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yaml --- r: 232044 b: refs/heads/master c: 06ca218 h: refs/heads/master v: v3
git-mirror · Jan 21, 2011 · c7de862 · c7de862
1 parent d4ddd22
commit c7de862
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diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3cb5f1a3e58c0bd70d47d9907cc5c65192281dee
+refs/heads/master: 06ca2188eccbd7932636ac5bde2837297800480e
diff --git a/trunk/arch/powerpc/kernel/entry_32.S b/trunk/arch/powerpc/kernel/entry_32.S
@@ -880,7 +880,18 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_47x)
 	 */
 	andi.	r10,r9,MSR_EE
 	beq	1f
+	/*
+	 * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
+	 * which is the stack frame here, we need to force a stack frame
+	 * in case we came from user space.
+	 */
+	stwu	r1,-32(r1)
+	mflr	r0
+	stw	r0,4(r1)
+	stwu	r1,-32(r1)
 	bl	trace_hardirqs_on
+	lwz	r1,0(r1)
+	lwz	r1,0(r1)
 	lwz	r9,_MSR(r1)
 1:
 #endif /* CONFIG_TRACE_IRQFLAGS */