powerpc/kernel: Use of_property_read_u32() in rtas_initialize()

This uses of_property_read_u32() in rtas_initialize() so that we
needn't explicitly care the CPU's endian.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 9759dcb..ba5a4cc 100644 (file)
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -1145,7 +1145,8 @@ asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
 void __init rtas_initialize(void)
 {
        unsigned long rtas_region = RTAS_INSTANTIATE_MAX;
-       const __be32 *basep, *entryp, *sizep;
+       u32 base, size, entry;
+       int no_base, no_size, no_entry;
 
        /* Get RTAS dev node and fill up our "rtas" structure with infos
         * about it.
@@ -1154,20 +1155,17 @@ void __init rtas_initialize(void)
        if (!rtas.dev)
                return;
 
-       basep = of_get_property(rtas.dev, "linux,rtas-base", NULL);
-       sizep = of_get_property(rtas.dev, "rtas-size", NULL);
-       if (basep == NULL || sizep == NULL) {
+       no_base = of_property_read_u32(rtas.dev, "linux,rtas-base", &base);
+       no_size = of_property_read_u32(rtas.dev, "rtas-size", &size);
+       if (no_base || no_size) {
                rtas.dev = NULL;
                return;
        }
 
-       rtas.base = __be32_to_cpu(*basep);
-       rtas.size = __be32_to_cpu(*sizep);
-       entryp = of_get_property(rtas.dev, "linux,rtas-entry", NULL);
-       if (entryp == NULL) /* Ugh */
-               rtas.entry = rtas.base;
-       else
-               rtas.entry = __be32_to_cpu(*entryp);
+       rtas.base = base;
+       rtas.size = size;
+       no_entry = of_property_read_u32(rtas.dev, "linux,rtas-entry", &entry);
+       rtas.entry = no_entry ? rtas.base : entry;
 
        /* If RTAS was found, allocate the RMO buffer for it and look for
         * the stop-self token if any