Control: tag -1 moreinfo
On Wed, 2013-06-12 at 23:46 +0000, Bjarni Ingi Gislason wrote:
> Package: linux-source-3.2
> Version: 3.2.46-1
> Severity: important
>
> Dear Maintainer,
>
> * What led up to the situation?
>
> Compiling error:
>
> In file included from include/linux/mm_types.h:15:0,
> from include/linux/sched.h:64,
> from arch/x86/kernel/asm-offsets.c:9:
> include/linux/rcupdate.h: In function '__kfree_rcu':
> include/linux/rcupdate.h:834:2: error: size of unnamed array is negative
> make[1]: *** [arch/x86/kernel/asm-offsets.s] Error 1
> make: *** [prepare0] Error 2
>
> Line 834 is BUILD_BUG_ON... in
>
> static __always_inline
> void __kfree_rcu(struct rcu_head *head, unsigned long offset)
> {
> typedef void (*rcu_callback)(struct rcu_head *);
>
> BUILD_BUG_ON(!__builtin_constant_p(offset));
>
>
> "offset" is declared as an "unsigned long" so can't be negative!
This is a build-time assertion that the caller is passing a compile-time
constant for offset. If the assertion fails it triggers this weird
'size of unnamed array is negative' error.
But nothing in asm-offsets.c will be calling it, so this doesn't make
sense to me.
You forgot to attach your .config.
Ben.
--
Ben Hutchings
friends: People who know you well, but like you anyway.
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