From 59ea746337c69f6a5f1bc4d5e8544b3cbf12f801 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Thu, 12 Jun 2008 13:56:40 +0200 Subject: MM: virtual address debug Add some (configurable) expensive sanity checking to catch wrong address translations on x86. - create linux/mmdebug.h file to be able include this file in asm headers to not get unsolvable loops in header files - __phys_addr on x86_32 became a function in ioremap.c since PAGE_OFFSET, is_vmalloc_addr and VMALLOC_* non-constasts are undefined if declared in page_32.h - add __phys_addr_const for initializing doublefault_tss.__cr3 Tested on 386, 386pae, x86_64 and x86_64 numa=fake=2. Contains Andi's enable numa virtual address debug patch. Signed-off-by: Jiri Slaby Cc: Andi Kleen Signed-off-by: Ingo Molnar --- mm/vmalloc.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'mm/vmalloc.c') diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 6e45b0f3d12..dc41e9c8ca6 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -180,6 +180,11 @@ struct page *vmalloc_to_page(const void *vmalloc_addr) pmd_t *pmd; pte_t *ptep, pte; + /* XXX we might need to change this if we add VIRTUAL_BUG_ON for + * architectures that do not vmalloc module space */ + VIRTUAL_BUG_ON(!is_vmalloc_addr(vmalloc_addr) && + !is_module_address(addr)); + if (!pgd_none(*pgd)) { pud = pud_offset(pgd, addr); if (!pud_none(*pud)) { -- cgit v1.2.3