linux-kernel - [PATCH 3/4] x86: add kprobe-booster to X86

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Date:	Mon, 17 Dec 2007 14:27:44 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	prasanna@...ibm.com, anil.s.keshavamurthy@...el.com,
	davem@...emloft.net, systemtap-ml <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 3/4] x86: add kprobe-booster to X86_64

Sorry I missed an ifdef in this patch in the following hunk:

@@ -183,6 +185,9 @@ retry:
        }
 
        switch (opcode & 0xf0) {
+#ifdef X86_64
+       case 0x40:
+               goto retry; /* REX prefix is boostable */
        case 0x60:
                if (0x63 < opcode && opcode < 0x67)
                        goto retry; /* prefixes */

Just add the #ifdef to only catch case 0x40.

@@ -183,6 +185,10 @@ retry:
        }
 
        switch (opcode & 0xf0) {
+#ifdef X86_64
+       case 0x40:
+               goto retry; /* REX prefix is boostable */
+#endif
        case 0x60:
                if (0x63 < opcode && opcode < 0x67)
                        goto retry; /* prefixes */

Cheers,

Harvey

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