hi, robert
u can go to search the info about sparse.
2009/9/22 Robert P. J. Day <[email protected]>:
>
> digging into kernel-user space copying and i can see that, depending
> on whether i'm running sparse, i'll get __chk_user_ptr() defined in
> one of two ways in <linux/compiler.h>:
>
> #ifdef __CHECKER__
> ...
> extern void __chk_user_ptr(const volatile void __user *);
> extern void __chk_io_ptr(const volatile void __iomem *);
> #else
> ...
> # define __chk_user_ptr(x) (void)0
> # define __chk_io_ptr(x) (void)0
> #endif
>
> but if i define __CHECKER__, where *is* the external definition of
> those two routines? i've grepped and can't see them. thanks.
>
> rday
> --
>
> ========================================================================
> Robert P. J. Day Waterloo, Ontario, CANADA
>
> Linux Consulting, Training and Annoying Kernel Pedantry.
>
> Web page: http://crashcourse.ca
> Twitter: http://twitter.com/rpjday
> ========================================================================
>
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--
Best Regards
Lin
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