---

yaml --- r: 187796 b: refs/heads/master c: 8dbce53 h: refs/heads/master v: v3
git-mirror · Mar 9, 2010 · df6f2b5 · df6f2b5
1 parent d37f3bc
commit df6f2b5
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Showing 4 changed files with 17 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: de0b632ba05bc88949e67d33d1c313fcf922ae2e
+refs/heads/master: 8dbce53cc249a76e9450708d291fce5a7e29c6a1
diff --git a/trunk/arch/powerpc/kernel/head_64.S b/trunk/arch/powerpc/kernel/head_64.S
@@ -617,6 +617,17 @@ _GLOBAL(start_secondary_prolog)
 	std	r3,0(r1)		/* Zero the stack frame pointer	*/
 	bl	.start_secondary
 	b	.
+/*
+ * Reset stack pointer and call start_secondary
+ * to continue with online operation when woken up
+ * from cede in cpu offline.
+ */
+_GLOBAL(start_secondary_resume)
+	ld	r1,PACAKSAVE(r13)	/* Reload kernel stack pointer */
+	li	r3,0
+	std	r3,0(r1)		/* Zero the stack frame pointer	*/
+	bl	.start_secondary
+	b	.
 #endif
 
 /*

diff --git a/trunk/arch/powerpc/platforms/pseries/hotplug-cpu.c b/trunk/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -146,12 +146,11 @@ static void pseries_mach_cpu_die(void)
 		unregister_slb_shadow(hwcpu, __pa(get_slb_shadow()));
 
 		/*
-		 * NOTE: Calling start_secondary() here for now to
-		 * start new context.
-		 * However, need to do it cleanly by resetting the
-		 * stack pointer.
+		 * Call to start_secondary_resume() will not return.
+		 * Kernel stack will be reset and start_secondary()
+		 * will be called to continue the online operation.
 		 */
-		start_secondary();
+		start_secondary_resume();
 
 	} else if (get_preferred_offline_state(cpu) == CPU_STATE_OFFLINE) {
 

diff --git a/trunk/arch/powerpc/platforms/pseries/offline_states.h b/trunk/arch/powerpc/platforms/pseries/offline_states.h
@@ -35,4 +35,5 @@ static inline void set_default_offline_state(int cpu)
 
 extern enum cpu_state_vals get_preferred_offline_state(int cpu);
 extern int start_secondary(void);
+extern void start_secondary_resume(void);
 #endif