From 731a40fab1b305ad71e2b769c0e3550c092dc215 Mon Sep 17 00:00:00 2001 From: Zhen Lei Date: Thu, 7 Jun 2018 17:04:47 -0700 Subject: [PATCH] ocfs2: eliminate a misreported warning The warning is invalid because the parameter chunksize passed from ocfs2_info_freefrag_scan_chain-->ocfs2_info_update_ffg is guaranteed to be positive. So __ilog2_u32 cannot return -1. fs/ocfs2/ioctl.c: In function 'ocfs2_info_update_ffg': fs/ocfs2/ioctl.c:411:17: warning: array subscript is below array bounds [-Warray-bounds] hist->fc_chunks[index]++; ^ fs/ocfs2/ioctl.c:411:17: warning: array subscript is below array bounds [-Warray-bounds] Link: http://lkml.kernel.org/r/1524655799-12112-1-git-send-email-thunder.leizhen@huawei.com Signed-off-by: Zhen Lei Reviewed-by: Andrew Morton Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Joseph Qi Cc: Changwei Ge Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ocfs2/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c index ab30c005cc4b..994726ada857 100644 --- a/fs/ocfs2/ioctl.c +++ b/fs/ocfs2/ioctl.c @@ -402,7 +402,7 @@ static int ocfs2_info_handle_freeinode(struct inode *inode, static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, unsigned int chunksize) { - int index; + u32 index; index = __ilog2_u32(chunksize); if (index >= OCFS2_INFO_MAX_HIST)