switch simple cases of fget_light to fdget
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2bd199b..bd9c5bc 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -467,14 +467,13 @@
{
struct perf_cgroup *cgrp;
struct cgroup_subsys_state *css;
- struct file *file;
- int ret = 0, fput_needed;
+ struct fd f = fdget(fd);
+ int ret = 0;
- file = fget_light(fd, &fput_needed);
- if (!file)
+ if (!f.file)
return -EBADF;
- css = cgroup_css_from_dir(file, perf_subsys_id);
+ css = cgroup_css_from_dir(f.file, perf_subsys_id);
if (IS_ERR(css)) {
ret = PTR_ERR(css);
goto out;
@@ -500,7 +499,7 @@
ret = -EINVAL;
}
out:
- fput_light(file, fput_needed);
+ fdput(f);
return ret;
}
@@ -3233,21 +3232,18 @@
static const struct file_operations perf_fops;
-static struct file *perf_fget_light(int fd, int *fput_needed)
+static inline int perf_fget_light(int fd, struct fd *p)
{
- struct file *file;
+ struct fd f = fdget(fd);
+ if (!f.file)
+ return -EBADF;
- file = fget_light(fd, fput_needed);
- if (!file)
- return ERR_PTR(-EBADF);
-
- if (file->f_op != &perf_fops) {
- fput_light(file, *fput_needed);
- *fput_needed = 0;
- return ERR_PTR(-EBADF);
+ if (f.file->f_op != &perf_fops) {
+ fdput(f);
+ return -EBADF;
}
-
- return file;
+ *p = f;
+ return 0;
}
static int perf_event_set_output(struct perf_event *event,
@@ -3279,22 +3275,19 @@
case PERF_EVENT_IOC_SET_OUTPUT:
{
- struct file *output_file = NULL;
- struct perf_event *output_event = NULL;
- int fput_needed = 0;
int ret;
-
if (arg != -1) {
- output_file = perf_fget_light(arg, &fput_needed);
- if (IS_ERR(output_file))
- return PTR_ERR(output_file);
- output_event = output_file->private_data;
+ struct perf_event *output_event;
+ struct fd output;
+ ret = perf_fget_light(arg, &output);
+ if (ret)
+ return ret;
+ output_event = output.file->private_data;
+ ret = perf_event_set_output(event, output_event);
+ fdput(output);
+ } else {
+ ret = perf_event_set_output(event, NULL);
}
-
- ret = perf_event_set_output(event, output_event);
- if (output_event)
- fput_light(output_file, fput_needed);
-
return ret;
}
@@ -6229,12 +6222,11 @@
struct perf_event_attr attr;
struct perf_event_context *ctx;
struct file *event_file = NULL;
- struct file *group_file = NULL;
+ struct fd group = {NULL, 0};
struct task_struct *task = NULL;
struct pmu *pmu;
int event_fd;
int move_group = 0;
- int fput_needed = 0;
int err;
/* for future expandability... */
@@ -6269,12 +6261,10 @@
return event_fd;
if (group_fd != -1) {
- group_file = perf_fget_light(group_fd, &fput_needed);
- if (IS_ERR(group_file)) {
- err = PTR_ERR(group_file);
+ err = perf_fget_light(group_fd, &group);
+ if (err)
goto err_fd;
- }
- group_leader = group_file->private_data;
+ group_leader = group.file->private_data;
if (flags & PERF_FLAG_FD_OUTPUT)
output_event = group_leader;
if (flags & PERF_FLAG_FD_NO_GROUP)
@@ -6450,7 +6440,7 @@
* of the group leader will find the pointer to itself in
* perf_group_detach().
*/
- fput_light(group_file, fput_needed);
+ fdput(group);
fd_install(event_fd, event_file);
return event_fd;
@@ -6464,7 +6454,7 @@
if (task)
put_task_struct(task);
err_group_fd:
- fput_light(group_file, fput_needed);
+ fdput(group);
err_fd:
put_unused_fd(event_fd);
return err;
diff --git a/kernel/sys.c b/kernel/sys.c
index 0cb4283..f949228 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1788,15 +1788,15 @@
#ifdef CONFIG_CHECKPOINT_RESTORE
static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
{
- struct file *exe_file;
+ struct fd exe;
struct dentry *dentry;
- int err, fput_needed;
+ int err;
- exe_file = fget_light(fd, &fput_needed);
- if (!exe_file)
+ exe = fdget(fd);
+ if (!exe.file)
return -EBADF;
- dentry = exe_file->f_path.dentry;
+ dentry = exe.file->f_path.dentry;
/*
* Because the original mm->exe_file points to executable file, make
@@ -1805,7 +1805,7 @@
*/
err = -EACCES;
if (!S_ISREG(dentry->d_inode->i_mode) ||
- exe_file->f_path.mnt->mnt_flags & MNT_NOEXEC)
+ exe.file->f_path.mnt->mnt_flags & MNT_NOEXEC)
goto exit;
err = inode_permission(dentry->d_inode, MAY_EXEC);
@@ -1839,12 +1839,12 @@
goto exit_unlock;
err = 0;
- set_mm_exe_file(mm, exe_file); /* this grabs a reference to exe_file */
+ set_mm_exe_file(mm, exe.file); /* this grabs a reference to exe.file */
exit_unlock:
up_write(&mm->mmap_sem);
exit:
- fput_light(exe_file, fput_needed);
+ fdput(exe);
return err;
}
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index d0a3279..5116b7e 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -415,16 +415,15 @@
struct nlattr *na;
size_t size;
u32 fd;
- struct file *file;
- int fput_needed;
+ struct fd f;
na = info->attrs[CGROUPSTATS_CMD_ATTR_FD];
if (!na)
return -EINVAL;
fd = nla_get_u32(info->attrs[CGROUPSTATS_CMD_ATTR_FD]);
- file = fget_light(fd, &fput_needed);
- if (!file)
+ f = fdget(fd);
+ if (!f.file)
return 0;
size = nla_total_size(sizeof(struct cgroupstats));
@@ -444,7 +443,7 @@
stats = nla_data(na);
memset(stats, 0, sizeof(*stats));
- rc = cgroupstats_build(stats, file->f_dentry);
+ rc = cgroupstats_build(stats, f.file->f_dentry);
if (rc < 0) {
nlmsg_free(rep_skb);
goto err;
@@ -453,7 +452,7 @@
rc = send_reply(rep_skb, info);
err:
- fput_light(file, fput_needed);
+ fdput(f);
return rc;
}