[BUG] vmalloc_area_pages() in 2.4.2-ac25

[Tachino Nobuhiro]

  vmalloc_area_pages() in 2.4.2-ac25 seems to be broken. It calls
spin_lock(&init_mm.page_table_lock) twice and causes system hang.

inline int vmalloc_area_pages (unsigned long address, unsigned long size,
                               int gfp_mask, pgprot_t prot)
{
	pgd_t * dir;
	unsigned long end = address + size;
	int ret;

	dir = pgd_offset_k(address);
	flush_cache_all();
>>>>	spin_lock(&init_mm.page_table_lock);	
	do {
		pmd_t *pmd;
		
>>>>		spin_lock(&init_mm.page_table_lock);	/* pmd_alloc requires this */
		pmd = pmd_alloc(&init_mm, dir, address);
		spin_unlock(&init_mm.page_table_lock);
		ret = -ENOMEM;