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authorChristoph Hellwig <hch@lst.de>2017-09-01 17:39:11 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-05 01:05:15 +0200
commitac452acae1caa1a451142a30b4e1ea09cfac4410 (patch)
tree93f24510cff66d776a610838a2285ffe1c6ac9ff /fs/read_write.c
parentautofs4: switch autofs4_write to __kernel_write (diff)
downloadlinux-ac452acae1caa1a451142a30b4e1ea09cfac4410.tar.xz
linux-ac452acae1caa1a451142a30b4e1ea09cfac4410.zip
fs: move kernel_write 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.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 0cc7033aa413..417dbe199505 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -496,9 +496,24 @@ ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t
inc_syscw(current);
return ret;
}
-
EXPORT_SYMBOL(__kernel_write);
+ssize_t kernel_write(struct file *file, const char *buf, size_t count,
+ loff_t pos)
+{
+ mm_segment_t old_fs;
+ ssize_t res;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ res = vfs_write(file, (__force const char __user *)buf, count, &pos);
+ set_fs(old_fs);
+
+ return res;
+}
+EXPORT_SYMBOL(kernel_write);
+
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;