Re: [PATCH v2 1/2] xfs: Fix compiler warning in xfs_attr_node_removename_setup

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On 7/27/20 8:46 AM, Darrick J. Wong wrote:
On Sun, Jul 26, 2020 at 07:26:07PM -0700, Allison Collins wrote:
Fix compiler warning for variable 'blk' set but not used in
xfs_attr_node_removename_setup.  blk is used only in an ASSERT so only
declare blk when DEBUG is set.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
---
  fs/xfs/libxfs/xfs_attr.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index d4583a0..5168d32 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -1174,7 +1174,9 @@ int xfs_attr_node_removename_setup(
  	struct xfs_da_state	**state)
  {
  	int			error;
+#ifdef DEBUG
  	struct xfs_da_state_blk	*blk;
+#endif

But now a non-DEBUG compilation will trip over the assignment to blk:

	blk = &(*state)->path.blk[(*state)->path.active - 1];

that comes just before the asserts, right?

	ASSERT((*state)->path.blk[(*state)->path.active - 1].bp != NULL);
	ASSERT((*state)->path.blk[(*state)->path.active - 1].magic ==
		XFS_ATTR_LEAF_MAGIC);

In the end you probably just want to encode the accessor logic in the
assert body so the whole thing just disappears entirely.
Alrighty, will fix

Allison

--D

error = xfs_attr_node_hasname(args, state);
  	if (error != -EEXIST)
--
2.7.4




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