X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2Fshmem.c;h=882053031aa0590b502551783c8902b50461abf1;hb=40f5a0ce2501d62d8653cb1fbfeb80e2a7013933;hp=4bb28d218eb5caf064026e479873cc994e282a88;hpb=6bfe5c9d6f4dcaa998f67e691359cf7b1c4b443d;p=linux-2.6-omap-h63xx.git

diff --git a/mm/shmem.c b/mm/shmem.c
index 4bb28d218eb..882053031aa 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -178,9 +178,9 @@ static inline void shmem_unacct_blocks(unsigned long flags, long pages)
 static struct super_operations shmem_ops;
 static const struct address_space_operations shmem_aops;
 static const struct file_operations shmem_file_operations;
-static struct inode_operations shmem_inode_operations;
-static struct inode_operations shmem_dir_inode_operations;
-static struct inode_operations shmem_special_inode_operations;
+static const struct inode_operations shmem_inode_operations;
+static const struct inode_operations shmem_dir_inode_operations;
+static const struct inode_operations shmem_special_inode_operations;
 static struct vm_operations_struct shmem_vm_ops;
 
 static struct backing_dev_info shmem_backing_dev_info  __read_mostly = {
@@ -515,7 +515,12 @@ static void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end)
 			size = SHMEM_NR_DIRECT;
 		nr_swaps_freed = shmem_free_swp(ptr+idx, ptr+size);
 	}
-	if (!topdir)
+
+	/*
+	 * If there are no indirect blocks or we are punching a hole
+	 * below indirect blocks, nothing to be done.
+	 */
+	if (!topdir || (punch_hole && (limit <= SHMEM_NR_DIRECT)))
 		goto done2;
 
 	BUG_ON(limit <= SHMEM_NR_DIRECT);
@@ -1405,8 +1410,8 @@ shmem_get_inode(struct super_block *sb, int mode, dev_t dev)
 }
 
 #ifdef CONFIG_TMPFS
-static struct inode_operations shmem_symlink_inode_operations;
-static struct inode_operations shmem_symlink_inline_operations;
+static const struct inode_operations shmem_symlink_inode_operations;
+static const struct inode_operations shmem_symlink_inline_operations;
 
 /*
  * Normally tmpfs makes no use of shmem_prepare_write, but it
@@ -1899,12 +1904,12 @@ static void shmem_put_link(struct dentry *dentry, struct nameidata *nd, void *co
 	}
 }
 
-static struct inode_operations shmem_symlink_inline_operations = {
+static const struct inode_operations shmem_symlink_inline_operations = {
 	.readlink	= generic_readlink,
 	.follow_link	= shmem_follow_link_inline,
 };
 
-static struct inode_operations shmem_symlink_inode_operations = {
+static const struct inode_operations shmem_symlink_inode_operations = {
 	.truncate	= shmem_truncate,
 	.readlink	= generic_readlink,
 	.follow_link	= shmem_follow_link,
@@ -2311,7 +2316,7 @@ static void destroy_inodecache(void)
 
 static const struct address_space_operations shmem_aops = {
 	.writepage	= shmem_writepage,
-	.set_page_dirty	= __set_page_dirty_nobuffers,
+	.set_page_dirty	= __set_page_dirty_no_writeback,
 #ifdef CONFIG_TMPFS
 	.prepare_write	= shmem_prepare_write,
 	.commit_write	= simple_commit_write,
@@ -2330,7 +2335,7 @@ static const struct file_operations shmem_file_operations = {
 #endif
 };
 
-static struct inode_operations shmem_inode_operations = {
+static const struct inode_operations shmem_inode_operations = {
 	.truncate	= shmem_truncate,
 	.setattr	= shmem_notify_change,
 	.truncate_range	= shmem_truncate_range,
@@ -2344,7 +2349,7 @@ static struct inode_operations shmem_inode_operations = {
 
 };
 
-static struct inode_operations shmem_dir_inode_operations = {
+static const struct inode_operations shmem_dir_inode_operations = {
 #ifdef CONFIG_TMPFS
 	.create		= shmem_create,
 	.lookup		= simple_lookup,
@@ -2366,7 +2371,7 @@ static struct inode_operations shmem_dir_inode_operations = {
 #endif
 };
 
-static struct inode_operations shmem_special_inode_operations = {
+static const struct inode_operations shmem_special_inode_operations = {
 #ifdef CONFIG_TMPFS_POSIX_ACL
 	.setattr	= shmem_notify_change,
 	.setxattr	= generic_setxattr,