Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ace63e3743ae59fc0cce48450bd2e410776b4148
Commit: ace63e3743ae59fc0cce48450bd2e410776b4148
Parent: f5a50ce1bf53a07cb7d0bab1a87e62cc4f34f0ab
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:34:03 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:34:03 2008 +0100
x86: add kernel_map_pages() to 64-bit
needed for DEBUG_PAGEALLOC support and for unification.
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
arch/x86/mm/pageattr_64.c | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c
index 4053832..e1c8608 100644
--- a/arch/x86/mm/pageattr_64.c
+++ b/arch/x86/mm/pageattr_64.c
@@ -260,3 +260,33 @@ void global_flush_tlb(void)
on_each_cpu(flush_kernel_map, NULL, 1, 1);
}
EXPORT_SYMBOL(global_flush_tlb);
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+void kernel_map_pages(struct page *page, int numpages, int enable)
+{
+ if (PageHighMem(page))
+ return;
+ if (!enable) {
+ debug_check_no_locks_freed(page_address(page),
+ numpages * PAGE_SIZE);
+ }
+
+ /*
+ * If page allocator is not up yet then do not call c_p_a():
+ */
+ if (!debug_pagealloc_enabled)
+ return;
+
+ /*
+ * the return value is ignored - the calls cannot fail,
+ * large pages are disabled at boot time.
+ */
+ change_page_attr(page, numpages, enable ? PAGE_KERNEL : __pgprot(0));
+
+ /*
+ * we should perform an IPI and flush all tlbs,
+ * but that can deadlock->flush only current cpu.
+ */
+ __flush_tlb_all();
+}
+#endif
-
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