powerpc/mm: Move disable_radix handling into mmu_early_init_devtree()

Move the handling of the disable_radix command line argument into the
newly created mmu_early_init_devtree().

It's an MMU option so it's preferable to have it in an mm related file,
and it also means platforms that don't support radix don't have to carry
the code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 11 insertions, 13 deletions

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 9686984e79c4..b4b6952e8991 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -647,14 +647,6 @@ static void __init early_reserve_mem(void)
 #endif
 }
 
-static bool disable_radix;
-static int __init parse_disable_radix(char *p)
-{
-        disable_radix = true;
-        return 0;
-}
-early_param("disable_radix", parse_disable_radix);
-
 void __init early_init_devtree(void *params)
 {
         phys_addr_t limit;
@@ -744,11 +736,6 @@ void __init early_init_devtree(void *params)
          */
         spinning_secondaries = boot_cpu_count - 1;
 #endif
-        /*
-         * now fixup radix MMU mode based on kernel command line
-         */
-        if (disable_radix)
-                cur_cpu_spec->mmu_features &= ~MMU_FTR_RADIX;
 
         mmu_early_init_devtree();
 
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index d0fb33ac3db2..0d51e6e25db5 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -413,7 +413,18 @@ EXPORT_SYMBOL_GPL(realmode_pfn_to_page);
 #endif /* CONFIG_SPARSEMEM_VMEMMAP/CONFIG_FLATMEM */
 
 #ifdef CONFIG_PPC_STD_MMU_64
+static bool disable_radix;
+static int __init parse_disable_radix(char *p)
+{
+        disable_radix = true;
+        return 0;
+}
+early_param("disable_radix", parse_disable_radix);
+
 void __init mmu_early_init_devtree(void)
 {
+        /* Disable radix mode based on kernel command line. */
+        if (disable_radix)
+                cur_cpu_spec->mmu_features &= ~MMU_FTR_RADIX;
 }
 #endif /* CONFIG_PPC_STD_MMU_64 */