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powerpc: Add option to use jump label for mmu_has_feature()

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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>
This commit is contained in:
Kevin Hao
2016-07-23 14:42:42 +05:30
committed by Michael Ellerman
parent 4db7327194
commit c12e6f24d4
4 changed files with 57 additions and 0 deletions
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17
arch/powerpc/kernel/cputable.c
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@@ -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