[PATCH 6/10] allow xfs_args_allocate to fail

[Christoph Hellwig <hch@xxxxxx>]

Switch xfs_args_allocate to kzalloc and handle failures.


Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.c
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_super.c     2008-05-01 
20:06:01.000000000 +0200
+++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_super.c  2008-05-01 20:15:00.000000000 
+0200
@@ -75,7 +75,10 @@ xfs_args_allocate(
 {
        struct xfs_mount_args   *args;
 
-       args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
+       args = kzalloc(sizeof(struct xfs_mount_args), GFP_KERNEL);
+       if (!args)
+               return NULL;
+
        args->logbufs = args->logbufsize = -1;
        strncpy(args->fsname, sb->s_id, MAXNAMELEN);
 
@@ -1396,9 +1399,13 @@ xfs_fs_remount(
        char                    *options)
 {
        struct xfs_mount        *mp = XFS_M(sb);
-       struct xfs_mount_args   *args = xfs_args_allocate(sb, 0);
+       struct xfs_mount_args   *args;
        int                     error;
 
+       args = xfs_args_allocate(sb, 0);
+       if (!args)
+               return -ENOMEM;
+
        error = xfs_parseargs(mp, options, args, 1);
        if (error)
                goto out_free_args;
@@ -1420,7 +1427,7 @@ xfs_fs_remount(
        }
 
  out_free_args:
-       kmem_free(args, sizeof(*args));
+       kfree(args);
        return -error;
 }
 
@@ -1725,9 +1732,13 @@ xfs_fs_fill_super(
 {
        struct inode            *root;
        struct xfs_mount        *mp = NULL;
-       struct xfs_mount_args   *args = xfs_args_allocate(sb, silent);
+       struct xfs_mount_args   *args;
        int                     flags = 0, error;
 
+       args = xfs_args_allocate(sb, silent);
+       if (!args)
+               return -ENOMEM;
+
        mp = xfs_mount_init();
 
        INIT_LIST_HEAD(&mp->m_sync_list);
@@ -1827,7 +1838,7 @@ xfs_fs_fill_super(
 
        xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
 
-       kmem_free(args, sizeof(*args));
+       kfree(args);
        return 0;
 
  error2:
@@ -1875,7 +1886,7 @@ xfs_fs_fill_super(
        kmem_free(mp, sizeof(xfs_mount_t));
 
  fail_vfsop:
-       kmem_free(args, sizeof(*args));
+       kfree(args);
        return -error;
 }