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Date:   Fri, 28 Dec 2018 17:51:13 +0100
Message-ID: <20181228175113.Horde.5ZUOOQLIT5SWwDlYCZQjrw1@messagerie.si.c-s.fr>
From:   LEROY Christophe <christophe.leroy@c-s.fr>
To:     Finn Thain <fthain@telegraphics.com.au>
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        linux-m68k@lists.linux-m68k.org,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v8 02/25] m68k/atari: Move Atari-specific code out of
 drivers/char/nvram.c
References: <cover.1545784679.git.fthain@telegraphics.com.au>
 <5a285a9d9aecc1ee748f62e41870111e7e0f4cff.1545784679.git.fthain@telegraphics.com.au>
In-Reply-To: <5a285a9d9aecc1ee748f62e41870111e7e0f4cff.1545784679.git.fthain@telegraphics.com.au>
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Finn Thain <fthain@telegraphics.com.au> a écrit :

> Move the m68k-specific code out of the driver to make the driver generic.
>
> I've used 'SPDX-License-Identifier: GPL-2.0+' for the new file because the
> old file is covered by MODULE_LICENSE("GPL").
>
> Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
> Tested-by: Christian T. Steigies <cts@debian.org>
> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
> ---
> Changed since v7:
>  - Added SPDX-License-Identifier.
> ---
>  arch/m68k/atari/Makefile |   2 +
>  arch/m68k/atari/nvram.c  | 243 +++++++++++++++++++++++++++++++++
>  drivers/char/nvram.c     | 280 +++++----------------------------------
>  3 files changed, 280 insertions(+), 245 deletions(-)
>  create mode 100644 arch/m68k/atari/nvram.c
>
> diff --git a/arch/m68k/atari/Makefile b/arch/m68k/atari/Makefile
> index 0cac723306f9..0b86bb6cfa87 100644
> --- a/arch/m68k/atari/Makefile
> +++ b/arch/m68k/atari/Makefile
> @@ -6,3 +6,5 @@ obj-y		:= config.o time.o debug.o ataints.o stdma.o \
>  			atasound.o stram.o
>
>  obj-$(CONFIG_ATARI_KBD_CORE)	+= atakeyb.o
> +
> +obj-$(CONFIG_NVRAM:m=y)		+= nvram.o
> diff --git a/arch/m68k/atari/nvram.c b/arch/m68k/atari/nvram.c
> new file mode 100644
> index 000000000000..3e620ee955ba
> --- /dev/null
> +++ b/arch/m68k/atari/nvram.c
> @@ -0,0 +1,243 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * CMOS/NV-RAM driver for Atari. Adapted from drivers/char/nvram.c.
> + * Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
> + * idea by and with help from Richard Jelinek <rj@suse.de>
> + * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
> + * Further contributions from Cesar Barros, Erik Gilling, Tim Hockin and
> + * Wim Van Sebroeck.
> + */
> +
> +#include <linux/errno.h>
> +#include <linux/init.h>
> +#include <linux/mc146818rtc.h>
> +#include <linux/module.h>
> +#include <linux/nvram.h>
> +#include <linux/proc_fs.h>
> +#include <linux/seq_file.h>
> +#include <linux/spinlock.h>
> +#include <linux/types.h>
> +#include <asm/atarihw.h>
> +#include <asm/atariints.h>
> +
> +#define NVRAM_BYTES		50
> +
> +/* It is worth noting that these functions all access bytes of general
> + * purpose memory in the NVRAM - that is to say, they all add the
> + * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
> + * know about the RTC cruft.
