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authorAndy Lutomirski <[email protected]>2016-01-21 15:24:31 -0800
committerIngo Molnar <[email protected]>2016-03-09 13:54:40 +0100
commitf363938c70a04e6bc99023a5e0c44ef7879b903f (patch)
treefb17f54412ba7f992ac84f6308d7f711c0045cb1 /tools/perf/util/trace-event-scripting.c
parente2857b8f11a289ed2b61d18d0665e05c1053c446 (diff)
x86/fpu: Fix 'no387' regression
After fixing FPU option parsing, we now parse the 'no387' boot option too early: no387 clears X86_FEATURE_FPU before it's even probed, so the boot CPU promptly re-enables it. I suspect it gets even more confused on SMP. Fix the probing code to leave X86_FEATURE_FPU off if it's been disabled by setup_clear_cpu_cap(). Signed-off-by: Andy Lutomirski <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Quentin Casasnovas <[email protected]> Cc: Sai Praneeth Prakhya <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: yu-cheng yu <[email protected]> Fixes: 4f81cbafcce2 ("x86/fpu: Fix early FPU command-line parsing") Signed-off-by: Ingo Molnar <[email protected]>
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