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authorAl Viro <viro@zeniv.linux.org.uk>2013-09-22 16:27:52 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-10-24 23:34:54 -0400
commit72c2d53192004845cbc19cd8a30b3212a9288140 (patch)
tree31fcd924438f03d5aa09d13ffd813fb153da37c3 /fs/read_write.c
parent22bd002ee76aa7d7a3393f39d977f6c106153c60 (diff)
downloadlwn-72c2d53192004845cbc19cd8a30b3212a9288140.tar.gz
lwn-72c2d53192004845cbc19cd8a30b3212a9288140.zip
file->f_op is never NULL...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c25
1 files changed, 8 insertions, 17 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index e3cd280b158c..58e440df1bc6 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -257,7 +257,7 @@ loff_t vfs_llseek(struct file *file, loff_t offset, int whence)
fn = no_llseek;
if (file->f_mode & FMODE_LSEEK) {
- if (file->f_op && file->f_op->llseek)
+ if (file->f_op->llseek)
fn = file->f_op->llseek;
}
return fn(file, offset, whence);
@@ -384,7 +384,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
if (!(file->f_mode & FMODE_READ))
return -EBADF;
- if (!file->f_op || (!file->f_op->read && !file->f_op->aio_read))
+ if (!file->f_op->read && !file->f_op->aio_read)
return -EINVAL;
if (unlikely(!access_ok(VERIFY_WRITE, buf, count)))
return -EFAULT;
@@ -433,7 +433,7 @@ ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t
const char __user *p;
ssize_t ret;
- if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
+ if (!file->f_op->write && !file->f_op->aio_write)
return -EINVAL;
old_fs = get_fs();
@@ -460,7 +460,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
- if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
+ if (!file->f_op->write && !file->f_op->aio_write)
return -EINVAL;
if (unlikely(!access_ok(VERIFY_READ, buf, count)))
return -EFAULT;
@@ -727,11 +727,6 @@ static ssize_t do_readv_writev(int type, struct file *file,
io_fn_t fn;
iov_fn_t fnv;
- if (!file->f_op) {
- ret = -EINVAL;
- goto out;
- }
-
ret = rw_copy_check_uvector(type, uvector, nr_segs,
ARRAY_SIZE(iovstack), iovstack, &iov);
if (ret <= 0)
@@ -778,7 +773,7 @@ ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
{
if (!(file->f_mode & FMODE_READ))
return -EBADF;
- if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
+ if (!file->f_op->aio_read && !file->f_op->read)
return -EINVAL;
return do_readv_writev(READ, file, vec, vlen, pos);
@@ -791,7 +786,7 @@ ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
{
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
- if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
+ if (!file->f_op->aio_write && !file->f_op->write)
return -EINVAL;
return do_readv_writev(WRITE, file, vec, vlen, pos);
@@ -906,10 +901,6 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
io_fn_t fn;
iov_fn_t fnv;
- ret = -EINVAL;
- if (!file->f_op)
- goto out;
-
ret = -EFAULT;
if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
goto out;
@@ -965,7 +956,7 @@ static size_t compat_readv(struct file *file,
goto out;
ret = -EINVAL;
- if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
+ if (!file->f_op->aio_read && !file->f_op->read)
goto out;
ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
@@ -1032,7 +1023,7 @@ static size_t compat_writev(struct file *file,
goto out;
ret = -EINVAL;
- if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
+ if (!file->f_op->aio_write && !file->f_op->write)
goto out;
ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);