X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fshmem.c;h=76ecbac0d55bd8578de1f67d7655cf4b0babe995;hb=54f9f80d6543fb7b157d3b11e2e7911dc1379790;hp=fcd19d323f9f68079f92c4899218411f4f97d50b;hpb=b981d8b3f5e008ff10d993be633ad00564fc22cd;p=linux-2.6

diff --git a/mm/shmem.c b/mm/shmem.c
index fcd19d323f..76ecbac0d5 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -49,7 +49,6 @@
 #include <linux/ctype.h>
 #include <linux/migrate.h>
 #include <linux/highmem.h>
-#include <linux/backing-dev.h>
 
 #include <asm/uaccess.h>
 #include <asm/div64.h>
@@ -96,9 +95,9 @@ static inline struct page *shmem_dir_alloc(gfp_t gfp_mask)
 	 * BLOCKS_PER_PAGE on indirect pages, assume PAGE_CACHE_SIZE:
 	 * might be reconsidered if it ever diverges from PAGE_SIZE.
 	 *
-	 * __GFP_MOVABLE is masked out as swap vectors cannot move
+	 * Mobility flags are masked out as swap vectors cannot move
 	 */
-	return alloc_pages((gfp_mask & ~__GFP_MOVABLE) | __GFP_ZERO,
+	return alloc_pages((gfp_mask & ~GFP_MOVABLE_MASK) | __GFP_ZERO,
 				PAGE_CACHE_SHIFT-PAGE_SHIFT);
 }
 
@@ -972,7 +971,7 @@ static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_
 		*nodelist++ = '\0';
 		if (nodelist_parse(nodelist, *policy_nodes))
 			goto out;
-		if (!nodes_subset(*policy_nodes, node_online_map))
+		if (!nodes_subset(*policy_nodes, node_states[N_HIGH_MEMORY]))
 			goto out;
 	}
 	if (!strcmp(value, "default")) {
@@ -997,9 +996,11 @@ static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_
 			err = 0;
 	} else if (!strcmp(value, "interleave")) {
 		*policy = MPOL_INTERLEAVE;
-		/* Default to nodes online if no nodelist */
+		/*
+		 * Default to online nodes with memory if no nodelist
+		 */
 		if (!nodelist)
-			*policy_nodes = node_online_map;
+			*policy_nodes = node_states[N_HIGH_MEMORY];
 		err = 0;
 	}
 out:
@@ -1061,7 +1062,8 @@ shmem_alloc_page(gfp_t gfp, struct shmem_inode_info *info,
 	return page;
 }
 #else
-static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_nodes)
+static inline int shmem_parse_mpol(char *value, int *policy,
+						nodemask_t *policy_nodes)
 {
 	return 1;
 }
@@ -1109,7 +1111,7 @@ static int shmem_getpage(struct inode *inode, unsigned long idx,
 	 * Normally, filepage is NULL on entry, and either found
 	 * uptodate immediately, or allocated and zeroed, or read
 	 * in under swappage, which is then assigned to filepage.
-	 * But shmem_readpage and shmem_prepare_write pass in a locked
+	 * But shmem_readpage and shmem_write_begin pass in a locked
 	 * filepage, which may be found not uptodate by other callers
 	 * too, and may need to be copied from the swappage read in.
 	 */
@@ -1446,7 +1448,7 @@ static const struct inode_operations shmem_symlink_inode_operations;
 static const struct inode_operations shmem_symlink_inline_operations;
 
 /*
- * Normally tmpfs avoids the use of shmem_readpage and shmem_prepare_write;
+ * Normally tmpfs avoids the use of shmem_readpage and shmem_write_begin;
  * but providing them allows a tmpfs file to be used for splice, sendfile, and
  * below the loop driver, in the generic fashion that many filesystems support.
  */
@@ -1459,10 +1461,30 @@ static int shmem_readpage(struct file *file, struct page *page)
 }
 
 static int
-shmem_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to)
+shmem_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned flags,
+			struct page **pagep, void **fsdata)
 {
-	struct inode *inode = page->mapping->host;
-	return shmem_getpage(inode, page->index, &page, SGP_WRITE, NULL);
+	struct inode *inode = mapping->host;
+	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+	*pagep = NULL;
+	return shmem_getpage(inode, index, pagep, SGP_WRITE, NULL);
+}
+
+static int
+shmem_write_end(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned copied,
+			struct page *page, void *fsdata)
+{
+	struct inode *inode = mapping->host;
+
+	set_page_dirty(page);
+	page_cache_release(page);
+
+	if (pos+copied > inode->i_size)
+		i_size_write(inode, pos+copied);
+
+	return copied;
 }
 
 static ssize_t
@@ -2219,7 +2241,7 @@ static int shmem_fill_super(struct super_block *sb,
 	unsigned long blocks = 0;
 	unsigned long inodes = 0;
 	int policy = MPOL_DEFAULT;
-	nodemask_t policy_nodes = node_online_map;
+	nodemask_t policy_nodes = node_states[N_HIGH_MEMORY];
 
 #ifdef CONFIG_TMPFS
 	/*
@@ -2338,8 +2360,8 @@ static const struct address_space_operations shmem_aops = {
 	.set_page_dirty	= __set_page_dirty_no_writeback,
 #ifdef CONFIG_TMPFS
 	.readpage	= shmem_readpage,
-	.prepare_write	= shmem_prepare_write,
-	.commit_write	= simple_commit_write,
+	.write_begin	= shmem_write_begin,
+	.write_end	= shmem_write_end,
 #endif
 	.migratepage	= migrate_page,
 };