From: Jan Beulich Date: Wed, 15 Dec 2021 09:24:45 +0000 (+0100) Subject: Arm: drop memguard_{,un}guard_range() stubs X-Git-Tag: archive/raspbian/4.17.0-1+rpi1^2~33^2~1217 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=9956fdc70f99b0f133be7f16f62417928a84622c;p=xen.git Arm: drop memguard_{,un}guard_range() stubs 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 Acked-by: Julien Grall --- diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h index 7b5e7b7f69..424aaf2823 100644 --- a/xen/arch/arm/include/asm/mm.h +++ b/xen/arch/arm/include/asm/mm.h @@ -341,10 +341,6 @@ long arch_memory_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg); 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); diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c index 653f1ab09f..38eea879c0 100644 --- a/xen/common/page_alloc.c +++ b/xen/common/page_alloc.c @@ -2152,8 +2152,6 @@ void init_xenheap_pages(paddr_t ps, paddr_t pe) 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 order, unsigned int memflags) 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, unsigned int order) if ( v == NULL ) return; - memguard_guard_range(v, 1 << (order + PAGE_SHIFT)); - free_heap_pages(virt_to_page(v), order, false); }