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compiling kernel 2.6.13

Subject: compiling kernel 2.6.13
From: Damian Dimmich <>
Date: Wed, 31 Aug 2005 14:59:46 +0100
Original-recipient: rfc822;
User-agent: KMail/1.7.2

I had some trouble compiling 2.6.13 for the mips architecture.  I encountered 
two errors:


In the file include/asm-mips/thread_info.h TIF_32BIT was undefined.

I added the following two lines which showed up in parisc and ppc64 's 
thread-info's.  Don't know if these values are correct or if this actually 
works.  It just gets it to compile...
#define TIF_32BIT               5       /* 32 bit binary */
#define _TIF_32BIT              (1<<TIF_32BIT)

The error was in drivers/input/evdev.c which includes 

The error was:
 CC [M]  drivers/input/evdev.o
drivers/input/evdev.c: In function `evdev_write':
drivers/input/evdev.c:193: error: `TIF_32BIT' undeclared (first use in this 
drivers/input/evdev.c:193: error: (Each undeclared identifier is reported only 
drivers/input/evdev.c:193: error: for each function it appears in.)
drivers/input/evdev.c: In function `evdev_read':
drivers/input/evdev.c:254: error: `TIF_32BIT' undeclared (first use in this 


When linking .tmp_vmlinux1, KSEG1ADDR and KSEG1 where reported as undefined 
and linking failed. 
 LD      .tmp_vmlinux1
arch/mips/sgi-ip22/built-in.o(.text+0x2854): In function `ip22_eisa_intr':
: undefined reference to `KSEG1ADDR'
arch/mips/sgi-ip22/built-in.o(.text+0x2864): In function `ip22_eisa_intr':
: undefined reference to `KSEG1ADDR'
arch/mips/sgi-ip22/built-in.o(.text+0x2870): In function `ip22_eisa_intr':
: undefined reference to `KSEG1ADDR'
arch/mips/sgi-ip22/built-in.o(.text+0x28ac): In function `ip22_eisa_intr':
: undefined reference to `KSEG1ADDR'
arch/mips/sgi-ip22/built-in.o(.text+0x28c0): In function `ip22_eisa_intr':
: undefined reference to `KSEG1ADDR'
arch/mips/sgi-ip22/built-in.o(.text+0x293c): more undefined references to 
`KSEG1ADDR' follow
make: *** [.tmp_vmlinux1] Error 1

I fixed this by adding the lines:
#define KSEG1ADDR(a)  (CPHYSADDR(a) | KSEG1)
#define KSEG1     0xa0000000
at the top of the file arch/mips/sgi-ip22/ip22-eisa.c
These are copied from include/asm/addrspace.h

I found it quite strange that it only failed when linking the kernel and not 
earlier.  The file asm/addrspace.h is included in ip22-eisa.c

eisa support is enabled and i'm compiling a 64 bit kernel.
gcc is: 
Reading specs from /usr/mips/lib/gcc-lib/mips-linux/3.3.3/specs
Configured with: ../configure --prefix=/usr/mips --exec-prefix=/usr/mips 
--target=mips-linux --enable-shared --disable-nls --disable-multilib 
Thread model: posix
gcc version 3.3.3 (Debian)


Attachment: ip22-eisa.c.patch
Description: Text Data

Attachment: asm-mips.thread_info.h.patch
Description: Text Data

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