> + */
> +
> +/* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
> + * rtc_lock held. Due to the index-port/data-port design of the RTC, we
> + * don't want two different things trying to get to it at once. (e.g. the
> + * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
> + */
> +
> +unsigned char __nvram_read_byte(int i)
> +{
> +	return CMOS_READ(NVRAM_FIRST_BYTE + i);
> +}
> +
> +unsigned char nvram_read_byte(int i)
> +{
> +	unsigned long flags;
> +	unsigned char c;
> +
> +	spin_lock_irqsave(&rtc_lock, flags);
> +	c = __nvram_read_byte(i);
> +	spin_unlock_irqrestore(&rtc_lock, flags);
> +	return c;
> +}
> +EXPORT_SYMBOL(nvram_read_byte);
> +
> +/* This races nicely with trying to read with checksum checking */
> +void __nvram_write_byte(unsigned char c, int i)
> +{
> +	CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
> +}
> +
> +void nvram_write_byte(unsigned char c, int i)
> +{
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&rtc_lock, flags);
> +	__nvram_write_byte(c, i);
> +	spin_unlock_irqrestore(&rtc_lock, flags);
> +}
> +
> +/* On Ataris, the checksum is over all bytes except the checksum bytes
> + * themselves; these are at the very end.
> + */
> +#define ATARI_CKS_RANGE_START	0
> +#define ATARI_CKS_RANGE_END	47
> +#define ATARI_CKS_LOC		48
> +
> +int __nvram_check_checksum(void)
> +{
> +	int i;
> +	unsigned char sum = 0;
> +
> +	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
> +		sum += __nvram_read_byte(i);
> +	return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) &&
> +	       (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
> +}
> +
> +int nvram_check_checksum(void)
> +{
> +	unsigned long flags;
> +	int rv;
> +
> +	spin_lock_irqsave(&rtc_lock, flags);
> +	rv = __nvram_check_checksum();
> +	spin_unlock_irqrestore(&rtc_lock, flags);
> +	return rv;
> +}
> +EXPORT_SYMBOL(nvram_check_checksum);
> +
> +static void __nvram_set_checksum(void)
> +{
> +	int i;
> +	unsigned char sum = 0;
> +
> +	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
> +		sum += __nvram_read_byte(i);
> +	__nvram_write_byte(~sum, ATARI_CKS_LOC);
> +	__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
> +}
> +
> +#ifdef CONFIG_PROC_FS
> +static struct {
> +	unsigned char val;
> +	const char *name;
> +} boot_prefs[] = {
> +	{ 0x80, "TOS" },
> +	{ 0x40, "ASV" },
> +	{ 0x20, "NetBSD (?)" },
> +	{ 0x10, "Linux" },
> +	{ 0x00, "unspecified" },
> +};
> +
> +static const char * const languages[] = {
> +	"English (US)",
> +	"German",
> +	"French",
> +	"English (UK)",
> +	"Spanish",
> +	"Italian",
> +	"6 (undefined)",
> +	"Swiss (French)",
> +	"Swiss (German)",
> +};
> +
> +static const char * const dateformat[] = {
> +	"MM%cDD%cYY",
> +	"DD%cMM%cYY",
> +	"YY%cMM%cDD",
> +	"YY%cDD%cMM",
> +	"4 (undefined)",
> +	"5 (undefined)",
> +	"6 (undefined)",
> +	"7 (undefined)",
> +};
> +
> +static const char * const colors[] = {
> +	"2", "4", "16", "256", "65536", "??", "??", "??"
