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powerpc: Add "memory" attribute for mfmsr()
authorTiejun Chen <tiejun.chen@windriver.com>
Wed, 11 Jul 2012 04:22:46 +0000 (14:22 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 11 Jul 2012 05:25:45 +0000 (15:25 +1000)
Add "memory" attribute in inline assembly language as a compiler
barrier to make sure 4.6.x GCC don't reorder mfmsr().

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@vger.kernel.org

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