diff options
| -rw-r--r-- | arch/x86/xen/p2m.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index 24cd9d1..8676f35 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -428,8 +428,6 @@ void __init xen_build_dynamic_phys_to_machine(void) } p2m_top[topidx][mididx] = &mfn_list[pfn]; } - - m2p_override_init(); } #ifdef CONFIG_X86_64 unsigned long __init xen_revector_p2m_tree(void) @@ -500,13 +498,15 @@ unsigned long __init xen_revector_p2m_tree(void) } /* This should be the leafs allocated for identity from _brk. */ } - return (unsigned long)mfn_list; + m2p_override_init(); + return (unsigned long)mfn_list; } #else unsigned long __init xen_revector_p2m_tree(void) { use_brk = 0; + m2p_override_init(); return 0; } #endif @@ -796,15 +796,16 @@ bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) #define M2P_OVERRIDE_HASH_SHIFT 10 #define M2P_OVERRIDE_HASH (1 << M2P_OVERRIDE_HASH_SHIFT) -static RESERVE_BRK_ARRAY(struct list_head, m2p_overrides, M2P_OVERRIDE_HASH); +static struct list_head *m2p_overrides; static DEFINE_SPINLOCK(m2p_override_lock); static void __init m2p_override_init(void) { unsigned i; - m2p_overrides = extend_brk(sizeof(*m2p_overrides) * M2P_OVERRIDE_HASH, - sizeof(unsigned long)); + m2p_overrides = alloc_bootmem_align( + sizeof(*m2p_overrides) * M2P_OVERRIDE_HASH, + sizeof(unsigned long)); for (i = 0; i < M2P_OVERRIDE_HASH; i++) INIT_LIST_HEAD(&m2p_overrides[i]); @@ -932,10 +933,14 @@ EXPORT_SYMBOL_GPL(set_foreign_p2m_mapping); static struct page *m2p_find_override(unsigned long mfn) { unsigned long flags; - struct list_head *bucket = &m2p_overrides[mfn_hash(mfn)]; + struct list_head *bucket; struct page *p, *ret; + if (unlikely(!m2p_overrides)) + return NULL; + ret = NULL; + bucket = &m2p_overrides[mfn_hash(mfn)]; spin_lock_irqsave(&m2p_override_lock, flags); |