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SubjectRe: arch/x86_64/mm/numa.c(124): remark #593: variable "bootmap_size" was set but nev
On Wed, 22 Nov 2006, Andi Kleen wrote:

> "d binderman" <> writes:
>> Hello there,
>> I just tried to compile Linux kernel with the Intel C
>> C compiler.
>> The compiler said
>> arch/x86_64/mm/numa.c(124): remark #593: variable "bootmap_size" was
>> set but never used
> Actually it looks like a real bug -- probably added recently with the
> new bootmap code.
> The bootmap should be reserved based on that size.

I checked the arch-independent sizing patches submitted related to x86_64
and no line is changed that does anything with bootmap_size so that ruled
out an obvious candidate. I did a diff on a grep for bootmap_size in
arch/x86_64 and found that there is no difference in usage between 2.6.18
and 2.6.19-rc6. Both call reserve_bootmem(bootmap, bootmap_size) which has
changed. However, the changes seem to be more cosmetic than anything else
using PFN_DOWN and PFN_UP instead of some_value/PAGE_SIZE so it's not
super-clear where the warning is coming from.

Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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