On Thu, Feb 15, 2007 at 05:52:59PM +0100, Ingo Molnar wrote: > provide an optimized assembly version of sys_umem_add().
> --- linux.orig/arch/i386/lib/getuser.S > +++ linux/arch/i386/lib/getuser.S > +sys_umem_add: > + movl 0x4(%esp), %ecx # uptr > + movl 0x8(%esp), %edx # inc > + > + cmpl $__PAGE_OFFSET, %ecx # access_ok(uptr) > + jae bad_sys_umem_add > + > +1: addl %edx, (%ecx) # *uptr += inc > +2: movl (%ecx), %eax # return *uptr > + ret > + > +bad_sys_umem_add: > + movl $-14, %eax We have EFAULT for this. ;-) > + ret > + > +.section __ex_table,"a" > + .long 1b, bad_sys_umem_add > + .long 2b, bad_sys_umem_add > +.previous - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
