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;
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