I'm seeing this with the current x86.git:
arch/x86/mm/built-in.o: In function `fix_to_virt':
/home/jeremy/hg/xen/paravirt/linux-i386/include2/asm/fixmap_32.h:157: undefined
reference to `__this_fixmap_does_not_exist'
It appears to be coming from ioremap_32.c.
I can't see any particular change which would have caused this, but this
loop in early_ioremap_reset:
for (idx = FIX_BTMAP_BEGIN; idx <= FIX_BTMAP_END; idx--) {
addr = fix_to_virt(idx);
pte = early_ioremap_pte(addr);
if (!*pte & _PAGE_PRESENT) {
phys = *pte & PAGE_MASK;
set_fixmap(idx, phys);
}
}
seems incompatible with the test in fix_to_virt:
/*
* this branch gets completely eliminated after inlining,
* except when someone tries to use fixaddr indices in an
* illegal way. (such as mixing up address types or using
* out-of-range indices).
*
* If it doesn't get removed, the linker will complain
* loudly with a reasonably clear error message..
*/
if (idx >= __end_of_fixed_addresses)
__this_fixmap_does_not_exist();
While the compiler could prove that idx is within range here, it seems a
bit much to require it to.
J
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