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authorTheodore Ts'o <tytso@mit.edu>2009-05-21 16:01:00 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2009-06-11 21:36:09 -0400
commit9fd5746fd3d7838bf6ff991d50f1257057d1156f (patch)
treee0afe14ea9415b0e54c40703bb44acfec100a4b3 /include
parentebc1ac164560a241d9bf1b7519062910c3f90a01 (diff)
fs: Remove i_cindex from struct inode
The only user of the i_cindex element in the inode structure is used is by the firewire drivers. As part of an attempt to slim down the inode structure to save memory --- since a typical Linux system will have hundreds of thousands if not millions of inodes cached, a reduction in the size inode has high leverage. The firewire driver does not need i_cindex in any fast path, so it's simple enough to calculate when it is needed, instead of wasting space in the inode structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: krh@redhat.com Cc: stefanr@s5r6.in-berlin.de Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/cdev.h2
-rw-r--r--include/linux/fs.h1
2 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/cdev.h b/include/linux/cdev.h
index fb4591977b03..f389e319a454 100644
--- a/include/linux/cdev.h
+++ b/include/linux/cdev.h
@@ -28,6 +28,8 @@ int cdev_add(struct cdev *, dev_t, unsigned);
28 28
29void cdev_del(struct cdev *); 29void cdev_del(struct cdev *);
30 30
31int cdev_index(struct inode *inode);
32
31void cd_forget(struct inode *); 33void cd_forget(struct inode *);
32 34
33extern struct backing_dev_info directly_mappable_cdev_bdi; 35extern struct backing_dev_info directly_mappable_cdev_bdi;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e7833ef5d1d6..bcd63706db87 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -751,7 +751,6 @@ struct inode {
751 struct block_device *i_bdev; 751 struct block_device *i_bdev;
752 struct cdev *i_cdev; 752 struct cdev *i_cdev;
753 }; 753 };
754 int i_cindex;
755 754
756 __u32 i_generation; 755 __u32 i_generation;
757 756