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ocfs2: eliminate a misreported warning

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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 <thunder.leizhen@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhen Lei 2018-06-07 17:04:47 -07:00 committed by Linus Torvalds
parent 133b81f28e
commit 731a40fab1
1 changed files with 1 additions and 1 deletions
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2
fs/ocfs2/ioctl.c
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@ -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)