powerpc/pseries: Don't give a warning when HPT resizing isn't available

As of commit 438cc81a41e8 ("powerpc/pseries: Automatically resize HPT
for memory hot add/remove"), when running on the pseries platform, we
always attempt to use the PAPR extension to resize the hashed page
table (HPT) when we add or remove memory.

This is fine, but when the extension is not available we'll give a
harmless, but scary warning. Instead check if the firmware supports HPT
resizing before populating the mmu_hash_ops.resize_hpt pointer.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 251060cf171364f1dd4dd08452189133dd713265..8b1fe895daa3f076bf57b6b9fe3283a6ba686fad 100644 (file)
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -751,7 +751,9 @@ void __init hpte_init_pseries(void)
        mmu_hash_ops.flush_hash_range    = pSeries_lpar_flush_hash_range;
        mmu_hash_ops.hpte_clear_all      = pseries_hpte_clear_all;
        mmu_hash_ops.hugepage_invalidate = pSeries_lpar_hugepage_invalidate;
-       mmu_hash_ops.resize_hpt          = pseries_lpar_resize_hpt;
+
+       if (firmware_has_feature(FW_FEATURE_HPT_RESIZE))
+               mmu_hash_ops.resize_hpt = pseries_lpar_resize_hpt;
 }
 
 void radix_init_pseries(void)