> +};
> +
> +static void atari_nvram_proc_read(unsigned char *nvram, struct  
> seq_file *seq,
> +				  void *offset)
> +{
> +	int checksum;
> +	int i;
> +	unsigned int vmode;
> +
> +	spin_lock_irq(&rtc_lock);
> +	checksum = __nvram_check_checksum();
> +	spin_unlock_irq(&rtc_lock);
> +
> +	seq_printf(seq, "Checksum status  : %svalid\n", checksum ? "" : "not ");
> +
> +	seq_puts(seq, "Boot preference  : ");
> +	for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i)
> +		if (nvram[1] == boot_prefs[i].val) {
> +			seq_printf(seq, "%s\n", boot_prefs[i].name);
> +			break;
> +		}
> +	if (i < 0)
> +		seq_printf(seq, "0x%02x (undefined)\n", nvram[1]);
> +
> +	seq_printf(seq, "SCSI arbitration : %s\n",
> +		   (nvram[16] & 0x80) ? "on" : "off");
> +	seq_puts(seq, "SCSI host ID     : ");
> +	if (nvram[16] & 0x80)
> +		seq_printf(seq, "%d\n", nvram[16] & 7);
> +	else
> +		seq_puts(seq, "n/a\n");
> +
> +	if (!MACH_IS_FALCON)
> +		return;
> +
> +	seq_puts(seq, "OS language      : ");
> +	if (nvram[6] < ARRAY_SIZE(languages))
> +		seq_printf(seq, "%s\n", languages[nvram[6]]);
> +	else
> +		seq_printf(seq, "%u (undefined)\n", nvram[6]);
> +	seq_puts(seq, "Keyboard language: ");
> +	if (nvram[7] < ARRAY_SIZE(languages))
> +		seq_printf(seq, "%s\n", languages[nvram[7]]);
> +	else
> +		seq_printf(seq, "%u (undefined)\n", nvram[7]);
> +	seq_puts(seq, "Date format      : ");
> +	seq_printf(seq, dateformat[nvram[8] & 7],
> +		   nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
> +	seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12);
> +	seq_puts(seq, "Boot delay       : ");
> +	if (nvram[10] == 0)
> +		seq_puts(seq, "default");
> +	else
> +		seq_printf(seq, "%ds%s\n", nvram[10],
> +			   nvram[10] < 8 ? ", no memory test" : "");
> +
> +	vmode = (nvram[14] << 8) | nvram[15];
> +	seq_printf(seq,
> +		   "Video mode       : %s colors, %d columns, %s %s monitor\n",
> +		   colors[vmode & 7], vmode & 8 ? 80 : 40,
> +		   vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
> +	seq_printf(seq,
> +		   "                   %soverscan, compat. mode %s%s\n",
> +		   vmode & 64 ? "" : "no ", vmode & 128 ? "on" : "off",
> +		   vmode & 256 ?
> +		   (vmode & 16 ? ", line doubling" : ", half screen") : "");
> +}
> +
> +static int nvram_proc_read(struct seq_file *seq, void *offset)
> +{
> +	unsigned char contents[NVRAM_BYTES];
> +	int i;
> +
> +	spin_lock_irq(&rtc_lock);
> +	for (i = 0; i < NVRAM_BYTES; ++i)
> +		contents[i] = __nvram_read_byte(i);
> +	spin_unlock_irq(&rtc_lock);
> +
> +	atari_nvram_proc_read(contents, seq, offset);
> +
> +	return 0;
> +}
> +
> +static int __init atari_nvram_init(void)
> +{
> +	if (!(MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK)))
> +		return -ENODEV;
> +
> +	if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) {
> +		pr_err("nvram: can't create /proc/driver/nvram\n");
> +		return -ENOMEM;
> +	}
> +
> +	return 0;
> +}
> +device_initcall(atari_nvram_init);
> +#endif /* CONFIG_PROC_FS */
> diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
> index 25264d65e716..a9d4652f9e90 100644
> --- a/drivers/char/nvram.c
> +++ b/drivers/char/nvram.c
> @@ -21,13 +21,6 @@
>   * ioctl(NVRAM_SETCKS) (doesn't change contents, just makes checksum valid
>   * again; use with care!)
>   *
> - * This file also provides some functions for other parts of the kernel that
> - * want to access the NVRAM: nvram_{read,write,check_checksum,set_checksum}.
> - * Obviously this can be used only if this driver is always configured into
> - * the kernel and is not a module. Since the functions are used by  
> some Atari
> - * drivers, this is the case on the Atari.
> - *
> - *
>   * 	1.1	Cesar Barros: SMP locking fixes
>   * 		added changelog
>   * 	1.2	Erik Gilling: Cobalt Networks support
> @@ -39,64 +32,6 @@
>
>  #include <linux/module.h>
>  #include <linux/nvram.h>
> -
> -#define PC		1
> -#define ATARI		2
> -
> -/* select machine configuration */
> -#if defined(CONFIG_ATARI)
> -#  define MACH ATARI
> -#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__)   
> /* and ?? */
> -#  define MACH PC
> -#else
> -#  error Cannot build nvram driver for this machine configuration.
