linux-ext4 - [PATCH 3/3] fs/ext2/inode: Optimize the condition for iomap

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Date:   Sun,  1 Jul 2018 14:18:48 +0800
From:   Huaisheng Ye <yehs2007@...o.com>
To:     dan.j.williams@...el.com
Cc:     dave.jiang@...el.com, willy@...radead.org,
        ross.zwisler@...ux.intel.com, vishal.l.verma@...el.com,
        jack@...e.com, chengnt@...ovo.com, linux-nvdimm@...ts.01.org,
        linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
        Huaisheng Ye <yehs1@...ovo.com>
Subject: [PATCH 3/3] fs/ext2/inode: Optimize the condition for iomap_begin

From: Huaisheng Ye <yehs1@...ovo.com>

If ext2_get_blocks returns negative result, ext2_iomap_begin
will return for error case.
Adjust the judging condition of ret value will be useful for
code simplification.

Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
---
 fs/ext2/inode.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index ca211bd..9b1004d 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -819,15 +819,15 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 	iomap->offset = (loff_t)first_block << blkbits;
 	iomap->dax_dev = sbi->s_daxdev;
 
-	if (ret == 0) {
-		iomap->type = IOMAP_HOLE;
-		iomap->addr = IOMAP_NULL_ADDR;
-		iomap->length = 1 << blkbits;
-	} else {
+	if (ret) {
 		iomap->type = IOMAP_MAPPED;
 		iomap->addr = (u64)bno << blkbits;
 		iomap->length = (u64)ret << blkbits;
 		iomap->flags |= IOMAP_F_MERGED;
+	} else {
+		iomap->type = IOMAP_HOLE;
+		iomap->addr = IOMAP_NULL_ADDR;
+		iomap->length = 1 << blkbits;
 	}
 
 	if (new)
-- 
1.8.3.1