linux-kernel - RE: [PATCH -v2] x86: Add an archinfo dumper module

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Date:	Fri, 5 Feb 2016 22:24:05 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	"Luck, Tony" <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>
CC:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	Andy Lutomirski <luto@...capital.net>,
	"Peter Zijlstra" <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Brian Gerst" <brgerst@...il.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH -v2] x86: Add an archinfo dumper module

+	show_reg_bits(m, "CR4", cr4_format, cr4);
 
Can %pXX formats use more than one argument?  If so, we might be able to move
all my code to lib/vsprintf.c and just write:

	seq_printf(m, "CR4: %pBITS: 0x%lx\n", cr4_format, cr4, cr4);

If they can't, we could bundle the format and value into a structure:

struct printbits {
	char *fmt;
	u64 val;
};

{
	struct printbits p;

	p.fmt = cr4_format;
	p.val = __read_cr4();
	seq_printf(m, "CR4: %pBITS: 0x%lx\n", &p, p.val);
}

-Tony