From: Gao Xiang <gaoxiang25@huawei.com>
To: Chao Yu <yuchao0@huawei.com>,
Dan Carpenter <dan.carpenter@oracle.com>,
Christoph Hellwig <hch@infradead.org>,
Joe Perches <joe@perches.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
<devel@driverdev.osuosl.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
<linux-erofs@lists.ozlabs.org>, "Chao Yu" <chao@kernel.org>,
Miao Xie <miaoxie@huawei.com>, <weidu.du@huawei.com>,
Fang Wei <fangwei1@huawei.com>, Gao Xiang <gaoxiang25@huawei.com>
Subject: [PATCH v3 7/7] erofs: redundant assignment in __erofs_get_meta_page()
Date: Fri, 30 Aug 2019 11:36:43 +0800 [thread overview]
Message-ID: <20190830033643.51019-7-gaoxiang25@huawei.com> (raw)
In-Reply-To: <20190830033643.51019-1-gaoxiang25@huawei.com>
As Joe Perches suggested [1],
err = bio_add_page(bio, page, PAGE_SIZE, 0);
- if (unlikely(err != PAGE_SIZE)) {
+ if (err != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}
The initial assignment to err is odd as it's not
actually an error value -E<FOO> but a int size
from a unsigned int len.
Here the return is either 0 or PAGE_SIZE.
This would be more legible to me as:
if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}
[1] https://lore.kernel.org/r/74c4784319b40deabfbaea92468f7e3ef44f1c96.camel@perches.com/
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
v3: fix a typo in subject line.
fs/erofs/data.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 0f2f1a839372..0983807737fd 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -69,8 +69,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
goto err_out;
}
- err = bio_add_page(bio, page, PAGE_SIZE, 0);
- if (err != PAGE_SIZE) {
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) {
err = -EFAULT;
goto err_out;
}
--
2.17.1
next prev parent reply other threads:[~2019-08-30 3:37 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-30 3:00 [PATCH v2 1/7] erofs: on-disk format should have explicitly assigned numbers Gao Xiang
2019-08-30 3:00 ` [PATCH v2 2/7] erofs: some marcos are much more readable as a function Gao Xiang
2019-08-30 3:16 ` Joe Perches
2019-08-30 3:20 ` Gao Xiang
2019-08-30 3:36 ` [PATCH v3 1/7] erofs: on-disk format should have explicitly assigned numbers Gao Xiang
2019-08-30 3:36 ` [PATCH v3 2/7] erofs: some macros are much more readable as a function Gao Xiang
2019-08-30 3:38 ` [PATCH v4 " Gao Xiang
2019-08-30 6:11 ` [PATCH v3 " Chao Yu
2019-08-30 3:36 ` [PATCH v3 3/7] erofs: use a better form for complicated on-disk fields Gao Xiang
2019-08-30 3:36 ` [PATCH v3 4/7] erofs: kill __packed for on-disk structures Gao Xiang
2019-08-30 6:16 ` Chao Yu
2019-08-30 3:36 ` [PATCH v3 5/7] erofs: kill erofs_{init,exit}_inode_cache Gao Xiang
2019-08-30 6:17 ` Chao Yu
2019-08-30 3:36 ` [PATCH v3 6/7] erofs: remove all likely/unlikely annotations Gao Xiang
2019-08-30 6:25 ` Chao Yu
2019-08-30 6:31 ` Gao Xiang
2019-08-30 6:43 ` Chao Yu
2019-08-30 11:55 ` Dan Carpenter
2019-08-30 11:30 ` Dan Carpenter
2019-08-30 12:06 ` Gao Xiang
2019-08-30 15:46 ` Christoph Hellwig
2019-08-30 16:04 ` Gao Xiang
2019-08-31 10:57 ` Dan Carpenter
2019-08-30 3:36 ` Gao Xiang [this message]
2019-08-30 6:25 ` [PATCH v3 7/7] erofs: redundant assignment in __erofs_get_meta_page() Chao Yu
2019-08-30 16:28 ` Christoph Hellwig
2019-08-30 16:48 ` Gao Xiang
2019-08-30 15:25 ` [PATCH v3 1/7] erofs: on-disk format should have explicitly assigned numbers Gao Xiang
2019-08-30 15:45 ` [PATCH v2 2/7] erofs: some marcos are much more readable as a function Christoph Hellwig
2019-08-30 15:52 ` Gao Xiang
2019-08-30 15:56 ` Gao Xiang
2019-08-30 3:00 ` [PATCH v2 3/7] erofs: use a better form for complicated on-disk fields Gao Xiang
2019-08-30 3:29 ` Chao Yu
2019-08-30 3:00 ` [PATCH v2 4/7] erofs: kill __packed for on-disk structures Gao Xiang
2019-08-30 3:00 ` [PATCH v2 5/7] erofs: kill erofs_{init,exit}_inode_cache Gao Xiang
2019-08-30 3:00 ` [PATCH v2 6/7] erofs: remove all likely/unlikely annotations Gao Xiang
2019-08-30 3:00 ` [PATCH v2 7/7] erofs: reduntant assignment in __erofs_get_meta_page() Gao Xiang
2019-08-30 3:28 ` [PATCH v2 1/7] erofs: on-disk format should have explicitly assigned numbers Chao Yu
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