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authorJiri Slaby <jirislaby@gmail.com>2008-06-12 13:56:40 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-19 13:31:42 +0200
commit59ea746337c69f6a5f1bc4d5e8544b3cbf12f801 (patch)
tree118c9c69eb8a2f6a22c62967ec36288153c87303 /mm/vmalloc.c
parent952f4a0a9b27e6dbd5d32e330b3f609ebfa0b061 (diff)
downloadop-kernel-dev-59ea746337c69f6a5f1bc4d5e8544b3cbf12f801.zip
op-kernel-dev-59ea746337c69f6a5f1bc4d5e8544b3cbf12f801.tar.gz
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 <jirislaby@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 6e45b0f..dc41e9c 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)) {
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