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mconsole: switch to kernel_read

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Instead of playing with address limits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2017-09-01 17:39:20 +02:00 committed by Al Viro
parent 8e93157bdd
commit 21cb2559eb
1 changed files with 1 additions and 6 deletions
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7
arch/um/drivers/mconsole_kern.c
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@ -148,12 +148,7 @@ void mconsole_proc(struct mc_request *req)
}
do {
loff_t pos = file->f_pos;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
len = vfs_read(file, buf, PAGE_SIZE - 1, &pos);
set_fs(old_fs);
file->f_pos = pos;
len = kernel_read(file, buf, PAGE_SIZE - 1, &file->f_pos);
if (len < 0) {
mconsole_reply(req, "Read of file failed", 1, 0);
goto out_free;