linux-ext4 - re: ext4: Introduce FALLOC_FL_ZERO

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Message-ID: <20140328080356.GB25192@mwanda>
Date:	Fri, 28 Mar 2014 11:03:56 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	lczerner@...hat.com
Cc:	linux-ext4@...r.kernel.org
Subject: re: ext4: Introduce FALLOC_FL_ZERO_RANGE flag for fallocate

Hello Lukas Czerner,

The patch 1f0e51771281: "ext4: Introduce FALLOC_FL_ZERO_RANGE flag
for fallocate" from Mar 18, 2014, leads to the following static
checker warning:

	fs/ext4/extents.c:3653 ext4_split_convert_extents()
	warn: odd binop '0x4 & 0x10'

fs/ext4/extents.c
  3650          } else if (flags | EXT4_GET_BLOCKS_CONVERT) {
  3651                  split_flag |= ee_block + ee_len <= eof_block ?
  3652                                EXT4_EXT_MAY_ZEROOUT : 0;
  3653                  split_flag |= (EXT4_EXT_MARK_UNINIT2 & EXT4_EXT_DATA_VALID2);
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This statement is a no-op.  Probably | was intended?

  3654          }
  3655          flags |= EXT4_GET_BLOCKS_PRE_IO;

regards,
dan carpenter
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