linux-kernel - Re: [EXT4 set 3][PATCH 1/1] ext4 nanosecond timestamp

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Message-Id: <1184699323.3820.3.camel@localhost.localdomain>
Date:	Tue, 17 Jul 2007 12:08:43 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Kalpak Shah <kalpak@...sterfs.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [EXT4 set 3][PATCH 1/1] ext4 nanosecond timestamp

On Tue, 2007-07-17 at 15:29 +0530, Kalpak Shah wrote:
> On Mon, 2007-07-16 at 17:49 -0700, Mingming Cao wrote:
> > On Tue, 2007-07-10 at 16:30 -0700, Andrew Morton wrote:
> > > On Sun, 01 Jul 2007 03:36:56 -0400
> > > Mingming Cao <cmm@...ibm.com> wrote:
> > > > +static inline __le32 ext4_encode_extra_time(struct timespec *time)
> > > > +{
> > > > +       return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
> > > > +			   time->tv_sec >> 32 : 0) |
> > > > +			   ((time->tv_nsec << 2) & EXT4_NSEC_MASK));
> > > > +}
> > > > +
> > > > +static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
> > > > +{
> > > > +       if (sizeof(time->tv_sec) > 4)
> > > > +	       time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
> > > > +			       << 32;
> > > > +       time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2;
> > > > +}
> > > 
> > > Consider uninlining these functions.
> > > 
> > I got compile warining after apply Kalpal's update nanosecond patch,
> > which makes these two function inline. It complains these functions are
> > defined but not used. It's being used only in the following
> > micros(EXT4_INODE_SET_XTIME etc).  So if the .c file included the
> > ext4_fs.h but not using the micros, the compile will think these two
> > functions are not used.
> 
> The compile warnings were introduced because the functions were
> uninlined. So we can either keep these functions inlined or consider
> adding a "__used" attribute to these two functions. 
> 
okay for now I keep these functions inlined. 

> Thanks,
> Kalpak.
> 

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