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

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

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index e68f848f24bf..b95f7cf693e6 100644
--- 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.