[PATCH 1/3] powerpc/mm: Initialize the HPTE encoding values

[Laurent Dufour]

Before reading the HPTE encoding values we initialize all of them to -1 (an
invalid value) to later being able to detect the initialized ones.

Signed-off-by: Laurent Dufour <lduf...@linux.ibm.com>
---
 arch/powerpc/mm/book3s64/hash_utils.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/book3s64/hash_utils.c 
b/arch/powerpc/mm/book3s64/hash_utils.c
index c3bfef08dcf8..2039bc315459 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -408,7 +408,7 @@ static int __init htab_dt_scan_page_sizes(unsigned long 
node,
 {
        const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
        const __be32 *prop;
-       int size = 0;
+       int size = 0, idx, base_idx;
 
        /* We are scanning "cpu" nodes only */
        if (type == NULL || strcmp(type, "cpu") != 0)
@@ -418,6 +418,11 @@ static int __init htab_dt_scan_page_sizes(unsigned long 
node,
        if (!prop)
                return 0;
 
+       /* Set all the penc values to invalid */
+       for (base_idx = 0; base_idx < MMU_PAGE_COUNT; base_idx++)
+               for (idx = 0; idx < MMU_PAGE_COUNT; idx++)
+                       mmu_psize_defs[base_idx].penc[idx] = -1;
+
        pr_info("Page sizes from device-tree:\n");
        size /= 4;
        cur_cpu_spec->mmu_features &= ~(MMU_FTR_16M_PAGE);
@@ -426,7 +431,6 @@ static int __init htab_dt_scan_page_sizes(unsigned long 
node,
                unsigned int slbenc = be32_to_cpu(prop[1]);
                unsigned int lpnum = be32_to_cpu(prop[2]);
                struct mmu_psize_def *def;
-               int idx, base_idx;
 
                size -= 3; prop += 3;
                base_idx = get_idx_from_shift(base_shift);
-- 
2.23.0