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xen: allow compilation with non-flat memory

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There's no real reason we can't support sparsemem/discontigmem, so do so.
This is mostly useful to support hotplug memory.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge 2008-04-02 10:54:12 -07:00 committed by Ingo Molnar
parent b77797fb2b
commit af7ae3b9c4
2 changed files with 3 additions and 1 deletions
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2
arch/x86/xen/Kconfig
View file

@ -6,7 +6,7 @@ config XEN
bool "Xen guest support"
select PARAVIRT
depends on X86_32
depends on X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES && !(X86_VISWS || X86_VOYAGER)
depends on X86_CMPXCHG && X86_TSC && !(X86_VISWS || X86_VOYAGER)
help
This is the Linux Xen port. Enabling this will allow the
kernel to boot in a paravirtualized environment under the

2
arch/x86/xen/enlighten.c
View file

@ -669,7 +669,9 @@ static void xen_write_cr3(unsigned long cr3)
everything is pinned. */
static __init void xen_alloc_pte_init(struct mm_struct *mm, u32 pfn)
{
#ifdef CONFIG_FLATMEM
BUG_ON(mem_map); /* should only be used early */
#endif
make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
}