linux/include/asm-ia64/pgalloc.h
Andy Whitcroft 25ba77c141 [PATCH] numa node ids are int, page_to_nid and zone_to_nid should return int
NUMA node ids are passed as either int or unsigned int almost exclusivly
page_to_nid and zone_to_nid both return unsigned long.  This is a throw
back to when page_to_nid was a #define and was thus exposing the real type
of the page flags field.

In addition to fixing up the definitions of page_to_nid and zone_to_nid I
audited the users of these functions identifying the following incorrect
uses:

1) mm/page_alloc.c show_node() -- printk dumping the node id,
2) include/asm-ia64/pgalloc.h pgtable_quicklist_free() -- comparison
   against numa_node_id() which returns an int from cpu_to_node(), and
3) mm/mpolicy.c check_pte_range -- used as an index in node_isset which
   uses bit_set which in generic code takes an int.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00

164 lines
3.5 KiB
C

#ifndef _ASM_IA64_PGALLOC_H
#define _ASM_IA64_PGALLOC_H
/*
* This file contains the functions and defines necessary to allocate
* page tables.
*
* This hopefully works with any (fixed) ia-64 page-size, as defined
* in <asm/page.h> (currently 8192).
*
* Copyright (C) 1998-2001 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
*/
#include <linux/compiler.h>
#include <linux/mm.h>
#include <linux/page-flags.h>
#include <linux/threads.h>
#include <asm/mmu_context.h>
DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist);
#define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist)
DECLARE_PER_CPU(long, __pgtable_quicklist_size);
#define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size)
static inline long pgtable_quicklist_total_size(void)
{
long ql_size = 0;
int cpuid;
for_each_online_cpu(cpuid) {
ql_size += per_cpu(__pgtable_quicklist_size, cpuid);
}
return ql_size;
}
static inline void *pgtable_quicklist_alloc(void)
{
unsigned long *ret = NULL;
preempt_disable();
ret = pgtable_quicklist;
if (likely(ret != NULL)) {
pgtable_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
--pgtable_quicklist_size;
preempt_enable();
} else {
preempt_enable();
ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
}
return ret;
}
static inline void pgtable_quicklist_free(void *pgtable_entry)
{
#ifdef CONFIG_NUMA
int nid = page_to_nid(virt_to_page(pgtable_entry));
if (unlikely(nid != numa_node_id())) {
free_page((unsigned long)pgtable_entry);
return;
}
#endif
preempt_disable();
*(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist;
pgtable_quicklist = (unsigned long *)pgtable_entry;
++pgtable_quicklist_size;
preempt_enable();
}
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return pgtable_quicklist_alloc();
}
static inline void pgd_free(pgd_t * pgd)
{
pgtable_quicklist_free(pgd);
}
#ifdef CONFIG_PGTABLE_4
static inline void
pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
{
pgd_val(*pgd_entry) = __pa(pud);
}
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return pgtable_quicklist_alloc();
}
static inline void pud_free(pud_t * pud)
{
pgtable_quicklist_free(pud);
}
#define __pud_free_tlb(tlb, pud) pud_free(pud)
#endif /* CONFIG_PGTABLE_4 */
static inline void
pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
{
pud_val(*pud_entry) = __pa(pmd);
}
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return pgtable_quicklist_alloc();
}
static inline void pmd_free(pmd_t * pmd)
{
pgtable_quicklist_free(pmd);
}
#define __pmd_free_tlb(tlb, pmd) pmd_free(pmd)
static inline void
pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
{
pmd_val(*pmd_entry) = page_to_phys(pte);
}
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
{
pmd_val(*pmd_entry) = __pa(pte);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
return virt_to_page(pgtable_quicklist_alloc());
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long addr)
{
return pgtable_quicklist_alloc();
}
static inline void pte_free(struct page *pte)
{
pgtable_quicklist_free(page_address(pte));
}
static inline void pte_free_kernel(pte_t * pte)
{
pgtable_quicklist_free(pte);
}
#define __pte_free_tlb(tlb, pte) pte_free(pte)
extern void check_pgt_cache(void);
#endif /* _ASM_IA64_PGALLOC_H */