Re: [PATCH fs/proc/bootconfig] remove redundant comments from /proc/bootconfig

[Paul E. McKenney]

On Thu, Apr 04, 2024 at 08:55:22AM +0900, Masami Hiramatsu wrote:
> On Wed, 3 Apr 2024 12:16:28 -0700
> "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote:
> 
> > commit 717c7c894d4b ("fs/proc: Add boot loader arguments as comment to
> > /proc/bootconfig") adds bootloader argument comments into /proc/bootconfig.
> > 
> > /proc/bootconfig shows boot_command_line[] multiple times following
> > every xbc key value pair, that's duplicated and not necessary.
> > Remove redundant ones.
> > 
> > Output before and after the fix is like:
> > key1 = value1
> > *bootloader argument comments*
> > key2 = value2
> > *bootloader argument comments*
> > key3 = value3
> > *bootloader argument comments*
> > ...
> > 
> > key1 = value1
> > key2 = value2
> > key3 = value3
> > *bootloader argument comments*
> > ...
> > 
> > Fixes: 717c7c894d4b ("fs/proc: Add boot loader arguments as comment to /proc/bootconfig")
> > Signed-off-by: Zhenhua Huang <quic_zhenhuah@xxxxxxxxxxx>
> > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> > Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> > Cc: <linux-trace-kernel@xxxxxxxxxxxxxxx>
> > Cc: <linux-fsdevel@xxxxxxxxxxxxxxx>
> 
> OOps, good catch! Let me pick it.
> 
> Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

Thank you, and I have applied your ack and pulled this into its own
bootconfig.2024.04.04a.

My guess is that you will push this via your own tree, and so I will
drop my copy as soon as yours hits -next.

							Thanx, Paul

> Thank you!
> 
> > 
> > diff --git a/fs/proc/bootconfig.c b/fs/proc/bootconfig.c
> > index 902b326e1e560..e5635a6b127b0 100644
> > --- a/fs/proc/bootconfig.c
> > +++ b/fs/proc/bootconfig.c
> > @@ -62,12 +62,12 @@ static int __init copy_xbc_key_value_list(char *dst, size_t size)
> >  				break;
> >  			dst += ret;
> >  		}
> > -		if (ret >= 0 && boot_command_line[0]) {
> > -			ret = snprintf(dst, rest(dst, end), "# Parameters from bootloader:\n# %s\n",
> > -				       boot_command_line);
> > -			if (ret > 0)
> > -				dst += ret;
> > -		}
> > +	}
> > +	if (ret >= 0 && boot_command_line[0]) {
> > +		ret = snprintf(dst, rest(dst, end), "# Parameters from bootloader:\n# %s\n",
> > +			       boot_command_line);
> > +		if (ret > 0)
> > +			dst += ret;
> >  	}
> >  out:
> >  	kfree(key);
> 
> 
> -- 
> Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>