diff options
author | Christoph Hellwig <hch@lst.de> | 2017-09-01 17:39:12 +0200 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-04 19:05:15 -0400 |
commit | c41fbad015dabb0a40ecca50c3ff5658eb6471ff (patch) | |
tree | 8ddce3cb3395cfb031039207c1926abf7fcfd4b4 /fs/read_write.c | |
parent | ac452acae1caa1a451142a30b4e1ea09cfac4410 (diff) | |
download | linux-c41fbad015dabb0a40ecca50c3ff5658eb6471ff.tar.bz2 |
fs: move kernel_read to fs/read_write.c
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r-- | fs/read_write.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 417dbe199505..1ea862bc7efd 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -415,6 +415,22 @@ ssize_t __vfs_read(struct file *file, char __user *buf, size_t count, } EXPORT_SYMBOL(__vfs_read); +int kernel_read(struct file *file, loff_t offset, char *addr, + unsigned long count) +{ + mm_segment_t old_fs; + loff_t pos = offset; + int result; + + old_fs = get_fs(); + set_fs(get_ds()); + /* The cast to a user pointer is valid due to the set_fs() */ + result = vfs_read(file, (void __user *)addr, count, &pos); + set_fs(old_fs); + return result; +} +EXPORT_SYMBOL(kernel_read); + ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) { ssize_t ret; |