Messages in this thread | | | Date | Tue, 8 Feb 2005 17:27:41 -0800 | From | Richard Henderson <> | Subject | Re: out-of-line x86 "put_user()" implementation |
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On Mon, Feb 07, 2005 at 05:20:06PM -0800, Linus Torvalds wrote: > +#define __put_user_8(x, ptr) __asm__ __volatile__("call __put_user_8":"=A" (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
This is not constrained enough. The compiler could choose to put the return value in edx. You want
__asm__ __volatile__("call __put_user_8":"=a" (__ret_pu) : "A" ((typeof(*(ptr)))(x)), "c" (ptr))
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