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    Subject[RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message
    Date
    That message isn't at all clear -- what does "Legacy x87" even
    mean?

    Clarify it. If there's no FPU, say "x86/fpu: No FPU detected". If
    there's an FPU that doesn't have XSAVE, say "x86/fpu: Pre-XSAVE x87
    FPU detected".

    Signed-off-by: Andy Lutomirski <luto@kernel.org>
    ---
    arch/x86/kernel/fpu/xstate.c | 7 ++++++-
    1 file changed, 6 insertions(+), 1 deletion(-)

    diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
    index 1d7770447b3e..2d592b1c75e4 100644
    --- a/arch/x86/kernel/fpu/xstate.c
    +++ b/arch/x86/kernel/fpu/xstate.c
    @@ -705,8 +705,13 @@ void __init fpu__init_system_xstate(void)
    WARN_ON_FPU(!on_boot_cpu);
    on_boot_cpu = 0;

    + if (!boot_cpu_has(X86_FEATURE_FPU)) {
    + pr_info("x86/fpu: No FPU detected.\n");
    + return;
    + }
    +
    if (!boot_cpu_has(X86_FEATURE_XSAVE)) {
    - pr_info("x86/fpu: Legacy x87 FPU detected.\n");
    + pr_info("x86/fpu: Pre-XSAVE x87 FPU detected.\n");
    return;
    }

    --
    2.9.3
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