Fix divide by zero error in build_clear_page() and build_copy_page()

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/mips/mm/page.c b/arch/mips/mm/page.c
index d827d6144369..cab81f42eee5 100644
--- a/arch/mips/mm/page.c
+++ b/arch/mips/mm/page.c
@@ -310,8 +310,8 @@ void __cpuinit build_clear_page(void)
         if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
                 uasm_i_lui(&buf, AT, 0xa000);
 
-        off = min(8, pref_bias_clear_store / cache_line_size) *
-              cache_line_size;
+        off = cache_line_size ? min(8, pref_bias_clear_store / cache_line_size)
+                                * cache_line_size : 0;
         while (off) {
                 build_clear_pref(&buf, -off);
                 off -= cache_line_size;
@@ -454,12 +454,14 @@ void __cpuinit build_copy_page(void)
         if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
                 uasm_i_lui(&buf, AT, 0xa000);
 
-        off = min(8, pref_bias_copy_load / cache_line_size) * cache_line_size;
+        off = cache_line_size ? min(8, pref_bias_copy_load / cache_line_size) *
+                                cache_line_size : 0;
         while (off) {
                 build_copy_load_pref(&buf, -off);
                 off -= cache_line_size;
         }
-        off = min(8, pref_bias_copy_store / cache_line_size) * cache_line_size;
+        off = cache_line_size ? min(8, pref_bias_copy_load / cache_line_size) *
+                                cache_line_size : 0;
         while (off) {
                 build_copy_store_pref(&buf, -off);
                 off -= cache_line_size;