> -#endif
> -
> -#if MACH == PC
> -
> -/* RTC in a PC */
> -#define CHECK_DRIVER_INIT()	1
> -
> -/* On PCs, the checksum is built only over bytes 2..31 */
> -#define PC_CKS_RANGE_START	2
> -#define PC_CKS_RANGE_END	31
> -#define PC_CKS_LOC		32
> -#define NVRAM_BYTES		(128-NVRAM_FIRST_BYTE)
> -
> -#define mach_check_checksum	pc_check_checksum
> -#define mach_set_checksum	pc_set_checksum
> -#define mach_proc_infos		pc_proc_infos
> -
> -#endif
> -
> -#if MACH == ATARI
> -
> -/* Special parameters for RTC in Atari machines */
> -#include <asm/atarihw.h>
> -#include <asm/atariints.h>
> -#define RTC_PORT(x)		(TT_RTC_BAS + 2*(x))
> -#define CHECK_DRIVER_INIT()	(MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
> -
> -#define NVRAM_BYTES		50
> -
> -/* On Ataris, the checksum is over all bytes except the checksum bytes
> - * themselves; these are at the very end */
> -#define ATARI_CKS_RANGE_START	0
> -#define ATARI_CKS_RANGE_END	47
> -#define ATARI_CKS_LOC		48
> -
> -#define mach_check_checksum	atari_check_checksum
> -#define mach_set_checksum	atari_set_checksum
> -#define mach_proc_infos		atari_proc_infos
> -
> -#endif
> -
> -/* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
> - * rtc_lock held. Due to the index-port/data-port design of the RTC, we
> - * don't want two different things trying to get to it at once. (e.g. the
> - * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
> - */
> -
>  #include <linux/types.h>
>  #include <linux/errno.h>
>  #include <linux/miscdevice.h>
> @@ -120,12 +55,9 @@ static int nvram_open_mode;	/* special open modes */
>  #define NVRAM_WRITE		1 /* opened for writing (exclusive) */
>  #define NVRAM_EXCL		2 /* opened with O_EXCL */
>
> -static int mach_check_checksum(void);
> -static void mach_set_checksum(void);
> -
>  #ifdef CONFIG_PROC_FS
> -static void mach_proc_infos(unsigned char *contents, struct seq_file *seq,
> -								void *offset);
> +static void pc_nvram_proc_read(unsigned char *contents, struct  
> seq_file *seq,
> +			       void *offset);
>  #endif
>
>  /*
> @@ -139,6 +71,14 @@ static void mach_proc_infos(unsigned char  
> *contents, struct seq_file *seq,
>   * know about the RTC cruft.
>   */
>
> +#define NVRAM_BYTES		(128 - NVRAM_FIRST_BYTE)
> +
> +/* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
> + * rtc_lock held. Due to the index-port/data-port design of the RTC, we
> + * don't want two different things trying to get to it at once. (e.g. the
> + * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
> + */
> +
>  unsigned char __nvram_read_byte(int i)
>  {
>  	return CMOS_READ(NVRAM_FIRST_BYTE + i);
> @@ -174,9 +114,22 @@ void nvram_write_byte(unsigned char c, int i)
>  }
>  EXPORT_SYMBOL(nvram_write_byte);
>
> +/* On PCs, the checksum is built only over bytes 2..31 */
> +#define PC_CKS_RANGE_START	2
> +#define PC_CKS_RANGE_END	31
> +#define PC_CKS_LOC		32
> +
>  int __nvram_check_checksum(void)
>  {
> -	return mach_check_checksum();
> +	int i;
> +	unsigned short sum = 0;
> +	unsigned short expect;
> +
> +	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
> +		sum += __nvram_read_byte(i);
> +	expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
> +	    __nvram_read_byte(PC_CKS_LOC+1);
> +	return (sum & 0xffff) == expect;
>  }


I don't understand how this is part of the code move.
