powerpc: Perform an isync to synchronize CPUs coming out of secondary…

…_hold We need to do that to guarantee they see any code change done by dynamic patching during boot. Signed-off-by: Benjamin Herrenschmidt <[email protected]>
td0s · Apr 20, 2011 · dd79773 · dd79773
1 parent 948cf67
commit dd79773
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
@@ -147,6 +147,8 @@ __secondary_hold:
 	mtctr	r4
 	mr	r3,r24
 	li	r4,0
+	/* Make sure that patched code is visible */
+	isync
 	bctr
 #else
 	BUG_OPCODE