linux-kernel - Re: [patch 4/8] Add asm-compat.h to x86 -> use new asm.h instead

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Message-ID: <20071113203735.GA7450@Krystal>
Date:	Tue, 13 Nov 2007 15:37:35 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [patch 4/8] Add asm-compat.h to x86 -> use new asm.h instead

* H. Peter Anvin (hpa@...or.com) wrote:
> Mathieu Desnoyers wrote:
>> In assembly code and in gcc inline assembly, we need .long to express a "c 
>> long"
>> type on i386 and a .quad to express the same on x86_64. Use macros similar 
>> to
>> powerpc "PPC_LONG" to express those. Name chosen: ASM_LONG. (didn't feel 
>> like
>> X86_LONG was required)
>
> In the x86 queue I already have a patch which adds <asm/asm.h> for this; I 
> used the namespace _ASM_* and the name _ASM_PTR since in Linux it is what 
> holds a pointer.
>
> 	-hpa
>

Andrew, this asm-compat.h patch should be replaced by the asm.h patch
from Peter. Here it is, straight from the x86 merge git repository :


From: H. Peter Anvin <hpa@...or.com>
Date: Fri, 2 Nov 2007 20:59:47 +0000 (-0700)
Subject: x86: add <asm/asm.h>
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fhpa%2Flinux-2.6-x86-headermerge.git;a=commitdiff_plain;h=b02f15537b3bf43e347214cf14bad80aeaef1caf;hp=54866f032307063776b4eff7eadb131d47f9f9b4

x86: add <asm/asm.h>

Create <asm/asm.h>, with common definitions suitable for assembly
unification.

Signed-off-by: H. Peter Anvin <hpa@...or.com>
---

diff --git a/include/asm-x86/asm.h b/include/asm-x86/asm.h
new file mode 100644
index 0000000..b5006eb
--- /dev/null
+++ b/include/asm-x86/asm.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_X86_ASM_H
+#define _ASM_X86_ASM_H
+
+#ifdef CONFIG_X86_32
+/* 32 bits */
+
+# define _ASM_PTR	" .long "
+# define _ASM_ALIGN	" .balign 4 "
+
+#else
+/* 64 bits */
+
+# define _ASM_PTR	" .quad "
+# define _ASM_ALIGN	" .balign 8 "
+
+#endif /* CONFIG_X86_32 */
+
+#endif /* _ASM_X86_ASM_H */


-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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