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Date: Sat, 1 Feb 2014 17:35:13 -0800 From: Suresh Siddha <sbsiddha@...il.com> To: "H. Peter Anvin" <hpa@...or.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Nate Eldredge <nate@...tsmathematics.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>, "the arch/x86 maintainers" <x86@...nel.org>, stable <stable@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Maarten Baert <maarten-baert@...mail.com>, Jan Kara <jack@...e.cz>, George Spelvin <linux@...izon.com>, Pekka Riikonen <priikone@....fi> Subject: Re: [PATCH] Make math_state_restore() save and restore the interrupt flag On Sat, Feb 1, 2014 at 5:26 PM, H. Peter Anvin <hpa@...or.com> wrote: > Even "b" does that, no? oh right. It needs an else. only for non-eager fpu case we should do stts() void __kernel_fpu_end(void) { if (use_eager_fpu()) { struct task_struct *me = current; if (tsk_used_math(me) && likely(!restore_fpu_checking( me))) return; } else stts(); } thanks, suresh > "a" should be fine as long as we don't ever use > those features in the kernel, even under kernel_fpu_begin/end(). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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