Hi Attilio,

FYI, there are new sparse warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git linux-next
head:   3153e9a8aa96bd1f11988c7c70d9372f00b615a1
commit: 73090f8993a40a2f67fed1ab866a928c68cd3765 [4/27] x86: Remove base argument from x86_init.paging.pagetable_setup_start

All sparse warnings:

+ arch/x86/kernel/x86_init.c:29:13: sparse: symbol 'x86_init_pgd_start_noop' was not declared. Should it be static?
+ arch/x86/kernel/x86_init.c:30:13: sparse: symbol 'x86_init_pgd_done_noop' was not declared. Should it be static?
  arch/x86/kernel/x86_init.c:31:12: sparse: symbol 'iommu_init_noop' was not declared. Should it be static?
  arch/x86/kernel/x86_init.c:32:6: sparse: symbol 'iommu_shutdown_noop' was not declared. Should it be static?

vim +29 arch/x86/kernel/x86_init.c
    19	#include <asm/time.h>
    20	#include <asm/irq.h>
    21	#include <asm/io_apic.h>
    22	#include <asm/pat.h>
    23	#include <asm/tsc.h>
    24	#include <asm/iommu.h>
    25	#include <asm/mach_traps.h>
    26	
    27	void __cpuinit x86_init_noop(void) { }
    28	void __init x86_init_uint_noop(unsigned int unused) { }
  > 29	void __init x86_init_pgd_start_noop(void) { }
    30	void __init x86_init_pgd_done_noop(pgd_t *unused) { }
    31	int __init iommu_init_noop(void) { return 0; }
    32	void iommu_shutdown_noop(void) { }
    33	
    34	/*
    35	 * The platform setup functions are preset with the default functions
    36	 * for standard PC hardware.
    37	 */
    38	struct x86_init_ops x86_init __initdata = {
    39	

Please consider folding the attached diff :-)

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0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu <wfg@linux.intel.com>                     Intel Corporation