829647]  [<c113b35f>] do_execve+0x1f/0x30
[   14.834289]  [<c1059941>] call_usermodehelper_exec_async+0x91/0xe0
[   14.840765]  [<c17f2310>] ret_from_kernel_thread+0x20/0x40
[   14.846540]  [<c10598b0>] ? umh_complete+0x40/0x40
[   14.851626] ---[ end trace 137ff5893f9b85bf ]---

Is it know issue? Or what could I try to fix it?

Reproducibility:  3 of 3.

-- 
With Best Regards,
Andy Shevchenko