ARCH=x86 patch

[H. Peter Anvin]

I am confused, because I could have sworn I had tested this combination 
already, but having applied Jeff's UM fix and then David's ARCH=x86 
patch on top of that, I now find that all the 32-bit builds crap out 
when building on a 64-bit platform, due to asm-offsets.c being compiled 
with -m64 rather than -m32.

One possibility is that this is a toolchain difference, since I ran the 
previous tests on a Fedora 11 workstation, and I did this test tonight 
on a Fedora 10 laptop.

This happens both with unmodified patches on top of the current 
tip/x86/kbuild branch, and on top of linus/master with appropriate 
updates to Jeff's patch to deal with CPPFLAGS_vmlinux.lds having moved 
around inside the UML tree.

I probably won't have time myself to debug this before Linus has to 
close the merge window, but I'm willing to ask for a late pull for this 
given that it's build infrastructure only and the scheduling weirdness 
introduced by LinuxCon/LPC.

Error below.

	-hpa


  gcc -Wp,-MD,arch/x86/kernel/.asm-offsets.s.d  -nostdinc -isystem 
/usr/lib/gcc/x86_64-redhat-linux/4.3.2/include -Iinclude -Iinclude2 
-I/home/hpa/kernel/linux-2.6-tip/include 
-I/home/hpa/kernel/linux-2.6-tip/arch/x86/include -include 
include/linux/autoconf.h  -I/home/hpa/kernel/linux-2.6-tip/. -I. 
-D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs 
-fno-strict-aliasing -fno-common -Werror-implicit-function-declaration 
-Wno-format-security -fno-delete-null-pointer-checks -m64 -mno-red-zone 
-mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args 
-DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe -Wno-sign-compare 
-fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow 
-Os -fno-omit-frame-pointer -fno-optimize-sibling-calls -pg 
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow 
-fprofile-arcs -ftest-coverage   -D"KBUILD_STR(s)=#s" 
-D"KBUILD_BASENAME=KBUILD_STR(asm_offsets)" 
-D"KBUILD_MODNAME=KBUILD_STR(asm_offsets)" -D"DEBUG_HASH=16" 
-D"DEBUG_HASH2=7" -fverbose-asm -S -o arch/x86/kernel/asm-offsets.s 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c 

In file included from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/percpu.h:45, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/current.h:5, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/processor.h:15, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic_32.h:6, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic.h:2, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/crypto.h:20, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:7, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c:2: 

/home/hpa/kernel/linux-2.6-tip/include/linux/kernel.h:184: warning: 
conflicting types for built-in function âsnprintfâ
/home/hpa/kernel/linux-2.6-tip/include/linux/kernel.h:186: warning: 
conflicting types for built-in function âvsnprintfâ
In file included from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string.h:2, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/string.h:21, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/bitmap.h:8, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/cpumask.h:142, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:49, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/irqflags.h:55, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/irqflags.h:57, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/system.h:11, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/processor.h:17, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic_32.h:6, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic.h:2, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/crypto.h:20, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:7, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c:2: 

/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:12: 
warning: conflicting types for built-in function âstrncpyâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:18: 
warning: conflicting types for built-in function âstrncatâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:24: 
warning: conflicting types for built-in function âstrncmpâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:30: 
warning: conflicting types for built-in function âstrlenâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:196: 
warning: conflicting types for built-in function âmemmoveâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/string_32.h:201: 
warning: conflicting types for built-in function âmemchrâ
In file included from 
/home/hpa/kernel/linux-2.6-tip/include/linux/bitmap.h:8, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/cpumask.h:142, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:49, 

                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/irqflags.h:55, 

                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/irqflags.h:57,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/system.h:11,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/processor.h:17,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic_32.h:6,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic.h:2,
                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/crypto.h:20,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:7,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c:2:
/home/hpa/kernel/linux-2.6-tip/include/linux/string.h:54: warning: 
conflicting types for built-in function âstrncasecmpâ
/home/hpa/kernel/linux-2.6-tip/include/linux/string.h:82: warning: 
conflicting types for built-in function âstrspnâ
/home/hpa/kernel/linux-2.6-tip/include/linux/string.h:85: warning: 
conflicting types for built-in function âstrcspnâ
/home/hpa/kernel/linux-2.6-tip/include/linux/string.h:101: warning: 
conflicting types for built-in function â__builtin_memcmpâ
In file included from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/irqflags.h:55,
                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/irqflags.h:57,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/system.h:11,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/processor.h:17,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic_32.h:6,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/atomic.h:2,
                 from 
/home/hpa/kernel/linux-2.6-tip/include/linux/crypto.h:20,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:7,
                 from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c:2:
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h: In 
function â__cpuidâ:
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:725: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:725: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:725: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:725: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h: In 
function âwrite_gdt_entryâ:
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:992: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:992: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h: In 
function âptep_modify_prot_commitâ:
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:1230: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:1230: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h: In 
function âset_pte_atâ:
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:1251: 
warning: cast from pointer to integer of different size
/home/hpa/kernel/linux-2.6-tip/arch/x86/include/asm/paravirt.h:1251: 
warning: cast from pointer to integer of different size
In file included from 
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets.c:2:
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c: In 
function âfooâ:
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:76: 
error: âstruct pt_regsâ has no member named âdsâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:77: 
error: âstruct pt_regsâ has no member named âesâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:78: 
error: âstruct pt_regsâ has no member named âfsâ
/home/hpa/kernel/linux-2.6-tip/arch/x86/kernel/asm-offsets_32.c:79: 
error: âstruct pt_regsâ has no member named âgsâ
make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [sub-make] Error 2
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