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Message-ID: <20130214161520.GC31269@quack.suse.cz> Date: Thu, 14 Feb 2013 17:15:20 +0100 From: Jan Kara <jack@...e.cz> To: Tim Gardner <tim.gardner@...onical.com> Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Jan Kara <jack@...e.cz>, linux-ext4@...r.kernel.org Subject: Re: [PATCH linux-next] jbd: start_this_handle(): remove kfree() redundant null check On Tue 12-02-13 11:23:24, Tim Gardner wrote: > smatch analysis: > > fs/jbd/transaction.c:236 start_this_handle() info: redundant null > check on new_transaction calling kfree() > > Cc: Andrew Morton <akpm@...ux-foundation.org> > Cc: Jan Kara <jack@...e.cz> > Cc: linux-ext4@...r.kernel.org > Signed-off-by: Tim Gardner <tim.gardner@...onical.com> > --- > fs/jbd/transaction.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c > index 071d690..ee40b4e 100644 > --- a/fs/jbd/transaction.c > +++ b/fs/jbd/transaction.c > @@ -232,8 +232,7 @@ repeat_locked: > > lock_map_acquire(&handle->h_lockdep_map); > out: > - if (unlikely(new_transaction)) /* It's usually NULL */ > - kfree(new_transaction); > + kfree(new_transaction); > return ret; Thanks for the patch but I actually think this is deliberate because new_transaction is usually NULL while kfree() is optimized for passed pointer to be usually != NULL. Also we save a function call in the common case. So I'm for the code to stay as is. Honza -- Jan Kara <jack@...e.cz> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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