[PATCH 081/437] gcov: convert to read/write iterators

Jens Axboe
2024-04-11T15:34:00Z

kernel/gcov/fs.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index 01520689b57c..02f966688ca3 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -379,14 +379,13 @@ static void remove_node(struct gcov_node *node);
* corresponding file. If all associated object files have been unloaded,
* remove the debug fs node as well.
*/
-static ssize_t gcov_seq_write(struct file *file, const char __user *addr,
- size_t len, loff_t *pos)
+static ssize_t gcov_seq_write(struct kiocb *iocb, struct iov_iter *from)
{
struct seq_file *seq;
struct gcov_info *info;
struct gcov_node *node;

- seq = file->private_data;
+ seq = iocb->ki_filp->private_data;
info = gcov_iter_get_info(seq->private);
mutex_lock(&node_lock);
node = get_node_by_name(gcov_info_filename(info));
@@ -401,7 +400,7 @@ static ssize_t gcov_seq_write(struct file *file, const char __user *addr,
gcov_info_reset(info);
mutex_unlock(&node_lock);

- return len;
+ return iov_iter_count(from);
}

/*
@@ -511,9 +510,9 @@ static void add_links(struct gcov_node *node, struct dentry *parent)
static const struct file_operations gcov_data_fops = {
.open = gcov_seq_open,
.release = gcov_seq_release,
- .read = seq_read,
+ .read_iter = seq_read_iter,
.llseek = seq_lseek,
- .write = gcov_seq_write,
+ .write_iter = gcov_seq_write,
};

/* Basic initialization of a new node. */
@@ -632,8 +631,7 @@ static struct gcov_node *get_child_by_name(struct gcov_node *parent,
* write() implementation for reset file. Reset all profiling data to zero
* and remove nodes for which all associated object files are unloaded.
*/
-static ssize_t reset_write(struct file *file, const char __user *addr,
- size_t len, loff_t *pos)
+static ssize_t reset_write(struct kiocb *iocb, struct iov_iter *from)
{
struct gcov_node *node;

@@ -650,20 +648,19 @@ static ssize_t reset_write(struct file *file, const char __user *addr,
}
mutex_unlock(&node_lock);

- return len;
+ return iov_iter_count(from);
}

/* read() implementation for reset file. Unused. */
-static ssize_t reset_read(struct file *file, char __user *addr, size_t len,
- loff_t *pos)
+static ssize_t reset_read(struct kiocb *iocb, struct iov_iter *to)
{
/* Allow read operation so that a recursive copy won't fail. */
return 0;
}

static const struct file_operations gcov_reset_fops = {
- .write = reset_write,
- .read = reset_read,
+ .write_iter = reset_write,
+ .read_iter = reset_read,
.llseek = noop_llseek,
};

--
2.43.0