Does the pc specific checksum becomes the generic one ?

Christophe

>  EXPORT_SYMBOL(__nvram_check_checksum);
>
> @@ -194,7 +147,13 @@ EXPORT_SYMBOL(nvram_check_checksum);
>
>  static void __nvram_set_checksum(void)
>  {
> -	mach_set_checksum();
> +	int i;
> +	unsigned short sum = 0;
> +
> +	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
> +		sum += __nvram_read_byte(i);
> +	__nvram_write_byte(sum >> 8, PC_CKS_LOC);
> +	__nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
>  }
>
>  #if 0
> @@ -384,7 +343,7 @@ static int nvram_proc_read(struct seq_file *seq,  
> void *offset)
>  		contents[i] = __nvram_read_byte(i);
>  	spin_unlock_irq(&rtc_lock);
>
> -	mach_proc_infos(contents, seq, offset);
> +	pc_nvram_proc_read(contents, seq, offset);
>
>  	return 0;
>  }
> @@ -418,10 +377,6 @@ static int __init nvram_init(void)
>  {
>  	int ret;
>
> -	/* First test whether the driver should init at all */
> -	if (!CHECK_DRIVER_INIT())
> -		return -ENODEV;
> -
>  	ret = misc_register(&nvram_dev);
>  	if (ret) {
>  		printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
> @@ -451,36 +406,6 @@ static void __exit nvram_cleanup_module(void)
>  module_init(nvram_init);
>  module_exit(nvram_cleanup_module);
>
> -/*
> - * Machine specific functions
> - */
> -
> -#if MACH == PC
> -
> -static int pc_check_checksum(void)
> -{
> -	int i;
> -	unsigned short sum = 0;
> -	unsigned short expect;
> -
> -	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
> -		sum += __nvram_read_byte(i);
> -	expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
> -	    __nvram_read_byte(PC_CKS_LOC+1);
> -	return (sum & 0xffff) == expect;
> -}
> -
> -static void pc_set_checksum(void)
> -{
> -	int i;
> -	unsigned short sum = 0;
> -
> -	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
> -		sum += __nvram_read_byte(i);
> -	__nvram_write_byte(sum >> 8, PC_CKS_LOC);
> -	__nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
> -}
> -
>  #ifdef CONFIG_PROC_FS
>
>  static const char * const floppy_types[] = {
> @@ -495,8 +420,8 @@ static const char * const gfx_types[] = {
>  	"monochrome",
>  };
>
> -static void pc_proc_infos(unsigned char *nvram, struct seq_file *seq,
> -								void *offset)
> +static void pc_nvram_proc_read(unsigned char *nvram, struct seq_file *seq,
> +			       void *offset)
>  {
>  	int checksum;
>  	int type;
> @@ -557,143 +482,8 @@ static void pc_proc_infos(unsigned char  
> *nvram, struct seq_file *seq,
>
>  	return;
>  }
> -#endif
> -
> -#endif /* MACH == PC */
> -
> -#if MACH == ATARI
> -
> -static int atari_check_checksum(void)
> -{
> -	int i;
> -	unsigned char sum = 0;
> -
> -	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
> -		sum += __nvram_read_byte(i);
> -	return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) &&
> -	    (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
> -}
> -
> -static void atari_set_checksum(void)
> -{
> -	int i;
> -	unsigned char sum = 0;
> -
> -	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
> -		sum += __nvram_read_byte(i);
> -	__nvram_write_byte(~sum, ATARI_CKS_LOC);
> -	__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
> -}
> -
> -#ifdef CONFIG_PROC_FS
> -
> -static struct {
> -	unsigned char val;
> -	const char *name;
> -} boot_prefs[] = {
> -	{ 0x80, "TOS" },
> -	{ 0x40, "ASV" },
> -	{ 0x20, "NetBSD (?)" },
> -	{ 0x10, "Linux" },
> -	{ 0x00, "unspecified" }
> -};
> -
> -static const char * const languages[] = {
> -	"English (US)",
> -	"German",
> -	"French",
> -	"English (UK)",
> -	"Spanish",
> -	"Italian",
> -	"6 (undefined)",
> -	"Swiss (French)",
> -	"Swiss (German)"
> -};
> -
> -static const char * const dateformat[] = {
> -	"MM%cDD%cYY",
> -	"DD%cMM%cYY",
> -	"YY%cMM%cDD",
> -	"YY%cDD%cMM",
> -	"4 (undefined)",
> -	"5 (undefined)",
> -	"6 (undefined)",
> -	"7 (undefined)"
> -};
> -
> -static const char * const colors[] = {
> -	"2", "4", "16", "256", "65536", "??", "??", "??"
