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authorKevin Hao <haokexin@gmail.com>2016-07-23 14:42:42 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2016-08-01 11:15:06 +1000
commitc12e6f24d4137822d5019c1f78ac65bd27a3447d (patch)
tree7ebc50a5a62a36e89dc90e801da4f00e59633622 /arch/powerpc/kernel
parent4db7327194dba0cb91f274b0f606785a9ee5108d (diff)
powerpc: Add option to use jump label for mmu_has_feature()
As we just did for CPU features. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/cputable.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index e3da41f8ef93..74248ab18e98 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2243,4 +2243,21 @@ void __init cpu_feature_keys_init(void)
static_branch_disable(&cpu_feature_keys[i]);
}
}
+
+struct static_key_true mmu_feature_keys[NUM_MMU_FTR_KEYS] = {
+ [0 ... NUM_MMU_FTR_KEYS - 1] = STATIC_KEY_TRUE_INIT
+};
+EXPORT_SYMBOL_GPL(mmu_feature_keys);
+
+void __init mmu_feature_keys_init(void)
+{
+ int i;
+
+ for (i = 0; i < NUM_MMU_FTR_KEYS; i++) {
+ unsigned long f = 1ul << i;
+
+ if (!(cur_cpu_spec->mmu_features & f))
+ static_branch_disable(&mmu_feature_keys[i]);
+ }
+}
#endif