diff options
| author |   Theodore Ts'o <tytso@mit.edu> | 2009-05-21 16:01:00 -0400 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2009-06-11 21:36:09 -0400 |
| commit | 9fd5746fd3d7838bf6ff991d50f1257057d1156f (patch) | |
| tree | e0afe14ea9415b0e54c40703bb44acfec100a4b3 /drivers/ieee1394/dv1394.c | |
| parent | ->write_super lock_super pushdown (diff) | |
| download | linux-dev-9fd5746fd3d7838bf6ff991d50f1257057d1156f.tar.xz linux-dev-9fd5746fd3d7838bf6ff991d50f1257057d1156f.zip | |
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 'drivers/ieee1394/dv1394.c')
| -rw-r--r-- | drivers/ieee1394/dv1394.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/ieee1394/dv1394.c b/drivers/ieee1394/dv1394.c index 823a6297a1af..2cd00b5b45b4 100644 --- a/drivers/ieee1394/dv1394.c +++ b/drivers/ieee1394/dv1394.c @@ -1789,12 +1789,13 @@ static int dv1394_open(struct inode *inode, struct file *file) } else { /* look up the card by ID */ unsigned long flags; + int idx = ieee1394_file_to_instance(file); spin_lock_irqsave(&dv1394_cards_lock, flags); if (!list_empty(&dv1394_cards)) { struct video_card *p; list_for_each_entry(p, &dv1394_cards, list) { - if ((p->id) == ieee1394_file_to_instance(file)) { + if ((p->id) == idx) { video = p; break; } @@ -1803,7 +1804,7 @@ static int dv1394_open(struct inode *inode, struct file *file) spin_unlock_irqrestore(&dv1394_cards_lock, flags); if (!video) { - debug_printk("dv1394: OHCI card %d not found", ieee1394_file_to_instance(file)); + debug_printk("dv1394: OHCI card %d not found", idx); return -ENODEV; } |