These exist for no reason: The code using them is only ever built for Arm32. And memguard_guard_stack() has no use outside of x86-specific code at all.
Signed-off-by: Jan Beulich <[email protected]> --- a/xen/common/page_alloc.c +++ b/xen/common/page_alloc.c @@ -2152,8 +2152,6 @@ void init_xenheap_pages(paddr_t ps, padd if ( !is_xen_heap_mfn(maddr_to_mfn(pe)) ) pe -= PAGE_SIZE; - memguard_guard_range(maddr_to_virt(ps), pe - ps); - init_heap_pages(maddr_to_page(ps), (pe - ps) >> PAGE_SHIFT); } @@ -2169,8 +2167,6 @@ void *alloc_xenheap_pages(unsigned int o if ( unlikely(pg == NULL) ) return NULL; - memguard_unguard_range(page_to_virt(pg), 1 << (order + PAGE_SHIFT)); - return page_to_virt(pg); } @@ -2182,8 +2178,6 @@ void free_xenheap_pages(void *v, unsigne if ( v == NULL ) return; - memguard_guard_range(v, 1 << (order + PAGE_SHIFT)); - free_heap_pages(virt_to_page(v), order, false); } --- a/xen/include/asm-arm/mm.h +++ b/xen/include/asm-arm/mm.h @@ -341,10 +341,6 @@ long arch_memory_op(int op, XEN_GUEST_HA unsigned long domain_get_maximum_gpfn(struct domain *d); -#define memguard_guard_stack(_p) ((void)0) -#define memguard_guard_range(_p,_l) ((void)0) -#define memguard_unguard_range(_p,_l) ((void)0) - /* Release all __init and __initdata ranges to be reused */ void free_init_memory(void);
