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ext2: Use kmemdup rather than duplicating its implementation

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kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memset, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memset.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Link: https://lore.kernel.org/r/20190703131727.25735-1-huangfq.daxian@gmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Fuqian Huang 2019-07-03 21:17:27 +08:00 committed by Jan Kara
parent 555b2c3da1
commit 90f15ac9fa
1 changed files with 1 additions and 2 deletions
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3
fs/ext2/xattr.c
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@ -532,11 +532,10 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
unlock_buffer(bh);
ea_bdebug(bh, "cloning");
header = kmalloc(bh->b_size, GFP_KERNEL);
header = kmemdup(HDR(bh), bh->b_size, GFP_KERNEL);
error = -ENOMEM;
if (header == NULL)
goto cleanup;
memcpy(header, HDR(bh), bh->b_size);
header->h_refcount = cpu_to_le32(1);
offset = (char *)here - bh->b_data;