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powerc/mm/hash: Reduce hash_mm_context size

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Allocate subpage protect related variables only if we use the feature.
This helps in reducing the hash related mm context struct by around 4K

Before the patch
sizeof(struct hash_mm_context)  = 8288

After the patch
sizeof(struct hash_mm_context) = 4160

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2019-04-17 18:33:51 +05:30 • committed by Michael Ellerman
commit ef629cc5bf
5 changed files with 40 additions and 14 deletions
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