From 4fee9ad84e9648a3cb07586501d283d3aef9f923 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Tue, 14 Mar 2017 18:35:53 +0100 Subject: [PATCH] xen/balloon: decorate PV-only parts with #ifdef CONFIG_XEN_PV Balloon driver uses several PV-only concepts (xen_start_info, xen_extra_mem,..) and it seems the simpliest solution to make HVM-only build happy is to decorate these parts with #ifdefs. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Juergen Gross Signed-off-by: Juergen Gross --- drivers/xen/balloon.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index a6d4378eb8d9..50dcb68d8070 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -709,6 +709,7 @@ void free_xenballooned_pages(int nr_pages, struct page **pages) } EXPORT_SYMBOL(free_xenballooned_pages); +#ifdef CONFIG_XEN_PV static void __init balloon_add_region(unsigned long start_pfn, unsigned long pages) { @@ -732,19 +733,22 @@ static void __init balloon_add_region(unsigned long start_pfn, balloon_stats.total_pages += extra_pfn_end - start_pfn; } +#endif static int __init balloon_init(void) { - int i; - if (!xen_domain()) return -ENODEV; pr_info("Initialising balloon driver\n"); +#ifdef CONFIG_XEN_PV balloon_stats.current_pages = xen_pv_domain() ? min(xen_start_info->nr_pages - xen_released_pages, max_pfn) : get_num_physpages(); +#else + balloon_stats.current_pages = get_num_physpages(); +#endif balloon_stats.target_pages = balloon_stats.current_pages; balloon_stats.balloon_low = 0; balloon_stats.balloon_high = 0; @@ -761,14 +765,20 @@ static int __init balloon_init(void) register_sysctl_table(xen_root); #endif - /* - * Initialize the balloon with pages from the extra memory - * regions (see arch/x86/xen/setup.c). - */ - for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) - if (xen_extra_mem[i].n_pfns) - balloon_add_region(xen_extra_mem[i].start_pfn, - xen_extra_mem[i].n_pfns); +#ifdef CONFIG_XEN_PV + { + int i; + + /* + * Initialize the balloon with pages from the extra memory + * regions (see arch/x86/xen/setup.c). + */ + for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) + if (xen_extra_mem[i].n_pfns) + balloon_add_region(xen_extra_mem[i].start_pfn, + xen_extra_mem[i].n_pfns); + } +#endif return 0; } -- 2.20.1