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x86: don't include xen/xen.h in <asm/io.h> unless XEN is enabled

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Dmitry Kasatkin reports:
  "kernel-devel package with kernel headers have no <include/xen>
   directory if XEN is disabled.  Modules which inclide asm/io.h won't
   compile.

   XEN related content is behind the CONFIG_XEN flag in the io.h.  And
   <xen/xen.h> should be also behind CONFIG_XEN flag."

So move the include of <xen/xen.h> down into the section that is
conditional on CONFIG_XEN.

Reported-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2011-08-03 22:00:38 -10:00
parent 0ea648441a
commit 33f35f2a4e
1 changed files with 1 additions and 2 deletions
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3
arch/x86/include/asm/io.h
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@ -40,8 +40,6 @@
#include <linux/compiler.h>
#include <asm/page.h>
#include <xen/xen.h>
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
@ -334,6 +332,7 @@ extern void fixup_early_ioremap(void);
extern bool is_early_ioremap_ptep(pte_t *ptep);
#ifdef CONFIG_XEN
#include <xen/xen.h>
struct bio_vec;
extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,