linux/arch/x86/mm/mm_internal.h

#ifndef __X86_MM_INTERNAL_H
#define __X86_MM_INTERNAL_H

void *alloc_low_pages(unsigned int num);
static inline void *alloc_low_page(void)
{
	return alloc_low_pages(1);
}

#endif	/* __X86_MM_INTERNAL_H */
x86, mm: Merge alloc_low_page between 64bit and 32bit They are almost same except 64 bit need to handle after_bootmem case. Add mm_internal.h to make that alloc_low_page() only to be accessible from arch/x86/mm/init*.c Signed-off-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1353123563-3103-25-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 2012-11-17 03:39:01 +00:00			`#ifndef __X86_MM_INTERNAL_H`
			`#define __X86_MM_INTERNAL_H`

x86, mm: Add alloc_low_pages(num) 32bit kmap mapping needs pages to be used for low to high. At this point those pages are still from pgt_buf_* from BRK, so it is ok now. But we want to move early_ioremap_page_table_range_init() out of init_memory_mapping() and only call it one time later, that will make page_table_range_init/page_table_kmap_check/alloc_low_page to use memblock to get page. memblock allocation for pages are from high to low. So will get panic from page_table_kmap_check() that has BUG_ON to do ordering checking. This patch add alloc_low_pages to make it possible to allocate serveral pages at first, and hand out pages one by one from low to high. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1353123563-3103-28-git-send-email-yinghai@kernel.org Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 2012-11-17 03:39:04 +00:00			`void *alloc_low_pages(unsigned int num);`
			`static inline void *alloc_low_page(void)`
			`{`
			`return alloc_low_pages(1);`
			`}`
x86, mm: Merge alloc_low_page between 64bit and 32bit They are almost same except 64 bit need to handle after_bootmem case. Add mm_internal.h to make that alloc_low_page() only to be accessible from arch/x86/mm/init*.c Signed-off-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1353123563-3103-25-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 2012-11-17 03:39:01 +00:00
			`#endif /* __X86_MM_INTERNAL_H */`