linux-kernel - Re: [PATCH] Deadstore detected by Lukas Bulwahn's CodeChecker Tool (ELISA group)

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Date:   Wed, 12 May 2021 11:38:33 +0200
From:   Aurélien Aptel <aaptel@...e.com>
To:     wenhuizhang <wenhui@...ail.gwu.edu>
Cc:     wenhuizhang <wenhui@...ail.gwu.edu>,
        Steve French <sfrench@...ba.org>, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Deadstore detected by Lukas Bulwahn's CodeChecker Tool
 (ELISA group)

wenhuizhang <wenhui@...ail.gwu.edu> writes:
> Deadstore detected by Lukas Bulwahn's CodeChecker Tool (ELISA group).
>
> line 741 struct cifsInodeInfo *cinode;
> line 747 cinode = CIFS_I(d_inode(cfile->dentry));
> could be deleted.
>
> cinode on filesystem should not be deleted when files are closed, they are representations of some data fields on a physical disk, thus no further action is required.
> The virtual inode on vfs will be handled by vfs automatically, and the denotation is inode, which is different from the cinode.
>
> Signed-off-by: wenhuizhang <wenhui@...ail.gwu.edu>

That's better but:
* the subject (first line of commit msg) should be about what the patch
  actually does, usally with a prefix of the subsystem. So for example:
  cifs: remove deadstore in cifs_close_all_deferred_files()
* the body of the commit msg should be wrapped around 80 cols to avoid
  long lines unless you are quoting some output or urls

Cheers,
-- 
Aurélien Aptel / SUSE Labs Samba Team
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