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author | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-03 15:57:04 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-11 22:29:40 -0400 |
commit | cd28e28d801e052a3378161c9cb3231828cfaa77 (patch) | |
tree | a9599da6cd2f68f98a38a71beec7cdf05380f45b /drivers | |
parent | 5d5d568975307877e9195f5305f4240e506a2807 (diff) | |
download | linux-cd28e28d801e052a3378161c9cb3231828cfaa77.tar.gz linux-cd28e28d801e052a3378161c9cb3231828cfaa77.tar.bz2 linux-cd28e28d801e052a3378161c9cb3231828cfaa77.zip |
switch drivers/char/mem.c to ->read_iter/->write_iter
Note that _these_ guys have ->read() and ->write() left in place - they are
eqiuvalent to what we'd get if we replaced those with NULL, but we are
talking about hot paths here.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/char/mem.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index ad08400491ae..6b1721f978c2 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -607,16 +607,16 @@ static ssize_t write_null(struct file *file, const char __user *buf, return count; } -static ssize_t aio_read_null(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t read_iter_null(struct kiocb *iocb, struct iov_iter *to) { return 0; } -static ssize_t aio_write_null(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t write_iter_null(struct kiocb *iocb, struct iov_iter *from) { - return iov_length(iov, nr_segs); + size_t count = iov_iter_count(from); + iov_iter_advance(from, count); + return count; } static int pipe_to_null(struct pipe_inode_info *info, struct pipe_buffer *buf, @@ -718,7 +718,7 @@ static int open_port(struct inode *inode, struct file *filp) #define zero_lseek null_lseek #define full_lseek null_lseek #define write_zero write_null -#define aio_write_zero aio_write_null +#define write_iter_zero write_iter_null #define open_mem open_port #define open_kmem open_mem @@ -750,8 +750,8 @@ static const struct file_operations null_fops = { .llseek = null_lseek, .read = read_null, .write = write_null, - .aio_read = aio_read_null, - .aio_write = aio_write_null, + .read_iter = read_iter_null, + .write_iter = write_iter_null, .splice_write = splice_write_null, }; @@ -766,7 +766,7 @@ static const struct file_operations zero_fops = { .llseek = zero_lseek, .write = write_zero, .read_iter = read_iter_zero, - .aio_write = aio_write_zero, + .write_iter = write_iter_zero, .mmap = mmap_zero, #ifndef CONFIG_MMU .mmap_capabilities = zero_mmap_capabilities, |