powerpc: Clear the BSS at the start of early_init with ARCH=ppc

Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index e68f848f24bfddf266a763219a2ec1c7f597304b..b95f7cf693e69b857cba6b396ea5d9e8bf7f4caa 100644 (file)
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -294,6 +294,10 @@ unsigned long __init early_init(unsigned long dt_ptr)
 {
        unsigned long offset = reloc_offset();
 
+       /* First zero the BSS -- use memset_io, some platforms don't have
+        * caches on yet */
+       memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
+
        /*
         * Identify the CPU type and fix up code sections
         * that depend on which cpu we have.