Commit ace63e37 authored by Ingo Molnar's avatar Ingo Molnar

x86: add kernel_map_pages() to 64-bit

needed for DEBUG_PAGEALLOC support and for unification.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent f5a50ce1
......@@ -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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