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>
diff --git a/drivers/ieee1394/dv1394.c b/drivers/ieee1394/dv1394.c
index 823a629..2cd00b5 100644
--- a/drivers/ieee1394/dv1394.c
+++ b/drivers/ieee1394/dv1394.c
@@ -1789,12 +1789,13 @@
} 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 @@
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;
}