Russell King wrote:
>On Thu, Nov 28, 2002 at 11:34:20PM +0100, Manfred Spraul wrote:
>
>
>>On i386, it's possible to skip set_fs() and use __get_user() - but
>>that's i386 specific. For example the i386 oops code uses that.
>>
>>
>
>That isn't actually an x86 specific feature - it is a requirement across
>all architectures that get_user() and friends can access kernel areas
>after set_fs(get_ds())
>
>
It's i386 specific that
__get_user().
is equivalent to
set_fs(KERNEL_DS)
get_user()
arch/i386/kernel/traps.c uses that in the fault code.
Portable code must use set_fs()/get_user(), i386 specific code can
continue to use __get_user().
--
Manfred
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This archive was generated by hypermail 2b29 : Sat Nov 30 2002 - 22:00:23 EST