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SubjectRe: drivers/char/rtc.c compile failure in current 2.4 BitKeeper tree:
On Mon, Dec 01, 2003 at 07:01:17PM -0500, Chris Siebenmann wrote:

> I'm compiling for SMP x86 and getting:
> make[3]: Entering directory `/homes/hawkwind/u0/cks/sys/linux-BK/drivers/char'
> gcc -D__KERNEL__ -I/homes/hawkwind/u0/cks/sys/linux-BK/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -fomit-frame-pointer -pipe -mpreferred-stack-boundary=2 -march=i686 -nostdinc -iwithprefix include -DKBUILD_BASENAME=rtc -c -o rtc.o rtc.c
> rtc.c: In function `rtc_init':
> rtc.c:772: `RTC_IOMAPPED' undeclared (first use in this function)
> rtc.c:772: (Each undeclared identifier is reported only once
> rtc.c:772: for each function it appears in.)
> rtc.c:773: `RTC_IO_EXTENT' undeclared (first use in this function)
> rtc.c: In function `rtc_exit':
> rtc.c:873: `RTC_IOMAPPED' undeclared (first use in this function)
> rtc.c:874: `RTC_IO_EXTENT' undeclared (first use in this function)
> make[3]: *** [rtc.o] Error 1
> It looks like the MIPS changes require these to be defined in
> include/asm-*/mc146818rtc.h (or included files) for all architectures
> (previously RTC_IO_EXTENT was defined in rtc.c and RTC_IOMAPPED didn't
> exist), but only MIPS has been updated to do this. From looking at the
> diffs to rtc.c, it looks like the correct additions are just:

Seems Marcelo didn't (yet?) merge below patch which I had sent to him
separate from the rtc.c patches ...


From Sat Nov 29 04:46:32 2003
Date: Sat, 29 Nov 2003 04:46:32 +0100
From: Ralf Baechle <>
To: Marcelo Tosatti <>
Subject: Supply default values to rtc.c
Message-ID: <>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4.1i
Status: RO
X-Status: A
Content-Length: 677
Lines: 19

This supplies default values (from PC-ish architectures) to the rtc.c

diff -urN --exclude=CVS --exclude=.cvsignore linux-2.4.23/include/linux/mc146818rtc.h linux-cvs-2.4.23/include/linux/mc146818rtc.h
--- linux-2.4.23/include/linux/mc146818rtc.h 2001-11-22 20:46:58.000000000 +0100
+++ linux-cvs-2.4.23/include/linux/mc146818rtc.h 2003-11-28 15:09:41.000000000 +0100
@@ -98,4 +98,12 @@
#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)

+#ifndef RTC_IO_EXTENT
+#define RTC_IO_EXTENT 0x10 /* Only really two ports, but... */
+#define RTC_IOMAPPED 1 /* Default to I/O mapping. */
#endif /* _MC146818RTC_H */
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