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>

diff --git a/arch/mips/mm/page.c b/arch/mips/mm/page.c
index d827d61..cab81f4 100644 (file)
--- 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;