korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

kcmp: In get_file_raw_ptr use task_lookup_fd_rcu

Browse Source 
Modify get_file_raw_ptr to use task_lookup_fd_rcu.  The helper
task_lookup_fd_rcu does the work of taking the task lock and verifying
that task->files != NULL and then calls files_lookup_fd_rcu.  So let
use the helper to make a simpler implementation of get_file_raw_ptr.

Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Link: https://lkml.kernel.org/r/20201120231441.29911-13-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2020-11-20 17:14:30 -06:00
parent 64eb661fda
commit ed77e80e14
1 changed files with 2 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
kernel/kcmp.c
View File

@ -61,16 +61,11 @@ static int kcmp_ptr(void *v1, void *v2, enum kcmp_type type)
static struct file *
get_file_raw_ptr(struct task_struct *task, unsigned int idx)
{
struct file *file = NULL;
struct file *file;
task_lock(task);
rcu_read_lock();
if (task->files)
file = files_lookup_fd_rcu(task->files, idx);
file = task_lookup_fd_rcu(task, idx);
rcu_read_unlock();
task_unlock(task);
return file;
}