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fatfs: switch write_lock to read_lock in fat_ioctl_get_attributes

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There is no need to hold write_lock in fat_ioctl_get_attributes.
write_lock may make an impact on concurrency of fat_ioctl_get_attributes.

Signed-off-by: Yubo Feng <fengyubo3@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Link: http://lkml.kernel.org/r/1593308053-12702-1-git-send-email-fengyubo3@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yubo Feng 2020-08-11 18:35:56 -07:00 committed by Linus Torvalds
parent 88b2e9b063
commit e348e65a08
1 changed files with 2 additions and 2 deletions
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4
fs/fat/file.c
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@ -25,9 +25,9 @@ static int fat_ioctl_get_attributes(struct inode *inode, u32 __user *user_attr)
{ {
u32 attr; u32 attr;
inode_lock(inode); inode_lock_shared(inode);
attr = fat_make_attrs(inode); attr = fat_make_attrs(inode);
inode_unlock(inode); inode_unlock_shared(inode);
return put_user(attr, user_attr); return put_user(attr, user_attr);
} }