From: zhong jiang <zhongjiang@xxxxxxxxxx> when compile the kenrel code, I happens to the following warn. fs/reiserfs/ibalance.c:1156:2: warning: ‘new_insert_key’ may be used uninitialized in this function. memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE); The patch fix it by check the new_insert_ptr. if new_insert_ptr is not NULL, we ensure that new_insert_key is assigned. therefore, memcpy will saftly exec the operatetion. Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx> --- fs/reiserfs/ibalance.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c index b751eea..2c46829 100644 --- a/fs/reiserfs/ibalance.c +++ b/fs/reiserfs/ibalance.c @@ -1153,8 +1153,10 @@ int balance_internal(struct tree_balance *tb, insert_ptr); } - memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE); - insert_ptr[0] = new_insert_ptr; + if (new_insert_ptr) { + memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE); + insert_ptr[0] = new_insert_ptr; + } return order; } -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>