> -};
> -
> -static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq,
> -								void *offset)
> -{
> -	int checksum = nvram_check_checksum();
> -	int i;
> -	unsigned vmode;
> -
> -	seq_printf(seq, "Checksum status  : %svalid\n", checksum ? "" : "not ");
> -
> -	seq_printf(seq, "Boot preference  : ");
> -	for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i) {
> -		if (nvram[1] == boot_prefs[i].val) {
> -			seq_printf(seq, "%s\n", boot_prefs[i].name);
> -			break;
> -		}
> -	}
> -	if (i < 0)
> -		seq_printf(seq, "0x%02x (undefined)\n", nvram[1]);
> -
> -	seq_printf(seq, "SCSI arbitration : %s\n",
> -	    (nvram[16] & 0x80) ? "on" : "off");
> -	seq_printf(seq, "SCSI host ID     : ");
> -	if (nvram[16] & 0x80)
> -		seq_printf(seq, "%d\n", nvram[16] & 7);
> -	else
> -		seq_printf(seq, "n/a\n");
> -
> -	/* the following entries are defined only for the Falcon */
> -	if ((atari_mch_cookie >> 16) != ATARI_MCH_FALCON)
> -		return;
> -
> -	seq_printf(seq, "OS language      : ");
> -	if (nvram[6] < ARRAY_SIZE(languages))
> -		seq_printf(seq, "%s\n", languages[nvram[6]]);
> -	else
> -		seq_printf(seq, "%u (undefined)\n", nvram[6]);
> -	seq_printf(seq, "Keyboard language: ");
> -	if (nvram[7] < ARRAY_SIZE(languages))
> -		seq_printf(seq, "%s\n", languages[nvram[7]]);
> -	else
> -		seq_printf(seq, "%u (undefined)\n", nvram[7]);
> -	seq_printf(seq, "Date format      : ");
> -	seq_printf(seq, dateformat[nvram[8] & 7],
> -	    nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/');
> -	seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12);
> -	seq_printf(seq, "Boot delay       : ");
> -	if (nvram[10] == 0)
> -		seq_printf(seq, "default");
> -	else
> -		seq_printf(seq, "%ds%s\n", nvram[10],
> -		    nvram[10] < 8 ? ", no memory test" : "");
> -
> -	vmode = (nvram[14] << 8) | nvram[15];
> -	seq_printf(seq,
> -	    "Video mode       : %s colors, %d columns, %s %s monitor\n",
> -	    colors[vmode & 7],
> -	    vmode & 8 ? 80 : 40,
> -	    vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC");
> -	seq_printf(seq, "                   %soverscan, compat. mode %s%s\n",
> -	    vmode & 64 ? "" : "no ",
> -	    vmode & 128 ? "on" : "off",
> -	    vmode & 256 ?
> -	    (vmode & 16 ? ", line doubling" : ", half screen") : "");
> -
> -	return;
> -}
> -#endif
>
> -#endif /* MACH == ATARI */
> +#endif /* CONFIG_PROC_FS */
>
>  MODULE_LICENSE("GPL");
>  MODULE_ALIAS_MISCDEV(NVRAM_MINOR);
> --
> 2.19.2