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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-04-05 14:34:58 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-04-20 11:03:25 +1000
commitdd797738643cd3c2dd9cdff7e4c3a04d318ab23a (patch)
treef8980e617597c0438da133e529656e0b5489db00 /arch/powerpc/kernel
parent948cf67c4726cca2fc57533dccadfb54d890689d (diff)
downloadlinaro-lsk-dd797738643cd3c2dd9cdff7e4c3a04d318ab23a.tar.gz
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 <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/head_64.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 0700e1135c9..6d17c37f22a 100644
--- 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