Messages in this thread | | | Date | Thu, 13 Dec 2012 17:23:04 +0100 | From | Florian Fainelli <> | Subject | Re: [RFC GIT PULL] "Nuke 386-DX/SX support" changes for v3.8 |
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Le 12/12/12 19:04, Linus Torvalds a écrit : > On Tue, Dec 11, 2012 at 3:10 AM, Ingo Molnar <mingo@kernel.org> wrote: >> >> This tree removes ancient-386-CPUs support and thus zaps quite a >> bit of complexity: > > Btw, I think we should probably at least consider taking this one step > further, and remove the dear old FPU emulation support too. Remove > CONFIG_MATH_EMULATION and all of arch/x86/math-emu, along with a lot > of small special cases. > > Or do people still use the 486SX?
Yes, the RDC-R321x SoC which is supported by mainline actually needs Math emulation to properly work.
> > Now, the math emulation hasn't been all that fundamentally problematic > (compared to lack of xadd etc), but it does result in some > complexities in exception handling and ptrace (grep for HAVE_HWFP or > "hard_math" or a number of other magic things). None of which have > likely been tested at all in the last ten years, so who knows if it > actually *works* or not. > > Maybe somebody could try booting with "no387". Does it actually work?
Ok, I could try that. -- Florian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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