slabinfo: fall back from /sys/kernel/slab to /sys/slab

[linux-2.6-omap-h63xx.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 153a54b2013ca9927edf1dda4e047a82a952c05e..ce3c9e4492d803b011f50ea8641e477056116ddd 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -134,11 +134,9 @@ void pmd_clear_bad(pmd_t *pmd)
  */
 static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd)
 {
-       struct page *page = pmd_page(*pmd);
+       pgtable_t token = pmd_pgtable(*pmd);
        pmd_clear(pmd);
-       pte_lock_deinit(page);
-       pte_free_tlb(tlb, page);
-       dec_zone_page_state(page, NR_PAGETABLE);
+       pte_free_tlb(tlb, token);
        tlb->mm->nr_ptes--;
 }
 
@@ -309,21 +307,19 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
 
 int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
 {
-       struct page *new = pte_alloc_one(mm, address);
+       pgtable_t new = pte_alloc_one(mm, address);
        if (!new)
                return -ENOMEM;
 
-       pte_lock_init(new);
        spin_lock(&mm->page_table_lock);
-       if (pmd_present(*pmd)) {        /* Another has populated it */
-               pte_lock_deinit(new);
-               pte_free(mm, new);
-       } else {
+       if (!pmd_present(*pmd)) {       /* Has another populated it ? */
                mm->nr_ptes++;
-               inc_zone_page_state(new, NR_PAGETABLE);
                pmd_populate(mm, pmd, new);
+               new = NULL;
        }
        spin_unlock(&mm->page_table_lock);
+       if (new)
+               pte_free(mm, new);
        return 0;
 }
 
@@ -334,11 +330,13 @@ int __pte_alloc_kernel(pmd_t *pmd, unsigned long address)
                return -ENOMEM;
 
        spin_lock(&init_mm.page_table_lock);
-       if (pmd_present(*pmd))          /* Another has populated it */
-               pte_free_kernel(&init_mm, new);
-       else
+       if (!pmd_present(*pmd)) {       /* Has another populated it ? */
                pmd_populate_kernel(&init_mm, pmd, new);
+               new = NULL;
+       }
        spin_unlock(&init_mm.page_table_lock);
+       if (new)
+               pte_free_kernel(&init_mm, new);
        return 0;
 }
 
@@ -991,6 +989,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
        int i;
        unsigned int vm_flags;
 
+       if (len <= 0)
+               return 0;
        /* 
         * Require read or write permissions.
         * If 'force' is set, we only require the "MAY" flags.
@@ -1390,7 +1390,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 {
        pte_t *pte;
        int err;
-       struct page *pmd_page;
+       pgtable_t token;
        spinlock_t *uninitialized_var(ptl);
 
        pte = (mm == &init_mm) ?
@@ -1401,10 +1401,10 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 
        BUG_ON(pmd_huge(*pmd));
 
-       pmd_page = pmd_page(*pmd);
+       token = pmd_pgtable(*pmd);
 
        do {
-               err = fn(pte, pmd_page, addr, data);
+               err = fn(pte, token, addr, data);
                if (err)
                        break;
        } while (pte++, addr += PAGE_SIZE, addr != end);
@@ -2711,6 +2711,13 @@ void print_vma_addr(char *prefix, unsigned long ip)
        struct mm_struct *mm = current->mm;
        struct vm_area_struct *vma;
 
+       /*
+        * Do not print if we are in atomic
+        * contexts (in exception stacks, etc.):
+        */
+       if (preempt_count())
+               return;
+
        down_read(&mm->mmap_sem);
        vma = find_vma(mm, ip);
        if (vma && vma->vm_file) {
@@ -2719,7 +2726,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
                if (buf) {
                        char *p, *s;
 
-                       p = d_path(f->f_dentry, f->f_vfsmnt, buf, PAGE_SIZE);
+                       p = d_path(&f->f_path, buf, PAGE_SIZE);
                        if (IS_ERR(p))
                                p = "?";
                        s = strrchr(p, '/');