On Tue, Jul 19, 2016 at 7:52 PM, Arnaldo Carvalho de Melo
[off-list ref] wrote:

Em Wed, Jul 20, 2016 at 09:53:33AM +1000, Stephen Rothwell escreveu:

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On Wed, 20 Jul 2016 09:21:57 +1000 Stephen Rothwell [off-list ref] wrote:

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On Tue, 19 Jul 2016 14:45:51 -0300 Arnaldo Carvalho de Melo [off-list ref] wrote:

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 #if BITS_PER_LONG != __BITS_PER_LONG
+#include <linux/stringify.h>
+#pragma message "BITS_PER_LONG=" __stringify(BITS_PER_LONG)
+#pragma message "__BITS_PER_LONG=" __stringify(__BITS_PER_LONG)
 #error Inconsistent word size. Check asm/bitsperlong.h
 #endif

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I added those three lines to the file (just in yesterday's linux-next
was easiest) and got this:

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/home/sfr/next/next/tools/include/asm-generic/bitsperlong.h:14:9: note: #pragma message: BITS_PER_LONG=(8 * 8)
 #pragma message "BITS_PER_LONG=" __stringify(BITS_PER_LONG)

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/home/sfr/next/next/tools/include/asm-generic/bitsperlong.h:15:9: note: #pragma message: __BITS_PER_LONG=32
 #pragma message "__BITS_PER_LONG=" __stringify(__BITS_PER_LONG)

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(a few times, of course)

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So I applied this:

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+++ b/tools/arch/x86/include/uapi/asm/bitsperlong.h

@@ -4,6 +4,12 @@
 #if defined(__x86_64__) && !defined(__ILP32__)
 # define __BITS_PER_LONG 64
 #else
+#ifndef __x86_64__
+#pragma message "__x86_64__ is not defined"
+#endif
+#ifdef __ILP32__
+#pragma message "__ILP32__ is defined"
+#endif
 # define __BITS_PER_LONG 32
 #endif

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and got this:

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/home/sfr/next/next/tools/arch/x86/include/uapi/asm/bitsperlong.h:8:9: note: #pragma message: __x86_64__ is not defined
 #pragma message "__x86_64__ is not defined"

Humm, it seems that the compiler used is not the cross one, but the
native, check if, say, __powerpc__ is defined.

This is still vdso2c, right?  It's a hostprog.

This stuff is utterly screwed up.  We're building a hostprog for an
x86_64 kernel cross-compiled from powerpc.  We should presumably be
pullng in powerpc's uapi headers for hostprogs because it's a *host*
prog.

--Andy

- Arnaldo

-- 
Andy Lutomirski
AMA Capital Management, LLC