Messages in this thread | | | Date | Wed, 28 Jan 2009 14:13:35 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH] x86: do not expose CONFIG_BSWAP to userspace |
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On Wed, 28 Jan 2009, Harvey Harrison wrote: > > Use ifdef __i486__ to ensure the BSWAP instruction is available > on 32-bit x86. > > Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> > --- > HPA, > > I'm afraid my knowledge of gcc compiler flags for various models is > lacking, I used i486 as suggested, just wanted to make sure I understood > you corectly.
I really don't think this works.
Try this:
cpp -dM -m32 -march=pentium t.c | grep i486
and see the marked absense of __i486__ anywhere.
At least CONFIG_X86_BSWAP gives the right behaviour for the kernel.
Linus
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