Re: [uml-devel] Problems compiling 2.4 kernel

[BlaisorBlade <blaisorblade_spam@yahoo.it>]

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Alle 18:43, giovedì 1 luglio 2004, Jeff Dike ha scritto:
> Anthony_Brock@ous.edu said:

The problem is another: uml Makefile don't manage properly the 
include/asm/arch symlink, and it is not created:

> asm/arch/posix_types.h: No such file or directory
To workaround this:
cd include
<make sure that asm points to asm-um>
cd asm
ln -s ../asm-i386 arch

There is a lot of other people claiming similar problems. For instance, 
somebody else complained that to build UML he must avoid doing "make mrproper 
ARCH=um" because some files are not recreated (with 2.4.24-3).

However, Anthony, I would recommend using, for optimal stability, a 2.4.26 
vanilla kernel patched with 2.4.24-1um + the attached patch.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729

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--- linux-2.4.26/include/asm-um/system-i386.h	Wed Apr 21 15:33:45 2004
+++ linux-2.4.26-umlfix/include/asm-um/system-i386.h	Wed Apr 21 15:27:14 2004
@@ -5,35 +5,4 @@
 
 #define __HAVE_ARCH_CMPXCHG 1
 
-static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
-				      unsigned long new, int size)
-{
-	unsigned long prev;
-	switch (size) {
-	case 1:
-		__asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
-				     : "=a"(prev)
-				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
-				     : "memory");
-		return prev;
-	case 2:
-		__asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
-				     : "=a"(prev)
-				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
-				     : "memory");
-		return prev;
-	case 4:
-		__asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
-				     : "=a"(prev)
-				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
-				     : "memory");
-		return prev;
-	}
-	return old;
-}
-
-#define cmpxchg(ptr,o,n)\
-	((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
-					(unsigned long)(n),sizeof(*(ptr))))
-    
 #endif