From: David Howells <dhowells@redhat.com>
To: ralf@gnu.ai.mit.edu
Cc: linux-mips@fnet.fr, linux-kernel@vger.kernel.org
Subject: Re: optimised rw-semaphores for MIPS/MIPS64
Date: Wed, 11 Jul 2001 15:18:14 +0100 [thread overview]
Message-ID: <2574.994861094@warthog.cambridge.redhat.com> (raw)
In-Reply-To: Message from David Howells <dhowells@redhat.com> of "Wed, 11 Jul 2001 15:00:47 BST." <2508.994860047@warthog.cambridge.redhat.com>
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You'll also need the asm-mips*/compiler.h patch.
David
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diff -uNr -x CVS -x TAGS linux-2.4-mips/include/asm-mips/compiler.h linux-mips-rwsem/include/asm-mips/compiler.h
--- linux-2.4-mips/include/asm-mips/compiler.h Thu Jan 1 01:00:00 1970
+++ linux-mips-rwsem/include/asm-mips/compiler.h Wed Jul 11 15:12:33 2001
@@ -0,0 +1,13 @@
+#ifndef __ASM_COMPILER_H
+#define __ASM_COMPILER_H
+
+/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented
+ a mechanism by which the user can annotate likely branch directions and
+ expect the blocks to be reordered appropriately. Define __builtin_expect
+ to nothing for earlier compilers. */
+
+#if __GNUC__ == 2 && __GNUC_MINOR__ < 96
+#define __builtin_expect(x, expected_value) (x)
+#endif
+
+#endif /* __ASM_COMPILER_H */
diff -uNr -x CVS -x TAGS linux-2.4-mips/include/asm-mips64/compiler.h linux-mips-rwsem/include/asm-mips64/compiler.h
--- linux-2.4-mips/include/asm-mips64/compiler.h Thu Jan 1 01:00:00 1970
+++ linux-mips-rwsem/include/asm-mips64/compiler.h Wed Jul 11 15:12:05 2001
@@ -0,0 +1,13 @@
+#ifndef __ASM_COMPILER_H
+#define __ASM_COMPILER_H
+
+/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented
+ a mechanism by which the user can annotate likely branch directions and
+ expect the blocks to be reordered appropriately. Define __builtin_expect
+ to nothing for earlier compilers. */
+
+#if __GNUC__ == 2 && __GNUC_MINOR__ < 96
+#define __builtin_expect(x, expected_value) (x)
+#endif
+
+#endif /* __ASM_COMPILER_H */
next prev parent reply other threads:[~2001-07-11 14:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-11 14:00 optimised rw-semaphores for MIPS/MIPS64 David Howells
2001-07-11 14:18 ` David Howells [this message]
2001-07-11 16:41 ` Andrea Arcangeli
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