if (mm == &init_mm)		/* Temporary bridging hack */ spin_unlock(&mm->page_table_lock); 
pmd_t fastcall *__pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address){	pmd_t *new;	spin_unlock(&mm->page_table_lock);	new = pmd_alloc_one(mm, address);	spin_lock(&mm->page_table_lock);	if (!new)		return NULL;	/*	 * Because we dropped the lock, we should re-check the	 * entry, as somebody else could have populated it..	 */#ifndef __ARCH_HAS_4LEVEL_HACK	if (pud_present(*pud)) {		pmd_free(new);		goto out;	}	pud_populate(mm, pud, new);#else	if (pgd_present(*pud)) {		pmd_free(new);		goto out;	}	pgd_populate(mm, pud, new);#endif /* __ARCH_HAS_4LEVEL_HACK */ out:	return pmd_offset(pud, address);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/872fec16d9a0ed3b75b8893aa217e49cca575ee5/memory.c/clean/mm/memory.c