mm: don't let userspace spam allocations warnings

[uclinux-h8/linux.git] / mm / shmem.c

diff --git a/mm/shmem.c b/mm/shmem.c
index cddc72a..0905215 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -109,12 +109,14 @@ struct shmem_falloc {
 #ifdef CONFIG_TMPFS
 static unsigned long shmem_default_max_blocks(void)
 {
-       return totalram_pages / 2;
+       return totalram_pages() / 2;
 }
 
 static unsigned long shmem_default_max_inodes(void)
 {
-       return min(totalram_pages - totalhigh_pages, totalram_pages / 2);
+       unsigned long nr_pages = totalram_pages();
+
+       return min(nr_pages - totalhigh_pages(), nr_pages / 2);
 }
 #endif
 
@@ -661,9 +663,7 @@ static int shmem_free_swap(struct address_space *mapping,
 {
        void *old;
 
-       xa_lock_irq(&mapping->i_pages);
-       old = __xa_cmpxchg(&mapping->i_pages, index, radswap, NULL, 0);
-       xa_unlock_irq(&mapping->i_pages);
+       old = xa_cmpxchg_irq(&mapping->i_pages, index, radswap, NULL, 0);
        if (old != radswap)
                return -ENOENT;
        free_swap_and_cache(radix_to_swp_entry(radswap));
@@ -760,7 +760,7 @@ void shmem_unlock_mapping(struct address_space *mapping)
                        break;
                index = indices[pvec.nr - 1] + 1;
                pagevec_remove_exceptionals(&pvec);
-               check_move_unevictable_pages(pvec.pages, pvec.nr);
+               check_move_unevictable_pages(&pvec);
                pagevec_release(&pvec);
                cond_resched();
        }
@@ -1439,7 +1439,7 @@ static struct page *shmem_alloc_hugepage(gfp_t gfp,
 
        shmem_pseudo_vma_init(&pvma, info, hindex);
        page = alloc_pages_vma(gfp | __GFP_COMP | __GFP_NORETRY | __GFP_NOWARN,
-                       HPAGE_PMD_ORDER, &pvma, 0, numa_node_id());
+                       HPAGE_PMD_ORDER, &pvma, 0, numa_node_id(), true);
        shmem_pseudo_vma_destroy(&pvma);
        if (page)
                prep_transhuge_page(page);
@@ -2854,10 +2854,14 @@ static int shmem_link(struct dentry *old_dentry, struct inode *dir, struct dentr
         * No ordinary (disk based) filesystem counts links as inodes;
         * but each new link needs a new dentry, pinning lowmem, and
         * tmpfs dentries cannot be pruned until they are unlinked.
+        * But if an O_TMPFILE file is linked into the tmpfs, the
+        * first link must skip that, to get the accounting right.
         */
-       ret = shmem_reserve_inode(inode->i_sb);
-       if (ret)
-               goto out;
+       if (inode->i_nlink) {
+               ret = shmem_reserve_inode(inode->i_sb);
+               if (ret)
+                       goto out;
+       }
 
        dir->i_size += BOGO_DIRENT_SIZE;
        inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);
@@ -3303,7 +3307,7 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo,
                        size = memparse(value,&rest);
                        if (*rest == '%') {
                                size <<= PAGE_SHIFT;
-                               size *= totalram_pages;
+                               size *= totalram_pages();
                                do_div(size, 100);
                                rest++;
                        }