From: Jeremy Fitzhardinge Date: Wed, 2 Apr 2008 17:54:12 +0000 (-0700) Subject: xen: allow compilation with non-flat memory X-Git-Tag: firefly_0821_release~21542^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=af7ae3b9c4a4c1337903f31131d58e3c0d2b6d55;p=firefly-linux-kernel-4.4.55.git xen: allow compilation with non-flat memory 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index 4d5f2649bee4..2e641be2737e 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -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 diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index bc129146f99f..c8a56e457d61 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -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))); }