Messages in this thread | | | Date | Thu, 2 May 2019 17:40:43 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH] x86/fpu: Remove the _GPL from the kernel_fpu_begin/end() export |
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On 2019-05-02 07:42:14 [-0700], Andy Lutomirski wrote: > The FPU is not a super-Linuxy internal detail, so remove the _GPL > from its export. Without something like this patch, it's impossible > for even highly license-respecting non-GPL modules to use the FPU, > which seems silly to me. After all, the FPU is a CPU feature, not > really a kernel feature at all. > > Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> > Cc:: Borislav Petkov <bp@suse.de> > Cc: Rik van Riel <riel@surriel.com> > Cc: "H. Peter Anvin" <hpa@zytor.com> > Cc: "Jason A. Donenfeld" <Jason@zx2c4.com> > Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> > Cc: Dave Hansen <dave.hansen@linux.intel.com> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: Nicolai Stange <nstange@suse.de> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Radim Krčmář <rkrcmar@redhat.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: x86@kernel.org > Cc: stable@vger.kernel.org > Fixes: 12209993e98c ("x86/fpu: Don't export __kernel_fpu_{begin,end}()") > Signed-off-by: Andy Lutomirski <luto@kernel.org> > --- > > This fixes a genuine annoyance for ZFS on Linux. Regardless of what > one may think about the people who distribute ZFS on Linux > *binaries*, as far as I know, the source and the users who build it > themselves are entirely respectful of everyone's license. I have no > problem with EXPORT_SYMBOL_GPL() in general, but let's please avoid > using it for things that aren't fundamentally Linux internals.
Please don't start this. We have everything _GPL that is used for FPU related code and only a few functions are exported because KVM needs it. Also with the recent FPU rework it is much easier to get this wrong so I would not want for any OOT code to mess with it.
And again: It does not change whether or not ZFS can be used on Linux (excluding the license issue). They simply can't use crc32 with their SSE assembly and this is it.
Sebastian
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