Re: [uml-devel] uml-patch-2.6.1

[BlaisorBlade <blaisorblade_spam@yahoo.it>]

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> This patch updates UML to 2.6.1. 

Try disabling CONFIG_MODE_TT and you'll see that 
arch/um/kernel/skas/include/uaccess.h doesn't compile (it uses EFAULT but 
errno.h is included only by arch/um/kernel/tt/include/uaccess.h).

Also, I never saw depmod (on modules_install, with the patches I said you to 
merge) giving this:
WARNING: 
/home/paolo/Uml/slack90.mnt/lib/modules/2.6.1-1um/kernel/fs/hostfs/hostfs.ko 
needs unknown symbol mknod
WARNING: 
/home/paolo/Uml/slack90.mnt/lib/modules/2.6.1-1um/kernel/fs/hostfs/hostfs.ko 
needs unknown symbol lstat64

This happens because hostfs is not compiled with -O2, since now -O2 is added 
to CFLAGS after including arch/??/Makefile. The inlines that do the needed 
wrapping are defined(in /usr/include/sys/stat.h) only if _OPTIMIZE_ if 
defined (probably because inlines don't work otherwise, but other inlines are 
defined anyway, so there is also a libc bug). So, I'm attaching the fix.
-- 
cat <<EOSIGN
Paolo Giarrusso, aka Blaisorblade
Linux Kernel 2.4.23/2.6.0 on an i686; Linux registered user n. 292729
EOSIGN

[-- Attachment #2: FixHostfs-compile.patch --]
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--- ./arch/um/Makefile.fix	2004-01-18 10:07:33.000000000 +0100
+++ ./arch/um/Makefile	2004-01-18 17:18:17.000000000 +0100
@@ -137,8 +137,21 @@
 # To get a definition of F_SETSIG
 USER_CFLAGS += -D_GNU_SOURCE
 
+#From main Makefile, these options are set after including the ARCH makefile.
+#So copy them here.
+
+ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+USER_CFLAGS		+= -Os
+else
+USER_CFLAGS		+= -O2
+endif
+
+ifndef CONFIG_FRAME_POINTER
+USER_CFLAGS		+= -fomit-frame-pointer
+endif
+
 ifdef CONFIG_DEBUG_INFO
-USER_CFLAGS          += -g
+USER_CFLAGS		+= -g
 endif
 
 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/uml.lds.s \