The patch titled
fs: inode.c use atomic_inc_return in __iget
has been added to the -mm tree. Its filename is
fs-inodec-use-atomic_inc_return-in-__iget.patch
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------------------------------------------------------
Subject: fs: inode.c use atomic_inc_return in __iget
From: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
Using atomic_inc_return in __iget(struct inode *inode) makes the intent of
this code clearer and generates less code on processors that have this
operation.
On x86_64 this patch reduces the text size of inode.o by 12 bytes.
Signed-off-by: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/inode.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff -puN fs/inode.c~fs-inodec-use-atomic_inc_return-in-__iget fs/inode.c
--- a/fs/inode.c~fs-inodec-use-atomic_inc_return-in-__iget
+++ a/fs/inode.c
@@ -286,11 +286,9 @@ static void init_once(void *foo)
*/
void __iget(struct inode *inode)
{
- if (atomic_read(&inode->i_count)) {
- atomic_inc(&inode->i_count);
+ if (atomic_inc_return(&inode->i_count) != 1)
return;
- }
- atomic_inc(&inode->i_count);
+
if (!(inode->i_state & (I_DIRTY|I_SYNC)))
list_move(&inode->i_list, &inode_in_use);
inodes_stat.nr_unused--;
_
Patches currently in -mm which might be from richard@xxxxxxxxxxxxxxx are
linux-next.patch
buffer_head-remove-redundant-test-from-wait_on_buffer.patch
buffer_head-remove-redundant-test-from-wait_on_buffer-fix.patch
wait_on_buffer-remove-the-buffer_locked-test.patch
fs-writeback-check-sync-bit-earlier-in-inode_wait_for_writeback.patch
fs-inodec-use-atomic_inc_return-in-__iget.patch
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