2.6.33.3-rt16 compile failure in fs/ecryptfs/inode.o

2.6.33.3-rt16 compile failure in fs/ecryptfs/inode.o

[John Kacur]

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make O=/bld/2.6.33.3-rt16/ fs/ecryptfs/inode.o
  Using /home/jkacur/jk-2.6 as source for kernel
  GEN     /bld/2.6.33.3-rt16/Makefile
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    /home/jkacur/jk-2.6/scripts/checksyscalls.sh
  CC [M]  fs/ecryptfs/inode.o
/home/jkacur/jk-2.6/fs/ecryptfs/inode.c: In function 
‘ecryptfs_lookup_and_interpose_lower’:
/home/jkacur/jk-2.6/fs/ecryptfs/inode.c:266: error: wrong type argument to 
unary exclamation mark
make[2]: *** [fs/ecryptfs/inode.o] Error 1
make[1]: *** [fs/ecryptfs/inode.o] Error 2
make: *** [sub-make] Error 2

The above comes from: 
commit 5c0eb5cec064ce26ffcd0cdd684c9b6dd7c9074e
Author: Nick Piggin <npiggin@suse.de>
Date:   Fri Jan 29 15:38:21 2010 -0800

    fs-dcache-scale-d_count

Re: 2.6.33.3-rt16 compile failure in fs/ecryptfs/inode.o

[Thomas Gleixner]

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On Tue, 27 Apr 2010, John Kacur wrote:
> make O=/bld/2.6.33.3-rt16/ fs/ecryptfs/inode.o
>   Using /home/jkacur/jk-2.6 as source for kernel
>   GEN     /bld/2.6.33.3-rt16/Makefile
>   CHK     include/linux/version.h
>   CHK     include/generated/utsrelease.h
>   CALL    /home/jkacur/jk-2.6/scripts/checksyscalls.sh
>   CC [M]  fs/ecryptfs/inode.o
> /home/jkacur/jk-2.6/fs/ecryptfs/inode.c: In function 
> ‘ecryptfs_lookup_and_interpose_lower’:
> /home/jkacur/jk-2.6/fs/ecryptfs/inode.c:266: error: wrong type argument to 
> unary exclamation mark
> make[2]: *** [fs/ecryptfs/inode.o] Error 1
> make[1]: *** [fs/ecryptfs/inode.o] Error 2
> make: *** [sub-make] Error 2
> 
> The above comes from: 
> commit 5c0eb5cec064ce26ffcd0cdd684c9b6dd7c9074e
> Author: Nick Piggin <npiggin@suse.de>
> Date:   Fri Jan 29 15:38:21 2010 -0800

Half the truth :) It got not fixed up in a later patch which made
d_count atomic_t again. Fix below.

Thanks,

	tglx
---
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 2fb8fd1..23dc2af 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -263,7 +263,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
 				   ecryptfs_dentry->d_parent));
 	lower_inode = lower_dentry->d_inode;
 	fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode);
-	BUG_ON(!lower_dentry->d_count);
+	BUG_ON(!atomic_read(&lower_dentry->d_count));
 	ecryptfs_set_dentry_private(ecryptfs_dentry,
 				    kmem_cache_alloc(ecryptfs_dentry_info_cache,
 						     GFP_KERNEL));