From mboxrd@z Thu Jan  1 00:00:00 1970
From: gaoxiang25@huawei.com (Gao Xiang)
Date: Wed, 14 Aug 2019 10:24:42 +0800
Subject: [PATCH] staging: erofs: removing an extra call to iloc() in
 fill_inode()
In-Reply-To: <418907b6-0b6b-3b08-c6fd-939a206f061f@huawei.com>
References: <20190813203840.13782-1-pratikshinde320@gmail.com>
 <20190814015944.GA11254@138>
 <418907b6-0b6b-3b08-c6fd-939a206f061f@huawei.com>
Message-ID: <20190814022442.GA28602@138>

On Wed, Aug 14, 2019@09:56:09AM +0800, Chao Yu wrote:
> On 2019/8/14 9:59, Gao Xiang wrote:
> > Hi Pratik,
> > 
> > On Wed, Aug 14, 2019@02:08:40AM +0530, Pratik Shinde wrote:
> >> in fill_inode() we call iloc() twice.Avoiding the extra call by
> >> storing the result.
> >>
> >> Signed-off-by: Pratik Shinde <pratikshinde320 at gmail.com>
> > 
> > I have no objection of this patch, but I'd like to
> > hear Chao/Greg's idea about this...
> 
> It looks more clean. :)
> 
> Nitpick, maybe change 'inode_loc' to shorter 'iloc' will be better.

iloc is the name of static inline helper function in internal.h
used for shorter lines...

Thanks,
Gao Xiang

> 
> Reviewed-by: Chao Yu <yuchao0 at huawei.com>
> 
> Thanks,
> 
> > 
> > Thanks,
> > Gao Xiang
> > 
> >> ---
> >>  drivers/staging/erofs/inode.c | 7 ++++---
> >>  1 file changed, 4 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
> >> index 4c3d8bf..d82ba6c 100644
> >> --- a/drivers/staging/erofs/inode.c
> >> +++ b/drivers/staging/erofs/inode.c
> >> @@ -167,11 +167,12 @@ static int fill_inode(struct inode *inode, int isdir)
> >>  	int err;
> >>  	erofs_blk_t blkaddr;
> >>  	unsigned int ofs;
> >> +	erofs_off_t inode_loc;
> >>  
> >>  	trace_erofs_fill_inode(inode, isdir);
> >> -
> >> -	blkaddr = erofs_blknr(iloc(sbi, vi->nid));
> >> -	ofs = erofs_blkoff(iloc(sbi, vi->nid));
> >> +	inode_loc = iloc(sbi, vi->nid);
> >> +	blkaddr = erofs_blknr(inode_loc);
> >> +	ofs = erofs_blkoff(inode_loc);
> >>  
> >>  	debugln("%s, reading inode nid %llu at %u of blkaddr %u",
> >>  		__func__, vi->nid, ofs, blkaddr);
> >> -- 
> >> 2.9.3
> >>
> > .
> >