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Message-ID: <CAMzpN2j1-Pa0JrVBnpFJHV++-Kw7FjSvf1gEYy1+HZNJHt-CUQ@mail.gmail.com> Date: Wed, 12 Mar 2014 12:18:10 -0400 From: Brian Gerst <brgerst@...il.com> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Stefani Seibold <stefani@...bold.net>, Andy Lutomirski <luto@...capital.net>, "H. Peter Anvin" <hpa@...ux.intel.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "the arch/x86 maintainers" <x86@...nel.org>, Dave Jones <davej@...hat.com>, Martin Runge <Martin.Runge@...de-schwarz.com>, Andreas Brief <Andreas.Brief@...de-schwarz.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: Re: [PATCH v2] x86: Remove compat vdso support On Wed, Mar 12, 2014 at 12:04 PM, Linus Torvalds <torvalds@...ux-foundation.org> wrote: > On Wed, Mar 12, 2014 at 8:46 AM, Linus Torvalds > <torvalds@...ux-foundation.org> wrote: >> >> But I think that "x86, vdso: Add 32 bit VDSO time support for 32 bit >> kernel" patch needs to die. And the helper patches building up to it >> (just because that patch used [io_]remap_pfn_range()) should die too. >> Why weren't those pages in the vdso*_pages[] array anyway? > > Sorry, confused. FIXMAP, not vdso_pages. > > Anyway, that's what x86-64 does. Why not 32? A 32-bit process running on a 64-bit kernel cannot access the high fixmap mappings. The VVAR/HPET pages have to be mapped below 4GB. -- Brian Gerst -- 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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