Re: [PATCH 11/25] Unionfs: add un/likely conditionals on debug ops

roel
2007-09-26T21:34:44Z

Erez Zadok wrote:
> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
> ---
> fs/unionfs/debug.c | 108 +++++++++++++++++++++++++++------------------------
> 1 files changed, 57 insertions(+), 51 deletions(-)
>
> diff --git a/fs/unionfs/debug.c b/fs/unionfs/debug.c
> index 9546a41..09b52ce 100644
> --- a/fs/unionfs/debug.c
> +++ b/fs/unionfs/debug.c
> @@ -56,19 +56,19 @@ void __unionfs_check_inode(const struct inode *inode,
> sb = inode->i_sb;
> istart = ibstart(inode);
> iend = ibend(inode);
> - if (istart > iend) {
> + if (unlikely(istart > iend)) {
> PRINT_CALLER(fname, fxn, line);
> printk(" Ci0: inode=%p istart/end=%d:%d\n",
> inode, istart, iend);
> }
> - if ((istart == -1 && iend != -1) ||
> - (istart != -1 && iend == -1)) {
> + if (unlikely((istart == -1 && iend != -1) ||
> + (istart != -1 && iend == -1))) {

you could also do
if (unlikely((istart == -1 || iend == -1) && istart != iend)) {

[...]

> @@ -138,8 +139,8 @@ void __unionfs_check_dentry(const struct dentry *dentry,
> dend = dbend(dentry);
> BUG_ON(dstart > dend);
>
> - if ((dstart == -1 && dend != -1) ||
> - (dstart != -1 && dend == -1)) {
> + if (unlikely((dstart == -1 && dend != -1) ||
> + (dstart != -1 && dend == -1))) {

[...]

the same here

> @@ -223,30 +224,30 @@ void __unionfs_check_dentry(const struct dentry *dentry,
> istart = ibstart(inode);
> iend = ibend(inode);
> BUG_ON(istart > iend);
> - if ((istart == -1 && iend != -1) ||
> - (istart != -1 && iend == -1)) {
> + if (unlikely((istart == -1 && iend != -1) ||
> + (istart != -1 && iend == -1))) {

and here

[...]

> @@ -350,30 +354,30 @@ void __unionfs_check_file(const struct file *file,
> fend = fbend(file);
> BUG_ON(fstart > fend);
>
> - if ((fstart == -1 && fend != -1) ||
> - (fstart != -1 && fend == -1)) {
> + if (unlikely((fstart == -1 && fend != -1) ||
> + (fstart != -1 && fend == -1))) {

and here …